Re: [Emc-users] BeagleBone + BeBoPr 3D Printing
On 06/02/2013 03:50 PM, Karl Schmidt wrote: > improved surface finish Not really. The slicing software adjusts the extrusion speed to match the XY speed, so the printer lays down a consistent amount of plastic no matter what speed you choose. That's the theory. In practice (and for my setup), higher speeds produce worse results. I think part of the problem is that the extruder must paste the current molten thread onto the previous layer, which requires enough dwell time to melt them firmly together; higher speeds work against that, so things don't stick nearly as well. On the other hand, faster non-printing moves reduce the amount of time the printer spends *not* printing, which is generally a Good Thing... until something shakes loose. -- Ed softsolder.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Pendant recommendations
On 06/02/2013 03:16 PM, Dave wrote: > If you are using a USB joystick as a pendant, which model are you using?? At least for my Sherline, a Logitech Dual-Action gamepad works wonderfully well. Here's the initial description: http://softsolder.com/2010/10/23/logitech-gamepad-as-emc2-pendant-eagle-schematics-for-the-joggy-thing/ It gives direct four-axis control: XY on the left, ZA on the right. The buttons along the top provide full-speed rapids and the joysticks go down to crawling speeds. The HAL circuitry detects which joystick axis starts moving and locks out all the others, which prevents inadvertent motion along an axis that you've already lined up against an edge. The buttons don't have that lockout, so you can slew diagonally at high speed when that's appropriate. More HAL wiring uses two of the four buttons on the cable side as an E-stop button: you must push both buttons to trigger the stop. Agreed, software should be in the E-stop loop, but this is a Sherline... and I haven't ever used those buttons, come to think of it, because shutting off the power to the motor driver box works even better. > How practical are USB joysticks for use as pendants on a milling machine? Probably not very, at least on a real milling machine that's spraying coolants and hot chips and piles of swarf all over. On the other hand, gamepads are cheap and easily replaceable, so you don't form a deep emotional attachment to them... -- Ed softsolder.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BeagleBone + BeBoPr 3D Printing
On 06/01/2013 12:39 PM, Charles Steinkuehler wrote: > I particularly like the acceleration control in LinuxCNC. > It seems smoother than the Arduino code. At least on the Marlin firmware branch of the RepRap tree, the interrupt handler switches from one-step-per-interrupt to two/interrupt at 10 k step/s, then to four/interrupt at 20 k step/s, with abrupt step timing changes. These pictures show the step pulses to the X axis of my M2 during the ramp up to 450 mm/s at 5000 mm/s^2: https://www.dropbox.com/s/llrx2ik6vlq4ne9/X%20Axis%20450%20mm-s%2050%20mm%20-%20100%20us-div%2041.9%20ms%20dly.png https://www.dropbox.com/s/z4w4mg6wklnhvpm/X%20Axis%20450%20mm-s%2050%20mm%20-%20200%20us-div%2019%20ms%20dly.png The top trace is the motor winding current, the bottom trace is the Step pulse from the Arduino to the driver chip. The pulse clusters on the right side show how a single interrupt produces multiple steps, with the *average* rate remaining constant. However, speeds over about 112 mm/s (on the M2, anyway) have irregularly spaced Step pulses. I'm getting ready to disconnect the stock RAMBo board and hitch up LinuxCNC through a Mesa card and some stepper driver bricks to the M2; I think it'll be happier with regular Step pulses! -- Ed softsolder.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/15/2013 10:46 AM, Gene Heskett wrote: > he'd have to patch it Oh, he did, and IIRC cut the carpet as a flap that laid down neatly over the plug... he's that kind of guy. But even if had been a hardwood floor, well, he *is* that kind of guy. > a job fixing them newfangled TV thingies Which, as nearly as I can tell from here, was a perfect fit! -- Ed softsolder.com -- AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/14/2013 07:08 PM, Eric Keller wrote: > cut a hole in the family room floor My buddy Eks got a spectacular deal on a CNC mill that was too tall for his shop doorway: he had to dismount the head. Then, of course, there was no clearance for a hoist between head and ceiling, so he drilled a hole into the bedroom above the shop, put a plate on the floor, threaded a cable through the hole, hauled the hoist into the bedroom, and finished the job. As he put it, "Heck, it's just a little hole under the bed. Nobody will ever notice it." He *does* have a wife, but she's used to his, ah, quirks... -- Ed softsolder.com -- AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] "Easy" 3D Re: Correct use of subroutines
On 05/13/2013 06:41 PM, Gregg Eshelman wrote: > As for sketchup, unless it's seen some massive debugging and improvements, > it's a very nice utility > for creating some of the most fouled up 3D geometry Aye! But the objects *look* good, so they should print fine. Right? [wince] I've given up explaining why Sketchup isn't good for solid modeling, but I also no longer (try to) advise people who have a totally botched model what went wrong. That maximizes the total happiness. But Sketchup seems to be the least user-hostile program out there for folks who want to "build things". OpenSCAD definitely isn't the answer and traditional CAD/CAM packages aren't for those folks, either. 'Tis a puzzlement. -- Ed softsolder.com -- AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/13/2013 08:43 AM, andy pugh wrote: > feed it STL rather than G-code Or, perhaps, an OpenSCAD model in source-code format, although you'd really want a better set of primitives that take advantage of arcs and suchlike. STL can't handle multiple colors / materials, has only triangle tesselation, and really shouldn't be the basis of further development. Just like G-Code, it'll live forever. [grin] > doesn't let you control things like fill patterns. The newer, more consumer-oriented UIs have eliminated the myriad knobs we enjoy fiddling with, replacing them with a linear scale: fine, medium, coarse. It (or the original programmer) then chooses detailed settings based on the desired outcome, slices the model accordingly, and drives the printer. The real problem (and it *is* a real problem) then becomes generating the model geometry. Based on a very small sample, non-techies have trouble with 3D modeling and fancier CAD programs aren't the answer... -- Ed softsolder.com -- Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Correct use of subroutines
On 05/13/2013 02:01 AM, Rafael Skodlar wrote: > emerging personal 3D printing. G-Code is largely irrelevant for 3D printing: it's nothing more than an intermediate "machine language" between the slicer and the printer. The complexity of the motions required to produce a single layer of a model prevents anybody from writing or even modifying that code by hand: the slicer output is essentially a write-only code blob. A typical G-Code file for a small object contains half a megabyte of instructions; some of my models exceed 10 MB. For example, a 6 MB file has 141000 lines of G-Code. The slicers add short, hand-written G-Code routines to the beginning and end of the automatically generated G-Code blob, as well as insert shim routines at each layer and tool change. However, those routines perform stereotyped functions, such as axis home, nozzle wipe, motor disable, and camera trigger, that would be configured and written by the "machine integrator" rather than the "machine operator". In the current DIY 3D printing world, one person may play both of those roles, but that era is coming to an end. In any event, unlike a subtractive machine tool, you can't pause a 3D printer, hack the G-Code, and fire it up again: time, tide, and molten plastic wait for no operator! To a reasonable approximation, a 3D printer's software stack eats solid models and produces plastic shapes, with no human intervention along the way. The typical user has no idea what G-Code is and really shouldn't get involved at that level: the "high level language" describes the object geometry, not the production method. -- Ed softsolder.com -- Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] convert mill
andy pugh wrote: > On 8 May 2013 15:22, wrote: > > > To be fair, it probably depends on what you want it for. > However, it is instructive to slap the head of one, and watch it go "boing" > > It may be that mine is a particularly poor example of the genre, and having > a table that is really meant to be a lathe cross-slide does not do my > variant (a combination machine) any favours. > > A second-hand industrial machine will make you happier, though. > Ooh! Look! > http://www.ebay.com/itm/ACIERA-F1-UNIVERSAL-MILLING-MACHINE-/130902771785?pt=LH_DefaultDomain_0&hash=item1e7a69c849 > > Needs a vertical head, though. > > Take off the overarm and you have a small HMC!! Where's the tool changer? ;-) Ed. -- Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Creep in X axis
Marius Liebenberg wrote: > On 2013/05/04 06:55 PM, andy pugh wrote: > >> On 4 May 2013 17:45, Marius Liebenberg wrote: >> >> >>> difficult to see because the error is +/- 1% of the total travel and in >>> one direction only. >>> >> Is the error in measured position or indicated position? >> > > Andy the position is measured physically. > > >> Does either of the commanded position / actual position show the >> expected position (toggle with @, or use the menu, if using Axis) >> > The position shown is the expected position but not the real measured > position. It would seem that it could be missing counts in one direction. > > > I had that problem on my Hardinge CHNC, the position would creep after rapiding back and forth a few times. DRO reading was proper but diameters would change. The X axis encoder coupler was slipping slightly, why it only slipped one way is still a mystery but thats what it was. Ed. -- Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Is a 750 Mhz Athlon enough for LinuxCNC?
