Re: [Emc-users] Choice of CNC conversions

> On 26 Dec 2021, at 13:44, Mark wrote: > >> stallation or do a number of standard operations. > > Sure. As long as you can guarantee that every single machine manufactured, > designed, built in someones garage or basement will be identical to each and > every other machine out there. To

Re: [Emc-users] Choice of CNC conversions

On Sat, 25 Dec 2021 at 10:39, andrew beck wrote: > It needs a few things (mainly a jerk control algorithm). And tool > Management stuff. More work offsets etc. You might have missed: http://linuxcnc.org/docs/devel/html/tooldatabase/tooldatabase.html -- atp "A motorcycle is a bicycle with a

Re: [Emc-users] Choice of CNC conversions

> On 24 Dec 2021, at 10:46, Jérémie Tarot wrote: > > "my" idea along this line would be to develop/document > a set of "reference implementations" There are some case studies in the Wiki. However these are probably rather out of date and are probably not at the level you envisage.

Re: [Emc-users] Harmonic Drive

On Fri, 17 Dec 2021 at 15:27, Todd Zuercher wrote: > > Andy, Initially I thought what you are saying about the pitch diameters > needing to be the same was true. And that would be the case if all the > pinions had the same tooth count and size. But When I was modeling it I > found that if

Re: [Emc-users] Harmonic Drive

On Fri, 17 Dec 2021 at 08:06, John Dammeyer wrote: > Add the second though and there doesn't seem to be any clear position where > the second just drops down onto the secondary planet gears. It's always a > force fit. Either there's a key where it can go together just so perfectly > or it's

Re: [Emc-users] Harmonic Drive

On Thu, 16 Dec 2021 at 07:57, John Dammeyer wrote: > The AlibreCAM Gear generator doesn't accept module. Instead it wants number > of teeth and pitch diameter. > So I whipped up a spreadsheet that converts say the module 1.25 that Todd > used and chose 19 teeth for the sun gear. That appears

Re: [Emc-users] Linuxcnc-config for H-Bot machine

On Tue, 14 Dec 2021 at 19:29, Joop Goedbloed wrote: > Is there a linuxcnc-config for H-BOT machine with 2 steppers or is there > additional hardware necessary. There is support for core-xy: http://linuxcnc.org/docs/2.8/html/man/man9/kins.9.html I don't see direct support for H-bot. (But I

Re: [Emc-users] making post square.

> On 12 Dec 2021, at 19:55, Chris Albertson wrote: > > I'm surprised that people don't use kinematics to remove the residual > alignment errors There is millions: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ContributedComponents ___ Emc-users

Re: [Emc-users] making post square.

> On 12 Dec 2021, at 17:40, Gene Heskett wrote: > > Is joint.N.cmd-pos the stable value I need? It might be motor-pos-cmd. I am not at home at the moment to test. Is the problem that the column is not square to the table top surface or not square to the Y or X slides?

Re: [Emc-users] Harmonic Drive

> On 2 Dec 2021, at 21:14, Todd Zuercher wrote: > > What if you used two outer ring gears of the same diameter one with one > fewer teeth. Then have 4 sets of planetaries stacked in pairs. Each pair > would be pinned together You can just use pinions twice as long as the ring gears. I

Re: [Emc-users] Harmonic Drive

On Tue, 30 Nov 2021 at 23:07, Stuart Stevenson wrote: > Is the tooth shape an attempt to mesh in an involute fashion? No, because the motion of the teeth relative to each other is very much unlike meshing gears, and so involute is inappropriate. -- atp "A motorcycle is a bicycle with a

Re: [Emc-users] Harmonic Drive

On Tue, 30 Nov 2021 at 21:43, John Dammeyer wrote: > Do you have a similar sized micrograph of the mating profile? Sorry, no, that's a lot harder to photograph. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses,

Re: [Emc-users] Harmonic Drive

On Tue, 30 Nov 2021 at 20:30, John Dammeyer wrote: > > I want to look at the tooth shape. This is a micrograph of the flexspline of my broken HD drive. https://photos.app.goo.gl/mmJdebQD1QY538xY6 This part of their web site makes a thing about the "S" shape of the teeth, and has a little

Re: [Emc-users] Harmonic Drive

On Mon, 29 Nov 2021 at 10:02, John Dammeyer wrote: > From my perspective most of the bearings in the cup based are effectively > useless I think that the commercial design (with a single oval bearing) probably controls the shape of the cup better, for an overall stiffer result. It feels a bit

Re: [Emc-users] Harmonic Drive

> On 28 Nov 2021, at 04:44, John Dammeyer wrote: > > And look at creating the flex part from steel since I have gear cutters and > an arbor. The ideal profile is not an involute. There is a sketch of it somewhere in the HD website. ___

Re: [Emc-users] Spindle positioning.