Gregg Eshelman wrote: > 750 Mhz Slot A Athlon <http://www.cpu-world.com/CPUs/K7/AMD-Athlon 750 - > AMD-K7750MTR52B A.html> > AOpen AK72 motherboard http://www.motherboard.cz/mb/aopen/ak72.htm > 768 meg PC133 SDRAM and a nVidia 5200 AGP card with 128 meg > > Is that good enough to run LinuxCNC for a small 2 axis gantry? > > I ran a 700 on a two axis setup with 8.04 and EMC2.3.4 and it took forever it seemed to bring up Gedit and screen updates were very slow. Faster hardware is cheap now. 2 Ghz will run step/direction servos fine. Ed. -- Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Machine documentation: software, best practices
On 04/16/2013 07:53 PM, Gene Heskett wrote: > That long? Back in the day, when the usual group met at a friend's house for burgers and car fixin', that was his standard warranty. He also had a caveat: while he was willing to help you fix anything, you couldn't complain if you took some leftover parts home in a brown paper bag. A good time was had by all... -- Ed softsolder.com -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Machine documentation: software, best practices
On 04/16/2013 08:48 AM, andy pugh wrote: > It would be nice to be able to generate a nice HAL diagram I recently beat the Eagle-to-HAL scripts and libraries into producing a complete HAL configuration for my Sherline, with USB Joggy Thing, XYXA axes, probe & home switches, plus the default "manual toolchanger": http://softsolder.com/2013/03/06/eagle-hal-configuration-sherline-hal-file-2/ Shorter link: http://wp.me/poZKh-3k2 Those schematics describe everything in the (admittedly few) HAL files for the Sherline and produce one monster auto-generated HAL file with the complete set of interconnections. The tedious part involves creating Eagle library "parts" to match the HAL components, but there's a good selection of the basics already available. I'll be forcing myself to do Mesa 5i25 / 7i76 boards (for some of the many firmware loads) in the near future. With the Eagle parts in hand, wiring 'em up in a schematic is straightforward. I think it's easier to see what's going on and *definitely* easier to make changes in a schematic than in the raw HAL text files. > but I am not sure any have been shown to work properly. Hasn't blown up on me yet, but the warranty covers only 30 seconds or the end of the driveway, whichever comes first... -- Ed softsolder.com -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A project I want to do on a CNC mill
On 04/11/2013 11:20 PM, Gregg Eshelman wrote: > The radius of the points of the triangles is given as 0.228 inch I read it as "0.22R", which is almost exactly half the "0.438 DIA" given for the holes. Using 0.438/2 would be Close Enough, methinks. That'd be fun to construct on a 3D printer... one with a build platform the size of my living room! -- Ed softsolder.com -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] off topic component question
Kent Reed wrote: > On Mar 18, 2013 10:12 AM, wrote: > >> On Mon, 18 Mar 2013, andy pugh wrote: >> >> >>> On 17 March 2013 09:18, wrote: >>> >>>> I have a need to read dc current >>>> 36 volts up to 100 amps "reasonably" accurate >>>> I am looking at Tamura L03S100D15 with Arduino >>>> I am sure y'all have other suggestions hopefully cheaper SNIP > The difficult bit > for me would be finding a DC supply capable of sustaining 100A but I assume > you must have one or you wouldn't be looking for a way to measure 100A. > Keep in mind the Hall-effect sensor is current sensitive. 1V is as good as > 36V for exciting your test harness with a concomitant reduction in power > consumption. > Find a buddy with an arc welder. 100Amps is a piece of cake. Ed. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PPMC.ini, Help with my math
Jon Elson wrote: > > Oh, I should add this discussion is about some REALLY old boards. Bruce > Klawiter's PPMC board set was made in 2007. These improvements were > added to the UPC/USC boards by hand about 2008 or so, and by traces > on the boards by 2009 or so. > > Jon > I checked mine and they are both Rev 3.1 and have the resistors soldered to the bottom of the board. The one on the Hardinge works perfectly, the other is patiently waiting for me to hook it up to the Fanuc red cap servos. Ed. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PPMC.ini, Help with my math
> What version of PPMC motherboard do you have? Does it have a little > SIP resistor pack plugged into sockets at RP1, at the end opposite to > the power and DB-25 connector? If it doesn't, then does it have an > array of individual resistors at P3? If neither of these, then I > can easily understand the problems you are having. The original > PPMC was designed to work with the old, slow, 5 V parallel > ports on the computers of the day, (note your PPMC boards were > purchased in early 2007) and won't work reliably on newer > computers with faster, 3.3 V parallel ports. > > I had to add a bunch of terminating resistors and make some other > adjustments on the motherboard to improve reliability for the newer > ports. > > Jon > > Does this apply to the UPC cards? Ed. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Oversized balls
Steve Blackmore wrote: > On Sat, 16 Feb 2013 13:34:52 +, you wrote: > > >> Has anyone tried reducing the backlash in a ballnut by fitting oversized >> balls? >> If so, how did it turn out? >> > > Andy - commercially they don't replace every ball with oversize ones. > Some do, some don't. > They replace every "n" th ball with a slightly oversize one. If the rebuilder uses two different sizes then the smaller ones alternate with the larger, that way the smaller counter rotate to keep down friction. The load capacity decreases. Any other ratio defeats the purpose. > It's a bit > of a black art and the guys sort of do it by feel. Feel is the key, that and having a varied selection of sizes to try. > I've seen a screw > that was rebuilt by some company in the midlands and it was superb, and > much cheaper than a replacement, but still out of my pocket. > > I did have a go doing all the linear slides on an Isel router, I > replaced every 5th ball with oversize ones and replaced all the other > balls with correctly sized ones and it worked great. Only having 1 of 5 oversize either loses rigidity with the correct size or greatly increases the strain on the individual balls and the contact points of the slide if you go oversize and go by feel > That had had a hard > life cutting ceramic and the dust had got in despite the fact the ways > are covered and the inside was air pressurized in an attempt to keep the > dust out. > > Steve Blackmore > -- > Ed. -- The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials, tech docs, whitepapers, evaluation guides, and opinion stories. Check out the most recent posts - join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Oversized balls
Andy Pugh wrote: > On 16 Feb 2013, at 14:58, ed wrote: > > >> Do you have backlash the full length or is the screw worn in the middle? >> Most can be reballed to reduce the slop but you must be careful that the >> OD of the ball does not bear, you want contact on the quadrants. How >> much backlash do you have now? >> > > Turning the pulley by hand between positions with the table clamped shows > 0.08mm delta on the DRO. > This is with brand-new parts, but no preload. RSW pattern nut. > With that amount of backlash I would try some that were .1mm larger then check it again. Without knowing the pressure angle it makes it difficult to give a solid number. Is this a single nut? Some are doubles with shims between to set lash, they of course cost more. Ed. -- The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials, tech docs, whitepapers, evaluation guides, and opinion stories. Check out the most recent posts - join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Oversized balls
andy pugh wrote: > Has anyone tried reducing the backlash in a ballnut by fitting oversized > balls? > If so, how did it turn out? > > Do you have backlash the full length or is the screw worn in the middle? Most can be reballed to reduce the slop but you must be careful that the OD of the ball does not bear, you want contact on the quadrants. How much backlash do you have now? I put new balls in my Well-Index X axis and it tightened it right up. Luckily the screw had very little wear. Ed -- The Go Parallel Website, sponsored by Intel - in partnership with Geeknet, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials, tech docs, whitepapers, evaluation guides, and opinion stories. Check out the most recent posts - join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] LinuxCNC for DIY 3D Printing
On 01/11/2013 11:19 PM, Gene Heskett wrote: > a 6 pack of the $50 2M542's in my stuff > Zero problems in a year + so far. I wonder whether the 2M542 bricks for sale today bear any resemblance to the ones you have: *all* the eBay listings have the same part number and description, but different pictures (some of which actually show a "542" on the brick). Of course, the pictures rarely correspond to the actual item in the shipping box; it's a surprise every time. But you give me some confidence that they'll be serviceable, particularly for the relatively light duty involved in 3D printing: no swarf! I don't know what voltage the M2 motor power sends to the drivers, but that's easily swapped out. It looks like fun... -- Ed softsolder.com -- Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122412 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] LinuxCNC for DIY 3D Printing
On 01/14/2013 03:35 PM, Chris Morley wrote: > added to the 5i25/7i76 combo I missed that; it would certainly solve the I/O problem in big way, too. Have I also missed a giant Mesa configurator showing how all the bits & pieces fit together? Admittedly, I must spend more time pondering the manuals, but I really don't have a good overview of what's available and how it all fits together. > a USB themometer That's cute! It would be fine for monitoring motor temperatures and suchlike, as the heated bed and extruder would shrivel that plastic cable right off... [grin] Thanks for the ideas! -- Ed softsolder.com -- Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122412 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] LinuxCNC for DIY 3D Printing
TL;DR summary: advice needed on a LinuxCNC-based 3D printer project. The background... About a year ago, high-end DIY 3D printers outstripped the capabilities of Arduino-based controllers: the gymnastics required to stuff acceleration control into 8 bit microcontrollers appears to be a dead end. There's a notion of re-re-writing the Arduino firmware in 32 bit style for [ARM | Beagle | RPi | whatever] running on another generation of custom microcontroller boards. Rather than waiting for more of the same, I want to explore what LinuxCNC can enable for an advanced (albeit Cartesian) DIY 3D printer, starting with a solid motion-control foundation plus all the other features LinuxCNC provides, the ones that would require serious firmware development for Arduino-based code. For example... Hard real time motion control, rather than interrupt-based motor handlers that go awry when userland code inadvertently disables interrupts to bit-bang an I2C peripheral. Userland scripting, extensible language features, a G-Code dialect with loops / branching / subroutines, stuff like that. Probing the build platform to correct for for height variation and misalignment: probekins. I think a HAL-based extruder model that could include second- and third-order effects should provide better control than a simple linear/angular axis, particularly for a printer with multiple extruders. The plasma torch controller modules seem like good starting points. Similarly, ladder logic offers interesting possibilities for an extruder "tool changer". LinuxCNC offers a *much* better UI, with devices that aren't teleported from 1990. I want to get a Touchy interface running early, just to show it off, plus the usual gamepad jogging and suchlike. Network-aware capabilities right out of the box, a real operating system, and enough compute power & storage to make everything work. Plus all the topics I can barely pronounce when you folks discuss using them on your industrial machinery. The hardware plan... I'll start with a stock Makergear M2, which seems to be the most solid and well-designed DIY printer currently available. I'd prefer an enclosure to stabilize the ambient temperature, but that's basically a big box. Once the stock M2 works well enough, replace its RAMBo controller with Mesa 5i25 + 7i76. The 7i76 has enough robust digital outputs to drive SSRs for heaters and whatnot, with HAL components closing the temperature loops. The thermal time constants seem long enough to not require high-frequency PWM proportional control, which should simplify things. It also has sufficient digital inputs for home switches, probe contacts, and stuff like that. However, the printer controller also needs multi-channel thermocouple inputs, because thermistors seem underqualified for long-term measurements at 200+ C. I'd like to use a Mesa 7i87 for analog input, but it appears unsupported by the HostMot2 driver: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Mesa_Cards An alternative might be some Arduino love with this shield, although four channels seems limiting: http://www.mlgp-llc.com/arduino/public/arduino-pcb.html The Mesa 7i32 stepper driver board doesn't connect to the 5i25 at all. I don't know whether a Gecko G540 4 channel board (which is one axis shy of what I want) would make more sense than a quintet of M542H boards hot from the usual eBay vendor, but, for sure, blowing a single-channel board would be much less painful than taking out the Gecko. Although I have some of those tiny Pololu drivers, I think they're underqualified for this job. I'd love to be proven wrong. The goal is to produce a 3D printer with a contemporary control system that's easily extensible and isn't constrained by the quirks of DIY 3D history. Eventually, I want to tinker with better printer mechanics, in particular extruders, but the M2 should suffice for much of the proof-of-concept work. I have the attention of a guy who knows his way around the innards of the latest accelerated-motion-control Arduino firmware. I'll get my M2 running to show it's possible, then poke around at system improvements, after which he can build a similar setup and begin doing wonderful things. What I need... Guidance around my blind spots! F'r instance, I'm sure I've missed a hardware gotcha. Are there more practical ways to drive five stepper axes, get a bunch of digital I/O, and read thermocouples? Although I'm generally a big fan of lashing up surplus parts in my shop, I want to do this with reasonably standard hardware, so as to simplify building the next one. It's coming out of my pocket, however: the sky is *not* the budgetary limit. I'll surely have a bunch more questions as I make progress over the next few months (the M2 will likely
Re: [Emc-users] Milling arbor adaptor
dave wrote: > On Thu, 2013-01-03 at 14:49 +, andy pugh wrote: > >> On 3 January 2013 14:20, Mark Wendt wrote: >> >> SNIP Do you have other holders for this spindle? If so then make an arbor to fit the hob and turn the end down to fit available holder. 1 1/4 shaft, keyed, turned down to fit. Ed. -- Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_122712 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] concrete table
kqt4a...@gmail.com wrote: > how stable is concrete > i have my small mill in a spare bedroom in a wooden enclosure > this is a old house that shifts and moves > nothing ever stays level > my mill is mdf so quite light > if i set the acceleration to fast it dances around > so my question is if i build a table and a concrete top will it remain flat > and stable > that would be a cheap way to gain rigidity and mass > > richard > Find a place that does granite counter tops and see if they have drop out from sink cutout or a left over remnant that is big enough for your use. Ed. -- LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] cnc on windows
Dave wrote: > On 11/23/2012 4:29 PM, andy pugh wrote: > >> On 23 November 2012 19:48, Roland Jollivet wrote: >> >> >> >>> http://www.tenasys.com/index.php/applications/case-studies >>> >>> >> Which leads to: >> http://www.tenasys.com/index.php/test-and-measurement >> >> We use that at work in all our test cells. It does work very well. >> >> If you look at the screenshot, however, you might recognise Windows2000 >> >> >> > > I think if you go back into EMC history (the NIST era), EMC was once run > on Windows NT machines with real time extensions. > > That was abandoned, I believe, due to performance issues with that > particular RTOS system. > > Ironically, Mach4 is suppose to be available on Linux at some point in > the future. > > Dave > Wasn't the earlier version(s) of Mach based on the NIST public domain code? If so it looks full circle. Ed -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] I crashed my machine, now I need a new drill chuck
On 10/30/2012 10:12 AM, Gene Heskett wrote: > anyone who will sell me carbide #68's in ten packs w/o a 3 digit price yet eBay is my parts & tool locker: http://www.ebay.com/itm/New-10pcs-68-Wire-Size-Solid-Carbide-PCB-Print-Circuit-Board-Drill-Bits-/120995129465?pt=LH_DefaultDomain_0&hash=item1c2bdf2879 OK, OK, it has a *four* digit price, but the decimal point is in the right place for me... [grin] I got good resharp bits from Drill Bit City, but it seems they're going out of business. Their broken website offers a few odd drill sets and a drill resharpening machine for 13 large: https://www.drillbitcity.com/Default.asp -- Ed softsolder.com -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G code problem with G95
andy pugh wrote: > On 21 October 2012 16:12, Matt Shaver wrote: > > >> Thanks for confirming what I have been thinking - That G95 is broken >> somehow. >> > > My lathe was running 2.5, and G95 worked as expected. > Deleting the link to motion.spindle-speed-in stopped it working, however. > > I then upgraded to 2.5.1 through the package manager, and G95 still works. > Again, deleting the signal into motion.spindle-speed-in stopped it > dead in its track > I am running 2.51 at this time. Could you tell what the links are? Searching through my HAL files I do not find any connections to "motion.spindle" anything. Most of what I am using comes from Jon's Pico Systems site and cobbled together. Ed. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G code problem with G95
Matt Shaver wrote: > On Sat, 20 Oct 2012 20:44:02 -0500 > ed wrote: > > >> Finally got my Hardinge CHNC lathe up and mostly running and am >> having a problem. Do you simply put G95 on a line then on the next G1 >> make sure there is a F feedrate per rev? What ever I try the prog >> stops with the spindle running on the first G1 line. Baffling. >> >> Maybe someone has a small code snip that works so I can follow the >> code path. >> > > Thanks for confirming what I have been thinking - That G95 is broken > somehow. I consult for Smithy who sells CNC lathes with Linuxcnc > control, and our lathe customers report this same behavior. > Interestingly G76 threading works OK, and it depends upon proper > operation of the index pulse logic and correct spindle direction and > velocity feedback. Is there some other hardware interface or software > configuration issue that prevents G95 from working? Or is it really > broke? > > I don't think the spindle encoder is relevant unless you have closed loop spindle control. My guess is it only looks at the S word rpm's to calculate feed rate. Ed > What can be done to test this? Any signals that need to be monitored in > a halmeter? I'd like to see this fixed, but I haven't reported it yet > as I didn't feel I had enough information to support a bug report. I'm > pretty sure this is a current problem with the latest release. > > Thanks, > Matt > -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] G code problem with G95
Finally got my Hardinge CHNC lathe up and mostly running and am having a problem. Do you simply put G95 on a line then on the next G1 make sure there is a F feedrate per rev? What ever I try the prog stops with the spindle running on the first G1 line. Baffling. Maybe someone has a small code snip that works so I can follow the code path. Thanks, Ed -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT - CNC Workshop not to be hosted by Digital
Chuck wrote: > Hello All as a vendor who has been at the last 10 IMTS shows here ate the > facts. Expensive but $60 K I don't think so. Also if someone wanted to put > together a CNC workshop there are lots of spaces available for paid > conferences. As a famous Detective Joe Friday once said > > > "All we want are the facts." > That is much more in line!! But after I paid so much for parking I kinda wondered.. Lots of goodies to drool over, gotta go next time. Ed. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT - CNC Workshop not to be hosted by Digital
Jon Elson wrote: > Stuart Stevenson wrote: > >> tongue in cheek/ >> if you want exposure think IMTS >> /tongue in cheek >> >> > Some of the guys in our shop at work go there every couple years. They have > that "deer in the headlights" look for a few weeks after. Probably cost > my entire > income for the whole year to set up a booth there, though. > > Jon > I talked to a vendor there in the mid 90's and he said it was $60K for the show. His booth was a 20 by 20 in the basement behind the stairwell in the old South building, the least prime spot you could find in the whole show. He could not even plug in his own equipment, had to call the "electrician" for everthing. Ed. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT - CNC Workshop not to be hosted by Digital
On 10/18/2012 07:59 AM, Ron Ginger wrote: > Any volunteers to give a talk? I could spiff up my Intro to 3D Printing presentation and do an hour of performance art: http://softsolder.com/2011/10/11/lilug-meeting-presentation/ My talk for the local ACM chapter covered more of the math and modeling, which may be too much tech: http://softsolder.com/2012/05/18/presentation-for-poughkeepsie-acm-diy-3d-printing-hardware-software/ A 3D printer build class, along the lines of what you do with the mini-mill, could be a lot of fun. Start with, say, a box containing a Makergear M2 printer: http://www.makergear.com/pages/m2-assembly-instructions Gorgeous hardware and, from all the early accounts, great performance. I kinda-sorta want one, with an eye to retrofitting LinuxCNC, not that there's a pressing need for *another* 3D printer in my shop. [grin] Given the venue logistics, I doubt we could pull off two build classes in that lecture room, but ... maybe for 2014? York sits on the outer edge of how far I can drive in a day; doing the trip in April makes that day *much* more enjoyable. Ann Arbor might as well be on the far side of the planet, alas. -- Ed softsolder.com -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Crowdsourced mass CNC produced private weapons
On 10/16/2012 06:35 PM, Igor Chudov wrote: > having some real fun with their 3D printers! Oh, no, that's not fun. It's *practice* for serious projects! Like, for example, we decided to reinstall a freezer shelf after quite a few years of disuse, only to discover that one of its brackets had gone missing. An hour to build the solid model, another to produce the object: it snapped into place and works perfectly. A strictly non-lethal application, I assure you... -- Ed softsolder.com -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Crowdsourced mass CNC produced private weapons
On 10/16/2012 06:10 AM, charles green wrote: > what would it take to produce printed armor? If you're not too fussy, you can print (small pieces of) chain mail in one pass: http://softsolder.com/2011/06/03/thing-o-matic-chainmail/ Which might protect you from the Barbie Pistol: http://softsolder.com/2011/05/02/what-would-barbie-pack/ But not against heavier weaponry: http://softsolder.com/2011/10/21/zombie-apocalypse-preparations/ I loves me my 3D printer... [grin] -- Ed softsolder.com -- Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] USB KVM switches
On Sun, 2012-09-09 at 12:37 -0400, Kent A. Reed wrote: > Using the "hot key" sequence I can switch between ports > connected to MS Windows systems or from one of them to a port connected > to a Linux system but not vice versa. I have to use the port-selector > buttons on the case to switch from a Unix system. These may be relevant: http://forums.linuxmint.com/viewtopic.php?f=49&t=26548 http://www.linuxquestions.org/questions/linux-general-1/kvm-switch-hotkey-does-not-work-781707/ It seems NumLock can also serve as a hotkey, which I would *not* have expected in the least, or that you can work around the problem by switching to a console, rather than the GUI. Now, as to how a PC swallows keystrokes from a USB keyboard that's plugged into a KVM switch *upstream* of the PC, I have no idea... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MSL Landing: Success!