On Wed, 24 Nov 2021 at 09:58, John Dammeyer wrote: > How does one tell the spindle to do one revolution at 0.5 rps and stop either > after one rev or when a sensor input is detected? Given that I'm running the > MESA board in step/dir mode. Presumably it is running in velocity mode? Use a

Re: [Emc-users] Spindle positioning.

On Tue, 23 Nov 2021 at 01:05, John Dammeyer wrote: > Likely why the set screw works loose after a number of cycles. I am surprised that the air wrench doesn't have the usual ball-detente to retain the socket. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed

Re: [Emc-users] Spindle positioning.

On Mon, 22 Nov 2021 at 08:03, John Dammeyer wrote: > One still has to line up the socket to the hex head of the drawbar. And > since it can be at any position relative to the spindle the sensing has to > happen against the hex head. Rotate spindle until hex head is at a known > position.

Re: [Emc-users] Closed loop control of air motors.

On Mon, 22 Nov 2021 at 05:23, John Dammeyer wrote: > As it is the nut is getting pretty trashed so until the 12 point socket > arrives I think this part of the project is on hold. Is it time to cut your losses and go with a Bellville washer stack? It works for Tormach:

Re: [Emc-users] Closed loop control of air motors.

On Sun, 21 Nov 2021 at 07:45, John Dammeyer wrote: > > I'd like to be able to limit the number of turns to 2. OK, here is a possible arrangement that will fit in the existing packaging. Press a sleeve onto the outside of the socket with a spiral groove machined into it (actually two grooves, a

Re: [Emc-users] Closed loop control of air motors.

On Sun, 21 Nov 2021 at 07:45, John Dammeyer wrote: > In order to not have both the TTS and R8 collet drop out of the spindle I'd > like to be able to limit the number of turns to 2. How about an end-stop in the draw bar? It would be fairly easy to have something that simply "catches" the

Re: [Emc-users] LinuxCNC with Robot Arm Setup

> On 18 Nov 2021, at 17:51, Chris Albertson wrote: > > In the case of a robot arm you need to send (x, y, z, w, x, y) where w, x, > y are rotational orientation. LinuxCNC would normally use xyzabc. Using x and y twice would confuse it. ___

Re: [Emc-users] LinuxCNC with Robot Arm Setup

On Thu, 18 Nov 2021 at 02:48, Ian Charnas wrote: > I am indeed planning on using computer vision to set targets for the robot > arm to move to. As a first stage this can be done using only whatever vision system you use and LinuxCNC. It is easy enough to send an "MDI" command to LinuxCNC that

Re: [Emc-users] LinuxCNC with Robot Arm Setup

On Wed, 17 Nov 2021 at 05:12, Ian Charnas wrote: > My first question: am I heading down a wise path or are there other > better options that I'm unaware of? I think that is a reasonable approach. You might want to think about whether you want to use genserkins or pumpkins, or some other option.

Re: [Emc-users] Power Drawbar progress

On Wed, 17 Nov 2021 at 01:50, John Dammeyer wrote: > Might want some rubber stops to absorb some of the shock. Some cylinders have an air cushion built-in (basically the piston covers the port like a 2-stroke engine) But the usual way to slow things down is with a needle valve in the line.

Re: [Emc-users] Touch Probe

On Tue, 16 Nov 2021 at 12:31, Matthew Herd wrote: > > Is there a provision for tool setting a face mill or a tool with a different > center height than the outside diameter? I think that you could probably do something clever with U/V offsets in the tool table. -- atp "A motorcycle is a

Re: [Emc-users] USB to Ethernet

On Tue, 16 Nov 2021 at 07:21, John Dammeyer wrote: > > Would this type of USB 3.0 to Ethernet work with Ethernet supported MESA > boards? I doubt it. I think that the underlying reasons why LinuxCNC does not support USB would still apply. (ie USB is generally buffered and the standard allows

Re: [Emc-users] Project Progress

On Thu, 4 Nov 2021 at 21:34, John Dammeyer wrote: > > The backlash removal will be a major project. Maybe https://www.denfordata.com/bb/viewtopic.php?t=3727 Or possibly: https://photos.app.goo.gl/72BgoRiKeGmQqDHs9 There is a GTEN RSH ballnut in there. They are rather slim but have an external

Re: [Emc-users] Project Progress

On Thu, 4 Nov 2021 at 06:36, John Dammeyer wrote: > My mill does have a coolant pump but I don't know if I use the mill often > enough to fill the reservoir with coolant that then goes mouldy and stinky. Just get modern coolant. I probably don't even use my mill ever month, and the coolant in

Re: [Emc-users] Prox sensors and wiring

On Thu, 4 Nov 2021 at 06:30, John Dammeyer wrote: > As for connectors, I'd solder and heat shrink to cables if they weren't long > enough to reach the cabinet. You can get glue-lined heat-shrink for a truly watertight joint. I bring the prox leads back to a watertight junction box, and in the

Re: [Emc-users] Mesa 7i90 as remote sserial

On Fri, 29 Oct 2021 at 04:40, Ralph Stirling wrote: > > Am I once again trying for something untested? > Is it possible to use a 7i90hd as a high speed > sserial remote (2.5Mb, not the 115kb) with > configurations other than straight gpio? From the LinuxCNC side, if it works as a sserial device

Re: [Emc-users] Tracking G-Code subroutines

On Wed, 27 Oct 2021 at 08:36, John Dammeyer wrote: > > we don't actually see the calculated parameters from say the G53 lines nor > whether it fails and the M71 is run. Have you tried adding debug lines ot the subroutine? (DEBUG, G53 G0 Z #<_ini[AXIS_Z]MAX_LIMIT> +

Re: [Emc-users] 1973 cnc retro tech.. How to switch between metric and English

On Tue, 26 Oct 2021 at 13:47, Eric Keller wrote: > > I wanted to modify my lathe to cut metric threads. But it requires 7 > gears. Have you considered a full CNC conversion? It makes cutting threads up to shoulders in blind holes a lot less frightening :-) -- atp "A motorcycle is a bicycle

Re: [Emc-users] 1973 cnc retro tech.. How to switch between metric and English

On Tue, 26 Oct 2021 at 03:03, Sam Sokolik wrote: > Amazing how it was cheaper to do this in hardware than in the > control (ttl ic's) I do hope you are retaining this madness? -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical

Re: [Emc-users] Probing

On Sun, 24 Oct 2021 at 08:02, John Dammeyer wrote: > > Is anyone using > https://github.com/verser-git/probe_screen_v2 > > Any comments about it? About 50 pages of comments here: https://forum.linuxcnc.org/49-basic-configuration/29187-work-with-probe?start=0 Verser also sells relatively

Re: [Emc-users] Work Coordinate Editor?

On Thu, 21 Oct 2021 at 16:28, Todd Zuercher wrote: > > How hard would it be to add an editor to Linuxcnc (specifically for the Axis > ui) for displaying and editing the work coordinate offsets directly? > Something similar to the tool table editor, where you can view and edit all > of the

Re: [Emc-users] How to get Glade editor?

On Wed, 20 Oct 2021 at 12:56, andy pugh wrote: > I think you start it with the command "glade". But it might be glade-3 > for extra confusion. At home now, and have tested it. glade-3 -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed

Re: [Emc-users] How to update 7i71 firmware

On Wed, 20 Oct 2021 at 18:35, Viesturs Lācis wrote: > Or do I have to run ssinstall script before that (with "sudo > ./ssinstall") to get the firmware files in correct places? You can also do it with this HAL utility. But the Mesa script is probably easier:

Re: [Emc-users] How to get Glade editor?