On Mon, 2012-08-06 at 10:10 -0400, Dave wrote: > I think I would have looked (desperately) for a different solution. One of the engineers (in the movie they put out before the event) observed that the whole series of maneuvers was crazy, but it was the *least* crazy way to accomplish the mission... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rapid Prototype for CNC mill
On Thu, 2012-07-26 at 22:04 -0600, Jeshua Lacock wrote: > deliver low cost more than anything There's a good reason why the commercial outfits charge what they do (other than that they can). But the resolution of DIY printers is now good enough that second-order stuff like rigidity and control bandwidth matter, so ... that must start happening. > I am also curious how the filament feeders could be improved. Use a ribbon filament fed into a cylindrical heater; the increased surface area improves both traction and heat transfer. The original patents cover a spring-loaded shutoff valve that might not work nearly as well as described when immersed in viscous goo. IIRC, there's a crosswise plunger shutoff, too. Rather than retracting the filament with the feed motor, lift the feed assembly with a solenoid by a specified amount to depressurize the nozzle. I should have taken better notes; it got overwhelming after a while. Not to mention that reading patents makes an absolutely marvelous insomnia cure... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rapid Prototype for CNC mill
On Wed, 2012-07-25 at 22:19 -0600, Jeshua Lacock wrote: > like what for instance? Stabilized build environments, extruders with flow-control valves, improved filament feeders, less rickety mechanics... Basically, all the obvious improvements. [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rapid Prototype for CNC mill
On Wed, 2012-07-25 at 11:14 -0600, a...@conceptmachinery.com wrote: > Patent in US has only 15 years life. That is, unfortunately, incorrect, but the right answer isn't easy to figure out: http://www.patentlens.net/daisy/patentlens/2973.html > All those patent that you refer are too old and antiquated. The earliest 3D printing patents are, indeed, beginning to expire, so I expect to see a bunch of interesting developments in the DIY field. However, the fact that older patents expire does not mean that the companies haven't been busy filing derivative patents with similar claims. Following the patent trail up to the present time can provide hours of mingled admiration and horror ... [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rapid Prototype for CNC mill
On Wed, 2012-07-25 at 01:15 -0600, a...@conceptmachinery.com wrote: > problem with reprap is that their main idea is to make cheap machine > -under $ 1000- but not real rapid prototype machine. Although I don't have any inside information, I believe the reason DIY 3D printers have (or don't have) specific features is that most of the original patents remain in effect. These seem to be the fundamental patents: http://softsolder.com/2012/06/29/fundamental-3d-printing-patents/ The patent documents include links to more recent patents that refer back to them, so you can devote as much time as you wish to determining that the neat idea *you* just had has already been invented, patented, and reduced to practice. It worked that way for me, anyhow... [grin] Although converting a CNC mill to a 3D printer seems attractive, I think the second-order effects will make it impractical: speed, cleanliness, ambient environment, stuff like that. As one of my managers put it: "You must first decide whether you're designing a waffle iron or a toaster." Which is not to say that you can't do it for yourself. What you almost certainly *can't* do is invent a commercially viable 3D printer and sell it with impunity... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Status of Linux-emc and 3d printing?
On Fri, 2012-06-29 at 00:59 -0600, Jeshua Lacock wrote: > Ultimaker is currently the fastest > (possibly highest quality too) hobby plastic extruder The Bowden extruder notion seems to have more trouble with ooze: half a meter of filament beyond the drive wheel prevents fast retraction. Reducing the extruder mass certainly improves the speed, at least given the usual under-powered and over-loaded stepper drives... [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Status of Linux-emc and 3d printing?
On Wed, 2012-06-27 at 21:20 -0400, Stephen Dubovsky wrote: > his X3 sized mill does 300ipm That certainly puts it in the running! > What are the acceleration rates on the dedicated machines? Given my heavy custom build platform and 12 V stepper supplies, the accelerations aren't all that spectacular: X = 15 k mm/s^2 and Y = 5 k mm/s^2. The Z axis uses the stock motor, which isn't well suited for microstepping drive, and runs at 1000 mm/s^2. My Sherline runs X and Y at a sleepy 5 in/s^2 = 125 mm/s^2 and Z at 3 in/s^2 = 75 mm/s^2... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Status of Linux-emc and 3d printing?
On Thu, 2012-06-28 at 10:50 -0400, John Stewart wrote: > I don't remember being that impressed with their x/y speeds They tend to produce better results below 30 mm/s, mostly because the stock firmware doesn't use any acceleration limiting at all, and I've seen some down around 10 mm/s near my Sherline's limit. Using firmware that applies acceleration limiting helps with the non-printing moves, but the plywood-and-acrylic frame isn't rigid enough to print accurately much above 40 mm/s. The dreadfully heavy custom build platform in my TOM requires a rather low acceleration, but even the stock platform isn't a real featherweight... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Status of Linux-emc and 3d printing?
On Wed, 2012-06-27 at 12:17 -0400, John Stewart wrote: > as I have a perfectly good CNC mill sitting around… The fundamental problem with a RepStrap made from a typical milling machine is speed: my rather customized Thing-O-Matic prints reasonably well at 30 mm/s and makes rapid motions at 250 mm/s. That's about 70 in/min printing and 600 in/min moving, which seems rather peppy for most affordable milling machines. At those speeds, an "interesting" object requires upwards of a half hour to print, with the largest one taking (IIRC) four hours. Tuned Ultimakers seem to have the fastest printing these days, somewhere upwards of 150 mm/s; call it 350 in/min. You can scale the total time pretty much linearly by the printing speed, because that's what it spends most of its time doing. My Sherline, admittedly a slug, tops out at 24 in/min = 10 mm/s, so larger objects would require a bit over three consecutive shifts. That's why you need a purpose-built 3D printer... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3D Printer Parts
On Tue, 2012-06-12 at 13:22 +0200, Joachim Franek wrote: > Why not use a dmm with rs232 or usb? A quick glance at the search results suggests that the combination of "thermocouple" and "usb" runs about $100 direct from China and *much* more than that from a reputable supplier. You'd need a pair for two extruders, although that might still be cheaper than cobbling up something Arduino-oid on your own. -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3D Printer Parts
On Mon, 2012-06-11 at 22:07 -0600, Jeshua Lacock wrote: > it supports two extruders It has only one thermocouple input, so I'm not sure how you'd control the second extruder head temperature. Being an Arduino, it does have half a dozen analog inputs for thermistors. I don't know whether the stock firmware supports more than one input for the build platform temperature. > the 2nd link you provided fixes that issue? Alas, not at all. Beefing up the traces reduces the power loss on the board and eliminates some of the glitching. It's apparently one of those weird firmware issues that's ascribed to a myriad causes. All I know is that after improving everything, non-MBI firmware on the Motherboard still occasionally kvetches about the extruder controller being nonresponsive. It recovers, though, which suggests the EC firmware gazes into its own navel for a while. The power MOSFETs could be driven by three parallel port pins and a dab of HAL code. Hand-wiring transistors on a protoboard would actually give you enough copper to handle the current. There's been some work on reading analog values from various microcontrollers into HAL through USB. That'd be the hard part of the job, as the MAX6675 seems to be obsolescent, but hand-rolling another thermocouple input is required for a second extruder head, anyway. Note that the EC is "out of stock", which seems to be the fate of backlevel electronics everywhere. Good luck ... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3D Printer Parts
On Sun, 2012-06-10 at 18:09 -0600, Jeshua Lacock wrote: > try the MakerBot extruder controller My experiences with that thing may save you some heartache & confusion: http://softsolder.com/2011/01/06/thing-o-matic-extruder-controller-power-supply-improvement/ http://softsolder.com/2011/01/07/thing-o-matic-extruder-controller-mosfet-supplies/ The MK7 extruder uses a cartridge heater, but I still recommend electrically isolating the thermocouple from the block, as their method of securing the bead to the hot end leaves a bit to be desired. http://softsolder.com/2011/02/06/thing-o-matic-mk5-extruder-protecting-the-thermocouple/ http://softsolder.com/2012/01/07/thing-o-matic-improved-ec-thermistor-connector-orientation/ It is a rather expensive & complex board, given that you'll be using only one thermocouple readout and two MOSFET drivers. It's not obvious that the RS485 interface is as simple as it appears, either, because a common failure seems to involve the Motherboard losing contact with the Extruder Controller. -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Question about steels?
gene heskett wrote: > Hi everybody; > > Basic beginners question: > SNIP > If I wanted to buy some stock steel that carved just as well, or perhaps > even better, what alloy should I be ordering from one of these online metal > peddlers? > > Thanks all. > > Cheers, Gene A Grade 8 bolt will be about 35 on the Rockwell scale, grade 5 is about 30 as is most pre heat treated 4140 stock sometimes called 4140HT. Durralloy(SP) is one trade name for that type of material. Bolts are easier to find though. Ed. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Mon, 2012-06-04 at 18:31 -0600, Jeshua Lacock wrote: > Also, as far as I know, Makerbot et al have not had > much of a legal battle so far. True, but now that they're doing something over $5 M/yr with substantial funding, they look more like a target. Again, I know nothing other than the fundamental truth that money changes *everything*... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Mon, 2012-06-04 at 11:53 -0600, Jeshua Lacock wrote: > you are basing this on what? Rumor, supposition, hearsay, random tales, and watching the slow-motion destruction of mobile phone innovation through internecine IP warfare. The fact that a judge had to rule that APIs can't be copyrighted tells you pretty nearly everything you need to know about the state of the art. Given the current attitude toward IP, there's no reason to expect benevolent behavior from the major players. The only reason we don't see lawyers catapulting over the parapets seems to be that the minor players lack enough money to make it worthwhile... [grin] I've started reading the old 3D printing patents. It's heavy going, but many of the clever ideas I've had / seen elsewhere seem to be covered. Verily, there's little new under the sun and, of course, I'm now coated with a thin layer of precious IP floobydust. As the saying goes: It's not whether you're paranoid, it's whether you're paranoid *enough*. -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Mon, 2012-06-04 at 08:44 -0400, Dave wrote: > Who hold the patents? The big players that have been doing 3D extrusion since the mid 80s, the ones with positive cash flow and actual engineering teams. The Wikipedia article has a list: https://en.wikipedia.org/wiki/3D_printing#Industrial_uses Although the earliest patents have expired, a guy at the presentation I gave to the local ACM chapter mentioned that the reason none of the DIY printers have an enclosed, temperature-controlled build chamber is because whoever (Stratasys or 3DS, I don't recall) holds *that* patent and licenses it with some vigor. I can't cite the number, though, so the story may be n-th hand hearsay. To a good first approximation, machine-shop 3D printing technology is a solved problem at industrial scale (the nanoscale stuff seems blue-sky handwaving). DIY printers started about 25 years behind the state of the art and now lags by just under one patent lifetime, where it's likely to stay. Basement-shop DIY is one thing, building a business around that tech is entirely another matter. None of the DIY players amount to pocket lint in the major league. I expect Makerbot's recent 10 megabuck infusion triggered some talks that circumscribe their enthusiasm, but I have no actual data. That said, I'd love to do a LinuxCNC-based printer, starting with extruder modeling. So many projects, so little time... [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Sun, 2012-06-03 at 21:08 -0400, Dave wrote: > buy one or two PID controllers. The slicing software can produce different extrusion temperatures for different layers (or classes of layers), so the printer needs programmatic control over *everything*. You may as well integrate all that in LinuxCNC, where it belongs. The thermal time constants of small extruders seem to be on the order of tens of seconds, while my hunk o' steel requires minutes. The whole extrusion process is strongly nonlinear along many axes, which is something that's becoming more difficult to ignore as extrusion speeds increase. With XY speeds under about 30 mm/s, the linear assumptions work reasonably well. Moving faster than that shows the limits: oozing from a "stopped" extruder, nonlinear flow-vs-pressure, nonlinear flow-vs-acceleration, and (for my printer) unstable mechanical construction. The threshold obviously varies with printer design & implementation, but the high end of of DIY 3D printing has now collided with the low end of CNC machine control. The limits of the Arduino-class controller programming model are becoming apparent (at least to me, anyhow). LinuxCNC could implement a complex extruder model as a HAL component, with inputs from temperature sensors and motion control, far better than an Arduino-based controller. Handling multiple extruders with different material properties would be relatively straightforward in HAL. Doing all the soon-to-be-required toolchanging, height probing, and platform leveling in HAL / Classic Ladder makes a lot of sense (again, at least to me). Methinks anyone working on such a contraption would receive a visit from a nattily attired lawyer who would explain his employer's view of the US patent system... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: and Soapbox: 3D Printer Mods?