On Mon, 18 Oct 2021 at 17:18, Thomas J Powderly wrote: > you can get a special newer, but not newest glade-3 installed The glade-gtk2 binary on the LinuxCNC repository is Glade-3. It's the right one to use. I think you start it with the command "glade". But it might be glade-3 for extra

Re: [Emc-users] Shortening motor shafts

On Mon, 18 Oct 2021 at 06:12, Ralph Stirling wrote: > > I need shorten the 32mm long 19mm diam shafts by 5mm. Lots of good ideas, here are some less-preferred options: Find a way to power the motor on top of your lathe or milling machine ways, and turn the shaft down. It is possible to

Re: [Emc-users] Fwd: Rogue Index Pulses

On Wed, 13 Oct 2021 at 12:49, Peter Hodgson wrote: > > They look nice. Which one do you usualy turn to? The Tek is on the shelf above my workbench, plugged in and with the probes hooked up, so that one. > https://banggood.app.link/a2038i0Ujkb Or this, on next-day with no worries about import

Re: [Emc-users] armbian buster glade-3 python-gtksourceview2 worth pursuing?

On Wed, 13 Oct 2021 at 12:59, Thomas J Powderly wrote: > I got quite lost and was never able to add the keys. You can just grab the .deb file by hand, then install it with gdebi, dpkg or (my normal way) with apt-get. sudo apt-get ./name-of-deb-file The ./ is a clue to apt that it should look

Re: [Emc-users] Fwd: Rogue Index Pulses

On Wed, 13 Oct 2021 at 11:35, Peter Hodgson wrote: > > Thanks Andy, that's good info and will temper my expectations. > > I'll see what comes along. FWIW I have two, a rather cute little Tektronix (with character generation on the CRT) dating from the 1980s: https://w140.com/tekwiki/wiki/336 And

Re: [Emc-users] Fwd: Rogue Index Pulses

On Wed, 13 Oct 2021 at 11:13, Peter Hodgson wrote: > I'm watching a couple of Oscilloscopes on eBay so might take the plunge. I am going to go against the consensus and suggest that if you don't already have an oscilloscope, and don't know how to use one, then you might not find it much help.

Re: [Emc-users] armbian buster glade-3 python-gtksourceview2 worth pursuing?

On Wed, 13 Oct 2021 at 06:06, Thomas J Powderly wrote: > import gtksourceview2 as gtksourceview > > No module named gtksourceview2 For x86 and armhf we have back-ported Gtksourcevew: http://www.linuxcnc.org/dists/buster/base/binary-armhf/ (python-htksourceview) Which linuxcnc repository is

Re: [Emc-users] Replacing a handle.

On Wed, 13 Oct 2021 at 04:36, John Dammeyer wrote: > I can't figure out how I'd hold the raw stock to machine it. I would think in terms of machining one face, then making a pocket in some other stock, hot-glueing the handle in the pocket (machined face down) and then finishing. I did that

Re: [Emc-users] halshow:watch doesn't

On Tue, 12 Oct 2021 at 14:36, Gene Heskett wrote: > my.halshow was originally created by nano, subsequently verified by > geany, and cat, according to an ls -l, has normal I own it perms. It has the wrong format. Here is the contents of the file created by "save (multiline)" in the file menu:

Re: [Emc-users] halshow:watch doesn't

On Tue, 12 Oct 2021 at 03:23, Gene Heskett wrote: > But not on this mornings master from the buildbot. If you start from the command line, is anything logged when you open the my.halshow? Is the my.halshow a file saved from halshow, or one you edited by hand? -- atp "A motorcycle is a

Re: [Emc-users] Fwd: Rogue Index Pulses

On Mon, 11 Oct 2021 at 22:34, Peter Hodgson wrote: > Interestingly, I noticed that the earth cable coming from the spindle VFD > screen made the encoder signal extremely noisy when it was in close proximity > to the encoder cable. Ah, yes, VFDs can make a lot of noise in the electrical

Re: [Emc-users] halshow:watch doesn't

On Mon, 11 Oct 2021 at 22:54, andy pugh wrote: > Is this a problem in Master? It works in 2.8. ...And with a freshly-compiled master. Are you sure that the pins to be watched exist at the point that you are loading the my.halshow? -- atp "A motorcycle is a bicycle with a pan

Re: [Emc-users] halshow:watch doesn't

On Sun, 10 Oct 2021 at 01:55, Gene Heskett wrote: > > Anything else I need to make it work? Is this a problem in Master? It works in 2.8. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." —

Re: [Emc-users] M6 remap brings "zero timeout with wait type != immediate return"

On Fri, 8 Oct 2021 at 09:33, Viesturs Lācis wrote: > > I have narrowed it down to this: > If I comment out all M66 lines, on startup I get "unknown operation" i think that these lines might be illegal: o101 else (MSG, Pocket 1 is not empty) ie, an if / else with something else on the same line

Re: [Emc-users] Connect IN/OUT but not IO

On Sun, 3 Oct 2021 at 17:46, Nicklas SB Karlsson wrote: > > In hal file connect in or out work as expected but are uncertion how to use > io pins? For historical (and bad) reasons quite a lot of pins are IO for no good reason (for example, encoder.N.position-scale and ..counter-mode). You can

Re: [Emc-users] Mesa card hook up.