On Sun, 2012-06-03 at 09:54 -0700, Kirk Wallace wrote: > What is going to happen to all of these busts of Yoda once the > entertainment value has worn off? Probably about the same thing as all those decorative projects that show up in Home Shop Machinist / Projects in Metal / Digital Machinist from time to time... [grin] Additive processing has the compelling advantage of producing very nearly zero waste, unlike the piles of oily swarf from subtractive machining. I trust none of the environmental effects cited for anything, but it seems better to make *exactly* what you want, rather than whittling down a solid block of material to extract the widget within. Admittedly, it takes me a shot or three to get the range, but that's generally because I don't have good overall process control; that could be improved by lubricating with more money. Sometimes I don't know the actual dimensions until I can trial-fit the part into whatever it's supposed to repair or enhance, but then I can produce another one just like the other one, without manual intervention. Additive processing is a *different* way of producing parts, both better and worse than subtractive processing. Works for me, anyhow... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Fri, 2012-06-01 at 10:10 -0400, Eric Keller wrote: > anyone that makes things Unlike folks who use industrial-grade machinery to build exquisite widgets (you know who you are), mostly, I fix stuff. Being able to sketch out a solid model and then have it *happen* is wonderfully liberating. The Sherline CNC mill does great work (I just made a plug-ugly manual-CNC scabbard for a garden knife yesterday), but for complex shapes the 3D printer can't be beat. That radio case was what compelled me to get the printer: I couldn't imagine carving another case from solid acrylic on the Sherline. It took a few tries to get the design & sizes right, but now I can build a second and a third with only a few minutes of finishing & fitting; the printer can be building a case while I'm making the PCB to go inside. When we eventually downsize, I know which "machine tool" is a keeper... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Fri, 2012-06-01 at 08:44 -0400, gene heskett wrote: > the bolts are 3/8 but the holes are 7/16 In this case, the bolts were 7/16 and the holes 3/8... [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: > The thing is, what do you do with these parts? Some examples of stuff I've designed & build & used... A case for a GPS+voice amateur radio circuit: http://softsolder.com/2012/04/13/wouxun-kg-uv3d-gps-interface-functional-case/ Adapter to hold a camera on a microscope, a macro lens holder for that camera, plus an LED ring illuminator for the microscope: http://softsolder.com/2011/11/14/canon-sx230hs-microscope-and-close-up-macro-adapters/ http://softsolder.com/2011/04/11/microscope-led-ring-illuminator/ Caliper repair part (no finishing required!): http://softsolder.com/2011/05/27/thing-o-matic-caliper-repair-perfection/ Bike helmet mirror mount (ugly, but better than commercial units): http://softsolder.com/2011/07/01/helmet-mirror-mount-first-light/ http://softsolder.com/2011/06/29/helmet-mirror-mount-solid-model/ Blinky light mount for my recumbent: http://softsolder.com/2012/01/03/planet-bike-superflash-tour-easy-mount/ Cookie cutter: http://softsolder.com/2011/09/07/tux-cookie-cutter/ Fuzz blocker for a Kindle Fire: http://softsolder.com/2012/04/10/kindle-fire-power-button-protector/ Simple stepper motor mount: http://softsolder.com/2011/08/23/nema-17-stepper-motor-mount/ And, of course, improve the 3D printer: http://softsolder.com/2011/04/20/thing-o-matic-x-axis-rod-follower-installed/ Beyond their hand-knitted appearance, the parts are entirely serviceable for most of the things I do. Of course, that may just mean I do simple things that don't involve a lot of stress on either the operator or the user. [grin] Now, admittedly, those parts emerged after the better part of half a year of rebuilding to persuade my Thing-O-Matic to work the way they claimed it would. That's a whole 'nother story... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Which Ubuntu for a new install?
I'm finally getting up my CHNC wired up a piece at a time and am wondering which way to go on the Ubu. version? I have played with 8.04 and it seems to be faster than 10.04, probably because of bloat. The install is in a 2.6Gh machine running Pico Systems hardware so I don't think the latency is quite as important as a step/direction machine. Any thoughts or ideas? TIA Ed. PS Jon,you will be getting some questions as I go. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] database Q?
On Mon, 2012-04-02 at 23:12 -0400, gene heskett wrote: > so if it did do an automatic save Among the other things I set up with a new OO/LO installation: Tools -> Options -> Load/Save General -> check "Save AutoRecovery information every" and set the timer for 10 minutes That dramatically improves the chances of recovering *something*, because if it's turned off, you're stuck with whatever's been manually saved. That might be nothing at all, as you've discovered. But, come now, you *know* recording data on a crash-test dummy box is Bad Technique. Case in point: this past weekend at a robot contest, an otherwise useless stack of shredded dead trees turned out to be absolutely vital... -- Ed http://softsolder.com -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Q re lathe vs axis
On Wed, 2012-03-14 at 22:23 -0400, gene heskett wrote: > PClos on this quad core phenom. Well, OK, use whatever *PClos* uses for remote desktop sharing... it's not like PClos is some mutant without all the usual Linux stuff tucked away under the hood. > linuxcnc runs just fine from its own keyboard, > but not from an ssh login Which is why I'm recommending you do something *other* than wrestle with X through SSH: export the whole [mumble] desktop and be done with it. That's stock technology, designed to Just Work. Anything Linux-oid with a package manager should have *something* that speaks VNC to the far end of the network. Set up the milling box to allow desktop sharing with VNC, set up your desktop box to connect with a VNC desktop, and you're done. Modulo, of course, having your network running, which may not be a given at this point. That, alas, is a real swamp... -- Ed http://softsolder.com -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Q re lathe vs axis
On Wed, 2012-03-14 at 11:04 -0400, gene heskett wrote: > And that man page is as obtuse as any I've seen. Rather than hammering that out by hand, use the remote desktop built right into Ubuntu? On the Ubuntu machine attached to the mill, clicky: System -> Preferences -> Remote Desktop Then select: Allow other users to view your desktop Allow other users to control your desktop Set up the Security section to suit your paranoia. On the Ubuntu machine attached to your Comfy Chair, clicky: Applications -> Internet -> Remote Desktop Viewer It'll show you a list of what's available on your network, which should include the milling machine. Clicky to select, feed in a password if you set it up that way, blow that window up to full screen, and you're there... Works for me, anyhow. I do pretty nearly all the setup & fiddling from the Comfy Chair for both the Sherline & Thing-O-Matic, then drop down to the Basement Lab to actually start building things. Not quite so manly as mud-wrestling with X, but ... -- Ed http://softsolder.com -- Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: thread rolling
Roland Jollivet wrote: > And I thought thread rolling required huge rollers > > http://www.youtube.com/watch?v=rt8VfgfWa54 > > OK, it is a small OD, but I did'nt think it was doable. The whole > contraption looks pretty lightweight . > > Regards > Roland Lightweight except in price. My smaller roller head will do from 12mm to 22mm threads the larger will do 14mm to 32mm. I priced the smaller at $4K+ and the larger at twice that. These I picked up for under $100 after scrapping the lathe they came with. They are the slick trick if you have a lot of threads to make as they are much faster than even a CNC lathe. Setup time can be a killer on small jobs. Ed. -- Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] The future of LinuxCNC mailing lists and bug tracking
On Tue, 2012-02-21 at 10:46 -0600, Jeff Epler wrote: > approval of a user's initial post will be required. My admittedly limited 3-year experience with my Wordpress-based blog shows that exactly zero spammers have figured out how to post one meaningful, on-point comment in order to clear the approve-first-comment bar and then hose the place down with junk. I have seen a few borderline cases, but right up front I say that I reject first comments along the lines of "Cool post!"... and I do. So my data point says approval should work pretty well. -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need an electronic tech smarter than me
On Tue, 2012-02-21 at 23:37 +1100, Erik Christiansen wrote: > the last paragraph of the wikipedia entry for "banana connector" Seems to me that's an eBay market opportunity: who could possibly object to a small envelope with a "gift" from afar? -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need an electronic tech smarter than me
On Tue, 2012-02-21 at 16:15 +1100, Erik Christiansen wrote: > But it has banana sockets, so it'll do me. Murphy also has his way with them, particularly nowadays: http://softsolder.com/2012/02/08/power-supply-banana-jack-misfit/ Grumble... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need an electronic tech smarter than me
On Mon, 2012-02-20 at 17:42 -0500, gene heskett wrote: > 4. All logic outputs with the slots open > are sitting at about 18 millivolts. The doc says "a high output when the optical path is clear", so something's definitely wrong... If that were my board, I'd expect the top-surface ground line running barely 25 mils from the screw terminal pads to be at least mildly shorted to all three output pins. Given the weak pullup, that'd hold all three to ground. With the power disconnected, are all three outputs isolated from each other *and* ground? With both polarities of the DMM? The bottom surface trace from the B terminal along those same pads may give you a clue. Whip out a magnifier and check that clearance. If you have a duplicate unsoldered board, check that one out... Is the board drawing (3 x 25 mA) for the LEDs + maybe (3 x 10 mA) for the detectors? If the detectors aren't powered up, that's a hint. If they *are* powered up, then their outputs are shorted to ground. The datasheet recommends a 100 nF cap "between VCC and ground near the device". That probably doesn't make much difference in a test setup, but I'd be superstitious and slap one cap in place across the board power input. Having just brought up a homebrew PCB, I never cease to be amazed at the wide variety of things that can go wrong. Like having to scratch off a tiny un-etched copper filament shorting a IC pin to ground *under* the IC; it was visible, but just barely, only after I soldered the IC in place. Before that, it wasn't there. [sigh] -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] US Digital encoders?
On Thu, 2012-02-02 at 22:21 -0500, gene heskett wrote: > what can he use for an exciting signal? It seems I'm missing something obvious. I thought the idea was to move the motor back & forth while comparing the commanded (presumably, the actual) position with the encoder's (also, presumably, the actual) position to see if there's any lag / jitter / instability between the two. Using freqgen (plus stepgen or whatever the motor might require) to drive the motor should accomplish the first part. Triggering halscope on (some part of) the output signal, then displaying both output and input traces will reveal their relation. Then use siggen to ramp / sawtooth freqgen and you'll see how the relation varies with speed & acceleration. Yes? -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] US Digital encoders?
On Thu, 2012-02-02 at 09:36 -0500, gene heskett wrote: > that would require a function generator Perhaps gimmicking up a HAL circuit with siggen or freqgen to drive the stepper, then compare the encoder input with the motor output? You probably don't need a sine wave, just drive the motor back and forth at a variable rate: siggen providing a sawtooth wave to freqgen? Surely it'd be more complex than that, but triggering on one edge of the motor output and looking at the corresponding encoder edges should be revealing... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Back to isolcpus=1, again...
On Wed, 2012-02-01 at 10:59 -0500, Tom Easterday wrote: > run the latency-test on the idle core AND run glxgears there (using > taskset to move it too), my latency is very bad. That makes perfect sense: the video involved in glxgears locks out interrupts for protracted periods, so running it on the same core as the real-time handler should dramatically increase interrupt latency. It seems the AXIS UI is much better behaved, so running it on the real-time core doesn't affect latency all that much. Of course, running AXIS on an otherwise idle core will vastly improve overall performance, but that's not really the point of fencing off that core. I'd want to study the whole latency thing a lot more closely, with steppers whining away and the interpreter chewing through G-Code, before concluding that running *anything* other than real-time tasks on that core was a Good Idea. Now, if you had a four-core CPU, you could put the real-time stuff on one core, AXIS on another, have two left for everything else, and get wonderful performance... but, then, that's not a cheap Atom box. [grin] -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Back to isolcpus=1, again...
On Mon, 2012-01-30 at 23:35 -0500, gene heskett wrote: > htop shows 2 cpu's with the 2nd one sitting at 0.0% use. As I understand it, that's the way it should be. The point of isolating the second CPU / core / whatever is to dedicate it to the real-time parts of RTAI, thus reducing interrupt latency. The CPU will sit there, completely idle, most of the time, so that when a real-time interrupt / task needs work, it can be dispatched immediately. Pinning AXIS to that "idle" CPU will definitely make the UI run much faster, but then the interrupt latency will (uh, should) get much worse, with the usual horrible effects on software step pulse generation. At least, that's how I think it works... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] DIY output driver
On Fri, 2012-01-27 at 12:26 -0500, gene heskett wrote: > The LM317T is a linear regulator device > and could be made adjustable so as to compensate for the wiring and > switching loss in your controller. Judging from Viesturs' description in a later message: > Nope, I see 2 resistors in series for the middle leg. The LM317 is probably wired up as a current controller, not a voltage controller: it's providing a fixed *current* to the laser diode, not regulating the voltage across the wires. https://en.wikipedia.org/wiki/File:LM317_1A_ConstCurrent.svg In that mode, the voltage drop from controller to laser doesn't make much difference, at least within reasonable limits. What *does* matter is the voltage supplied to the controller (which sets the compliance it needs to regulate the laser current) and the current available from the raw +12 V supply (which must be greater than the laser current). Tweaking the resistors or substituting a voltage source for the laser controller will let the magic smoke out of the laser! The BD139 has a 1.5 A current rating, with a fairly low hFE = 40. That says it must have 1.0 / 40 = 25 mA of base current to saturate while carrying 1 A. More base current will be better. The 4N25 has a current transfer ratio of 20%, which means the LED current must be 25 / 0.20 = 125 mA. Anything less than that won't provide enough base drive, so the transistor won't saturate, so the laser controller won't get enough power, and the transistor will eventually overheat and die. However, you can't jam that much current through the 4N25's LED. At the risk of sounding like an Olde Farte, the easiest way to get this contraption working is a small mechanical relay: a few tens of mA in will switch an amp of DC on the output. No voltage drops, no muss, no fuss. The optoisolator won't have enough current capacity for the relay, so you will probably need the driver transistor to power the *relay* from the digital output. But there's no need for the optoisolator in that case. Or, of course, I could be completely wrong... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Wed, 2012-01-25 at 22:20 +, andy pugh wrote: > Even that is potentially optional: Oh, *wow*... Yet Another Way to confuse myself beyond recognition. I must put the tool probe switch somewhere more-or-less fixed before I start invoking that code, but I like what it can do! -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Tue, 2012-01-24 at 18:04 -0500, gene heskett wrote: > if I can insert those few lines of code after the M6 T# command. If you add: [EMCIO] TOOL_CHANGE_AT_G30 = 1 Then M6 will move to the G30 position, which you've cleverly set right above the probe switch. Admittedly, you must then call the probe subroutine, but a little sed-fu [grin] should do the trick if pcb2gcode doesn't have an option buried in there to wrap some user code around the tool change. The sourceforge pcb2gcode page has a bullet item: output can be adjusted for automated height probing, see http://www.cnczone.com/forums/showthread.php?t=82628 That discussion points to: http://www.cnczone.com/forums/pcb_milling/82628-cheap_simple_height-probing.html Which seems to be a generalized planar-surface probe process that's likely too complex. All you must do is insert a G38.2 probe-and-set subroutine, because you've already solved the PCB flatness and alignment problems. Some sed-fu should do the trick. I vaguely recall reading that stuff while building my hand-hewn G-Code routines. Mercifully, those didn't have the problem of integrating with anything else in the known universe... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Tue, 2012-01-24 at 00:12 -0500, gene heskett wrote: > Its doing all moves on the .bot. files > in negative X from the reference point I'm pretty sure there's a checkbox along the way that reads "Mirror X axis" to make that answer come out right without any further attention. The Eagle gerbv274x CAM file has a "mirror" option that might do exactly what you need. Probably applies only to the bottom layer, though. [*fails to install pcb2gcode due to dependency hell*] The pcb2gcode man page seems to imply (in --mirror-absolute) that backside mirroring normally takes place at the middle of the board. Perhaps you have one or more of: - the Eagle origin at the wrong spot - the backside Gerber file exported without mirroring - the --mirror-absolute option set/unset I'd expect some option twiddling would solve the problem without resort to G-Code hackage. After all, you're not the first person to mill the backside of a PCB with this tool chain! And you really need an automatic tool height probe switch... really you do! -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Pico Sytems UPC and a Hardinge CHNC
Someone out there probably has worked this out. Hardinge uses home and limit switches and the turret encoder that use a pullup to 12 Volts. The UPC uses isolated 5 Volts for the input ports. The big question is how did you interface these? Current limited opto-isolators come to mind, small signal relays may work if they are fast enough. Any other ideas? Many thanks to any that can help. Ed. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Mon, 2012-01-23 at 22:34 +0200, Viesturs Lācis wrote: > also tells Axis to remember joint positions on shutdown It's a simpleminded XYZA Sherline mill that wouldn't know what to do with a joint if it saw one... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: Possible Retrofit candidate for someone in the heartland
Kirk Wallace wrote: > On Mon, 2012-01-23 at 11:58 -0600, Stuart Stevenson wrote: > >>If no one on this list buys this machine I will bid on it. This machine is >>on the Air Force Base. If I can, I will pick it up for anyone that buys it. >>I have never been on the base before so I don't know their rules. I will >>try to find out. >>Stuart > > > Good luck Stuart. I'm looking forward to seeing what happens to this > machine. My guess is it should make a fine LinuxCNC machine. It looks > like these are still being made: > http://www.wellsindex.com/cnc-milling-machines.html > > I have an older version of that machine running LinuxCNC to a set of Gecko 320's, works great. I do not see an X axis motor in the picture, it should be to the left in the picture mounted to the belt drop box. Ed. -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary homing.