On Sat, 2 Oct 2021 at 06:03, andrew beck wrote: > > Hey everyone (especially Pcw) > > > I have 7i92m 7i77 7i71 7i84 cards > > plus a 7i74 if I need it. > I just trying to work out how to connect up the cards. Computer -(ethernet)- 7i92 -(DB25 pins)- 7i77 Then one smart-serial device can be

Re: [Emc-users] jogaxisget.comp usage?

On Thu, 30 Sept 2021 at 02:06, Gene Heskett wrote: > Is there such a doc? URL? If you compiled it then it should have created a manpage. man jogaxis -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and

Re: [Emc-users] SPI sub-driver for hostmot2

On Tue, 14 Sept 2021 at 20:39, John Figie wrote: > I see that there was some work proposed for a SPI sub-driver for hostmot2 > but > maybe not much has changed since this was added to the wiki. You probably need to write

Re: [Emc-users] LinuxCNC 2.8.0 upgrade

On Mon, 27 Sept 2021 at 17:18, Alan Condit wrote: > Seb replied direct to me and I did get updated with "sudo apt update" and > "sudo apt upgrade”. However, I > generally prefer Synaptic, so thank you for helping with synaptic. It might be as easy as pressing the "reload" button in Synaptic.

Re: [Emc-users] LinuxCNC 2.8.0 upgrade

On Sun, 26 Sept 2021 at 15:03, Alan Condit wrote: > > I tried to upgrade my LinuxCNC 2.8.0 on my lathe but Synaptic reported that > 2.8.0 is the latest version. > The downloads page of the website shows 2.8.2 is the current version. What do you have in Synaptic Settings->Repositories? --

Re: [Emc-users] Safely Upgrading LinuxCNC

On Wed, 15 Sept 2021 at 23:13, John Dammeyer wrote: > > So the upgrade document needs a bit of work with some guidance on what needs > to be removed in order for this to work. I thought that "Delete or un-check all the old linuxcnc.org entries (leave all non-linuxcnc.org lines as they are)."

Re: [Emc-users] Safely Upgrading LinuxCNC

> On 15 Sep 2021, at 20:08, johnd wrote: > > On which list? The one where I added 2.8? In e synaptic repository list you appear to have 6 LinuxCNC entries. You should have one deb and one deb-src (optional) ___ Emc-users mailing list

Re: [Emc-users] Safely Upgrading LinuxCNC

> On 15 Sep 2021, at 19:10, John Dammeyer wrote: > > Kind of odd behaviour now that 2.8 is in the list. I can no longer select it > for installation. It looks like you have several other LinuxCNC sources in the list. Delete those and then refresh. (Ie only keep the 2.8 ones)

Re: [Emc-users] Safely Upgrading LinuxCNC

> On 15 Sep 2021, at 10:20, John Dammeyer wrote: > > Still 2.7.14 What does Synaptic show as the version and available versions? ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Safely Upgrading LinuxCNC

> On 14 Sep 2021, at 23:41, John Dammeyer wrote: > > Short of installing the OS and LinuxCNC all over again as if it were a clean > hard drive is there a way to update the OS and LinuxCNC without losing > everything that's on the hard drive? It should be easy. You simply need to change

Re: [Emc-users] Suggestions for a retrofit.

> On 14 Sep 2021, at 22:04, John Figie wrote: > > so I am wondering how one would go about > configuring LinuxCNC for the STMBL. It’s surprisingly simple at the HAL end: https://github.com/rene-dev/stmbl/blob/master/docs/linuxcnc/stmbl.hal ___

Re: [Emc-users] Debugging Python under LinuxCNC

On Tue, 14 Sept 2021 at 19:09, John Dammeyer wrote: > I'm more used to working with program development systems that have > breakpoints, allow single stepping through assembly code and examining > variable values and even processor registers. You can do that in Python.