On Mon, 2012-01-23 at 14:56 -0500, gene heskett wrote: > by destroying that known position as the homed flags are set. Although I *do* have home switches on the Sherline, I also inserted [TRAJ] NO_FORCE_HOMING = 1 So it doesn't enforce the must-home-before-moving rule. Axis then starts up wherever it shut down, with the previous position in place, and runs just fine. It doesn't display the "homed" crosshairs, but that really doesn't matter. Ought to work for you... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question on gcode parsing
On Sat, 2012-01-21 at 21:27 +0100, Michael Haberler wrote: > LinuxCNC in the chipmaking corner of the CNC universe. Which it does exceedingly well! For a number of reasons, I don't like the Arduino-based motion control that's common to DIY 3D printers and would vastly prefer LinuxCNC for the high-performance printer that's on my far back burner. The language is close enough, right now, but it'd take some effort to make the answer come out right; which is why I'm spring-loaded to notice discussions about parsers. Returning to my lurking niche... -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question on gcode parsing
On Sat, 2012-01-21 at 12:44 -0600, Jon Elson wrote: > Every numeric value is preceded by a letter telling what it is. Except in the wonderful world of RepRap, wherein they're now (contemplating?) dual-extruder "G-Code" with multiple numeric values after the E axis to mix / simultaneously extrude multiple materials: http://reprap.org/wiki/G-code#M160:_Number_of_mixed_materials The E axis must then absorb a linear "distance" of filament, plus the mix fractions for each material. The RepRap dialect seems to be diverging fairly rapidly from what the LinuxCNC parser understands; in particular, their myriad M codes look like a problem. -- Ed http://softsolder.com -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] LinuxCNC: The new name of the Enhanced Machine Controller
Kent A. Reed wrote: > On 1/19/2012 11:20 AM, Peter C. Wallace wrote: > >>>On 18/01/2012 16:28, Sebastian Kuzminsky wrote: >>> >>>>It's no good, we'd just get sued by the Large Magellanic Cloud… >>> >>>Who are they going to sue in an open source project - the >>>developers ( who are they? anyone who has ever mage any >>>alteration to the software? ), everyone who usues the >>>software? or who? >>> >>>Ian >> >> >>No telling who a Large Magellanic Cloud might sue :-) >> >>Peter Wallace > > > With our luck they'll just build a hyperspatial express route through > our neighborhood, knowing that actions speak louder than words. > > Regards, > Kent Does everyone have their towels? ;-) Ed. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] LinuxCNC: The new name of the Enhanced Machine Controller
Stuart Stevenson wrote:
> I love the 'LinuxCNC' software!
> I love the 'LinuxCNC' software!
> I love the 'LinuxCNC' software!
> I love the 'LinuxCNC' software!
> I love the 'LinuxCNC' software!
> I love the 'LinuxCNC' software!
> I love the 'LinuxCNC' software!
> I love the 'LinuxCNC' software!
>
> I don't care what we call it - just keep it going
>
> did I mention?
> I love the 'LinuxCNC' software!
>
> thanks
> Stuart
>
Since I am a very slow typist can I just type LCNC
LCNC
LCNC
LCNC
LCNC
Ed.
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Re: [Emc-users] eagle-6.1.0 (again)
On Wed, 2012-01-18 at 13:46 +1100, Erik Christiansen wrote: > Nope, to update the library info used in an open schematic editor, hit > Library->Update and select the modified library, or just use > Library->Update_All. That's exactly what I expected to work, but it didn't: http://softsolder.com/2011/11/13/emc2-logitech-gamepad-trigger-button-name-change/ Of course, that involved a pin name change, rather than a footprint or wiring change, which may make all the difference. Mutter... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] eagle-6.1.0 (again)
On Wed, 2012-01-18 at 00:03 -0500, gene heskett wrote: > Alright, how about this one? That'll work! [grin] And who knows? My Larval Engineer may remember how to poke around inside the safety covers without dying, in some future day when they desperately need a fix right *now*... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] eagle-6.1.0 (again)
On Tue, 2012-01-17 at 20:30 -0500, gene heskett wrote: > If I fix the library, > will that fix the schematic when it is next loaded? Nope, the schematic holds copies of all the components, so that you can't inadvertently wreck all your circuits with a single library change. You must delete all instances of the old part from the schematic, refresh the library to get the new part, and then re-place all of them. It's a pain, but it does make a certain kind of sense. > those manuals were in my mailbox this evening. Excellent! Now, keep telling the occasional war story... -- Ed http://softsolder.com -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] tapping problem?
a...@conceptmachinery.com wrote: >>a...@conceptmachinery.com wrote: >> >>>Hi >>>i there spindle motor and motor drive that can be better used for >>>tapping? >>>Problem with use tap is that spindle motor can easy crash tap and after >>>that extra charge - + equipment - to remove broke tap from hole. >>> >> >>I have been using rigid tapping with EMC2 for almost 2 years. It works >>amazingly well. >>You do have to be sure the tap will not reach the bottom of the hole. >>There is no system >>I can think of that can stop the motor quickly enough if this happens, >>and even using >>a torque-limiting clutch will not prevent all catastrophes. > > Hi > Tapping cycle use very slow motion, why drive can not stop motion of spindle? > if max rpm for tapping around 100 rpm , can drive stop spindle ? > it is possible to program for 70% or torque that actually will crash tap, > to have some safety. > aram Several things here. Rigid tapping is just that, no torque slip clutch as that would throw the spindle and tap out of sync. If you had a tension/compression tap holder you may get by with a slip clutch. If you are in doubt about your tap then simply tap shallow and finish by hand. Speed wise 100RPM is very slow. I tap up to 3/8 both cut and roll taps at 500 RPM, 5/8 taps go at 200 RPM for cut and 120 for roll form. Many smaller taps in Aluminum are spinning at 1000 RPM or more. If Fanuc, Siemens, Mazak, et al have not implemented torque limiting for taps I would guess that it is much more difficult than it looks. Ed. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] steppers
On Fri, 2012-01-13 at 10:09 -0700, Cathrine Hribar wrote: > if the steppers are wired in series, like I wired mine, > they would require twice as much current Having waded through this mess not too long ago, here's what I (think I) know... Putting the two halves of a single pole's winding in series doubles the number of turns, doubles the winding resistance, and increases the inductance by a factor of four. Doubling the turns doubles the magnetic flux density in the pole, which is easier to see with the old-school unit of Ampere-turn instead of the fancy-pants metric Gauss or Tesla. Because torque is proportional to magnetic flux, you should get twice the torque for the same current. Unfortunately, the armature will probably saturate because you're now running it at twice its design flux, which will kill the torque and perhaps the motor, too. That's not a desirable outcome, so, paradoxically, a motor rated at 2.8 A per winding should run at 1.4 A with two windings in series. The resistive power losses would double at the same current, but will go down by a factor of 2 at half that current. If the motor has enough magnetic headroom, you can reduce the current by 1/sqrt(2) to dissipate the same amount of power: 2.8 A * 0.707 = 2 A. The increased inductance increases the overall L/R rise time by a factor of 4, assuming the external circuit is supplying substantial resistance (as in antique L/5R DC drives with hulking power resistors). With modern current-limiting chopper drivers, however, the rise time depends mostly on the winding's internal resistance, which increases by a factor of 2, so the net L/R increases by a factor of only 4/2 = 2. So, with the series-wired windings connected to the same supply voltage, the current rise time doubles. If you were pushing the motor's upper speed limit, the torque will fall off because the current reaches the limit set by the driver much later in each microstep. In the worst case, it no longer reaches the limit at all. It's enough to make your (well, my) head spin... -- Ed http://softsolder.com -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] gEDA / Correcting for workpiece warpage.
On Thu, 2012-01-12 at 17:28 -0500, gene heskett wrote: > get another armload of 2 & 1/2" ring binders If you can stand to wait for a bit, I'll run off a booklet-sized version and send it to you. The printer uses bulk ink, I've finally got the restack orientation down to a reflex, and I have a comb binding machine. The booklet will be half-letter size, which is about what the old EAGLE manuals used to be, back in the day. Color, too, if the PDF has any. A 334 page manual will boil down to 84 letter-size sheets of paper, cut in half to make 168 half-size sheets, so it'll be maybe 3/4 inch thick. Thinner than the stack of EMC2 manuals everybody wanted to buy off me at Cabin Fever a year or so ago... Send me your mailing address and I'll get one off as soon as the CadSoft site recovers from the 6.0.0 -> 6.1.0 onslaught. Your payment: keep telling war stories that I can send to our Larval EE in up Rochester as examples of what she won't learn in the classroom. Deal? -- Ed http://softsolder.com -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Fri, 2011-12-30 at 16:33 -0500, Jim Coleman wrote: > how stable the voltage remains across a range of loads I really didn't measure that, but I think the core losses are just this side of terrible. After all, they used core saturation for output power control, so reducing losses probably wasn't particularly important. Some handwaving: It pushed 280 A into a 14 m-ohm load with 4.1 V at the lugs, which made the winding + terminal resistance 3 to 4 m-ohm. That's higher than I expected for four parallel #10 wires: 1 m-ohm/ft x 4 ft = 4 m-ohm each, so you'd expect 1 m-ohm total. Frankly, my measurement accuracy isn't up to the task and I'm ignoring core losses. Putting three of those #10 wires in series, rather than parallel, would give 15 V with maybe 10 m-ohm. You pull 75 A for 1 kW at 13.5 V, so the voltage would drop a bit under 1 V due to copper resistance. Add or subtract a turn or two for the right answer. It might come heartbreakingly close to working. > any reason this technique couldn't be used for higher voltages The original secondary had a bazillion turns of fine wire to stuff what, 4 kV or so into the magnetron. The catch would be winding the heavy wire you need at 1 V/turn: a dozen or so turns would be do-able, but much beyond that won't fit through the core windows. You could, I suppose, delaminate the transformer and start all over again, but that starts to resemble actual work. Also, the recycled Romex wire I used is, , suboptimal in a high-current transformer. I'm not sure you (well, I) could feed enamel (or whatever they use these days) insulation through the core windows without nicking it; the thick plastic insulation on that Romex gave me decent results with crude techniques. But, again, it'd probably come pretty close to working... -- Ed http://softsolder.com -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thu, 2011-12-29 at 21:14 -0500, gene heskett wrote: > pointers to the articles That was a series on transformers & triac triggering, with a resistance soldering setup as the McGuffin. CC doesn't put articles online (if you know where to look, go for April/June/August 2008), but I put up some notes a while ago; start at the first post and rummage through the next few days: http://softsolder.com/2010/09/07/resistance-soldering-gizmo-overview/ The transformer notes, complete with a B-H curve, may be most useful: http://softsolder.com/2010/09/08/resistance-soldering-transformer/ The triac trigger circuitry was *insanely* complex, because I wanted to show what happens during four-quadrant triggering with sub-cycle control. In real life, you'd just fire a triac driver for the entire heating pulse and be done with it. A while back, Eks forced me to take his homebrew water-cooled pulser built around a stack of hockey-puck transistors that he'd been using for EDM. All I need is a bulk supply behind the thing, a bit of Z axis control, and I could sink dies with the best of 'em... [sigh] -- Ed http://softsolder.com -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Wed, 2011-12-28 at 12:03 -0500, gene heskett wrote: > There are hall effect based ammeters A while back, I mooched a Tek Hall-effect current probe from my buddy Eks to take some interesting pix: http://softsolder.com/2011/06/20/stepper-sync-wheel-current-waveform-first-light/ http://softsolder.com/2011/06/27/stepper-motor-winding-current-rise-time/ The winding current stays within a skosh of the setpoint for each microstep, which the driver determines by applying the sine & cosine of the microstep (electrical) angle to the overall peak current setpoint. That may also contribute to the mystical 70% derating factor, because in full-step mode the driver (well, Allegro drivers, anyway) applies 1/sqrt(2) = 0.71 of the peak current setpoint to *each* winding. That keeps the overall motor power dissipation the same, but the total current into both windings is 2*(1/sqrt(2))*peak = 1.4*peak. Perhaps the person who first stated that factor, back in the dim past, forgot about the current in the *other* winding? While I was doing that, I managed to stoke a mechanical resonance that back-drove the winding current something awful: http://softsolder.com/2011/09/12/stepper-dynamometer-mechanical-resonance/ Keeps me off the streets at night... [grin] -- Ed http://softsolder.com -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Preview Plot - Clear
Florian Rist wrote: > Hi, > I don't know if there is a way to clear it automatically, but to clear it > manually you can click the icon in Axis that's looking like a brush. > > cu > Flo > Control-K is the quickest. -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Emc vs modern lcd monitors
On Sat, 2011-08-13 at 08:50 -0400, gene heskett wrote: > under the vesa driver on an ati x1650 video card I ran into something like that on a Foxconn dual-core Atom D520 box that I'm sliding under my Thing-O-Matic: the default video setup sent 1024x768 dots to a 1280x1024 monitor and didn't offer anything better. The gotcha lay inside the Ubuntu 11.04 monitor settings, wherein unchecking the "Show same thing on both monitors" box suddenly revealed a second monitor! The Atom board has bone-stock Intel graphics with (to the best of my knowledge) no second video output, but the second monitor config showed all the myriad resolutions supported by the actual display. So I turned off the first monitor, picked 1280x1024 for the second monitor, the LCD went *blink*, and it's now fine. BTSOOM. Dunno if that applies to the VESA driver atop an ATI board, but it's certainly worth checking. -- Ed http://softsolder.com -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepConf configuration | EMC conversion
On Mon, 2011-06-27 at 13:41 -0700, For Sale Sticker wrote: > 'leadscrew pitch' (do I just count the number of threads per inch?) It's barely possible that the leadscrew will have a multiple-start thread, making the linear-motion-per-turn higher than you'd expect from a simple count of the threads-per-inch number. Turn the leadscrew by hand and count the number of threads that vanish / appear at the edge of the stage for each turn: mark a thread, then watch it for one turn. If one thread vanishes / appears, then the leadscrew doesn't have a multiple-start thread. If it has a multi-start thread, then the stage will move more than the threads-per-inch by the number of thread starts. (The Z axis on my Thing-O-Matic has a four-start leadscrew, so I had to puzzle through this mess while figuring out the mechanics...) -- Ed http://softsolder.com -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Extrusion-based RP
On Mon, 2011-06-13 at 11:38 -0700, Mike Payson wrote: > has the benefits you want > along with the ease and low-cost that I demand Now *that* will be a wonder to behold! Looking forward to it, indeed... -- Ed http://softsolder.com -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Extrusion-based RP
On Sun, 2011-06-12 at 14:33 -0700, Mike Payson wrote: > a bit of a Makerbot champion The *idea* behind the Thing-O-Matic is great, but the *implementation*, well, not so much. Plus, all the things on the their wishlist seem to be done deals with EMC2, but I digress. > "ship it, then sell them an upgrade when they complain". Which is why I have trouble recommending that anybody buy a Thing-O-Matic: it costs about $2k by the time you get it gussied up with everything required to make it work the way they described it late last year when I bought it. That's ignoring the inconvenient fact that not everything you'd get actually works the way it should; it's still a shop project. > ARM chips are cheaper than an 8-bit ATMega *pumps fist* Yes! I had a ten-cent bet with myself that when everybody finally admitted that an Arduino couldn't handle the load, they'd step up to an ARM and start from scratch. > since those same points are true of the RepRap today with > the host software. Ah, but look at it a bit differently: A dual-core Foxconn Atom (with parallel port!) + 1 GB DDR2 + 80 GB SATA is $150 *retail* at Newegg, so it's under $70 OEM. Add a custom interface board with the stepper interface and an Arduino-class micro that handles the heaters / fans / thermocouples for maybe $50 OEM. You get a headless EMC2 system for $120 OEM that runs rings around a de novo ARM, particularly because you don't have to re-write all that motion control and UI code. Example: Want a higher-end 3D printer system with touch screens, keyboards, joysticks, whatever? Would you rather have this: http://www.makerbot.com/wp-content/uploads/2011/03/Interface_Text.jpg Or this: http://www.linuxcnc.org/docs/2.5/html/gui/touchy.html Given that a VGA-resolution 8-inch touch screen costs the same (admittedly, on eBay) as the MBI kit (modulo shipping), I think you see where I'm coming from. With EMC2, you just plug it in, load up the HAL code, and you've got a touch screen interface. Which printer UI would be an easier sell to the *next* 10,000 customers who aren't gearheads like us? Attracting their attention might be worth a hundred bucks right there... /rant [grin] -- Ed http://softsolder.com -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Extrusion-based RP
On Sat, 2011-06-11 at 23:54 -0700, Mike Payson wrote: > that is a limitation of the Makerbot firmware. As nearly as I can tell, ReplicatorG has become sufficiently intertwingled with the firmware that it's best to not stray too far from the beaten path, so I'll continue to use the 2.7 firmware until things settle down a bit. RepG 24 has 17 different drivers for various combinations of machines / firmware / configurations and it's not at all clear what works with what. I used to like being a beta tester, but I've gotten over it... > integrated MCU based driver The problem with that is economics: right now, the hardware cost for the microcontroller(s) and motherboards has run up against the cost of an ATX system board. In fact, the MBI retail price for the Ardino / Motherboard / Extruder Controller exceeds the full-up Atom I'm using with the Sherline. There's not all that much horsepower in an 8-bit microcontroller and the firmware is bumping up against those limits, too. I expect the next generation will use an ARM or some such, at the economics will definitely favor a commodity PC and a very cheap analog interface board; you need pretty much the same stepper drivers for either one. All the firmware does is eat G-Code and spit out parts; that's exactly what EMC2 does with my Sherline mill. I think it'd be a whole lot easier and less expensive to use EMC2 for motion control than to re-invent all those functions and jam them into an Arduino. Plus, you'd get a much better user interface, bigger displays, better keyboards, and a much more stable system for free. The fact that the "computer" inside the printer is a PC running EMC2, instead of a microcontroller running something else, is largely irrelevant. From the outside, you feed either printer with G-Code from Skeinforge it produces parts; the advantage of using EMC2 is that developers can concentrate on improving *printing* rather then reinventing motion control / UI wheels. I'd like to do it just to show how it works, but ... not right now. -- Ed http://softsolder.com -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Extrusion-based RP
On Sat, 2011-06-11 at 19:17 -0400, Colin K wrote: > you can make very complex geometries > without multiple setups or fixtures That's why I got a Thing-O-Matic: create near-net parts that don't need much finishing. This one came out perfectly: http://softsolder.com/2011/05/27/thing-o-matic-caliper-repair-perfection/ The parts have a rather hand-knitted aspect that doesn't matter for the things I build. Some close-ups: http://softsolder.com/2011/04/18/hbp-aluminum-build-plate-abs-film-win/ It's handy for cranking out one-off parts on short notice: http://softsolder.com/2011/06/11/stepper-motor-sync-wheel/ Fortunately, some parts really don't have any accuracy specs: http://softsolder.com/2011/06/02/thing-o-matic-graduation-day/ Being that sort of bear, I've tweaked / improved / rebuilt / replaced much of the printer's innards and now have something that works quite well. Other folks have had zero problems with the stock printer, so much of what I've done has been along the lines of "That doesn't seem quite right, I'd rather do it this way" rather than the rare "Dang, it's busted!" Like, for example, my experience with the stock stepper motors: http://softsolder.com/2011/05/05/thing-o-matic-mbi-stepper-motor-analysis/ It now produces good parts almost every time, although you must design parts with the printer's limitations in mind. The smallest feature will be a bit under 1 mm, you can put edges anywhere with resolution around 0.05 mm, it doesn't do steep overhangs very well at all, and the objects must fit in a more-or-less 100 mm cube. But you can print some truly odd things: http://softsolder.com/2011/05/02/what-would-barbie-pack/ The firmware doesn't apply acceleration limiting, which I regard as a major limitation on performance and dependability. I'd like to plug the motrors into EMC2 and whip up some HAL / ladder logic to control the extruder & temperatures, but I've reached my tinkering limit for a while. DIY 3D printing is *definitely* not a plug-and-play experience! If you have nothing better to do for a while, my blog's Thing-O-Matic category may be amusing... -- Ed http://softsolder.com -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Beating Grub2 into submission
On Sat, 2011-04-09 at 21:41 -0400, Kent A. Reed wrote: > Kudos, brickbats, big yawns, gleeful > nitpicking, all willingly accepted, Well, here's a heaping double handful of kudos from me! Your script bottles up a whole bunch of magic that I certainly couldn't have figured out on my own. Thanks... -- Ed http://softsolder.com -- Forrester Wave Report - Recovery time is now measured in hours and minutes not days. Key insights are discussed in the 2010 Forrester Wave Report as part of an in-depth evaluation of disaster recovery service providers. Forrester found the best-in-class provider in terms of services and vision. Read this report now! http://p.sf.net/sfu/ibm-webcastpromo ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Monitor and control my CNC through an IP camera ?
On Mon, 2011-04-11 at 09:51 -0700, Kirk Wallace wrote: > a page on the wiki covering the making of bellows. For those of us with Sherline mills and no flood coolant, plain old paper works surprisingly well. You don't form a deep emotional attachment to it, so throwing it out when it gets really crusty doesn't hurt at all... http://softsolder.com/2010/02/26/improved-sherline-way-bellows/ -- Ed http://softsolder.com -- Forrester Wave Report - Recovery time is now measured in hours and minutes not days. Key insights are discussed in the 2010 Forrester Wave Report as part of an in-depth evaluation of disaster recovery service providers. Forrester found the best-in-class provider in terms of services and vision. Read this report now! http://p.sf.net/sfu/ibm-webcastpromo ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