Re: [Emc-users] Spindle setup for 5i25/7i76

On Mon, 13 Sept 2021 at 22:54, Alan Condit wrote: > I have the Cycletrol-150 Manual. It says that you can replace the 5k ohm > potentiometer with a 0-10v analog signal. The 7i76 manual says that you can > use it to replace a 5k potentiometer control (0-10v). So that should work and > indeed

Re: [Emc-users] Debugging Python under LinuxCNC

On Mon, 13 Sept 2021 at 21:49, John Dammeyer wrote: > If I add print() statements where would they show up? Or would they at all? In the terminal, if you start LinuxCNC from the command line. Otherwise I fear that they might simply get lost. -- atp "A motorcycle is a bicycle with a

Re: [Emc-users] Serial Port access

On Thu, 9 Sept 2021 at 05:31, John Dammeyer wrote: > I've been reading > http://linuxcnc.org/docs/2.4/html/hal_comp.html For this application I think that a Pyhon userspace component using Pyserial is probably the easier approach. http://linuxcnc.org/docs/2.8/html/hal/halmodule.html -- atp

Re: [Emc-users] Subroutine error about duplicate O-word label

> On 6 Sep 2021, at 22:55, Viesturs Lācis wrote: > > Is there a way to reverse the direction? I tried playing with Z and R > values, but got only error message that R has to be larger than Z. It might be worth looking in the code for the error message to see if there is any condition around

Re: [Emc-users] Subroutine error about duplicate O-word label

> On 5 Sep 2021, at 14:32, Viesturs Lācis wrote: > > I do not > know, if canned cycles, like G81 work in XZ and YZ plane, but I feel > pretty sure that they would not work both directions I think that both can work, actually. Probably worth experimenting in a sim.

[Emc-users] Rigid tapping with geared encoder

I have just advised someone on the forum that he needs a 1ppr index to rigid tap, as his encoder is mounted to the motor, not to the spindle. But then I started wondering if this is technically correct. I have a feeling that single=pass rigid tapping will be fine, but mutli-pass won't work? Has

Re: [Emc-users] jerk control

> On 29 Aug 2021, at 11:40, Alexander Brock wrote: > > The idea can be implemented in C and for simple cases like 1D funktions > it should be fairly straight-forward. My point is that the kinematics modules already exist, and not all of them are under our control. Various users’ machines

Re: [Emc-users] jerk control

>> It will require jerk limiting to really get the value out of the machine. There is a jerk-limiting component in the forum https://forum.linuxcnc.org/47-hal-examples/43401-hal-s-curve-component-for-download-loadrt-dofs-x It sacrifices path accuracy for jerk limitation (or so I assume) but

Re: [Emc-users] New zero backlash gearbox

On Fri, 27 Aug 2021 at 00:42, Leonardo Marsaglia wrote: > > Really nice. Looks similar to a harmonic drive but more complicated. It > would be awesome to see what are the advantages of these over harmonic > drives. It looks a lot stronger. -- atp "A motorcycle is a bicycle with a pandemonium

Re: [Emc-users] jerk control

On Thu, 26 Aug 2021 at 00:34, Alexander Brock wrote: > There is an elegant way to compute exact derivatives without computing > analytical derivatives by hand. Here is a nice introduction: Is that applicable to the LinuxCNC kinematics functions? (Which are kernel modules written in C). -- atp

Re: [Emc-users] jerk control

On Tue, 24 Aug 2021 at 01:54, andrew beck wrote: > > Andy do you know what the tormach uses for more than 3 axis path blending? It's an extension to the circular arc interpolation that went in to the "new" LinuxCNC TP at 2.7. -- atp "A motorcycle is a bicycle with a pandemonium attachment and

Re: [Emc-users] jerk control

On Mon, 23 Aug 2021 at 21:27, andrew beck wrote: > > Just had a look at tiny g looks great. I did try to implement a zero look-ahead finite jerk planner for laser rastering. It was interesting, and I learned a bit. It is easier the less general you make it. Ideally LinuxCNC would have a 9-axis

Re: [Emc-users] jerk control

On Mon, 23 Aug 2021 at 04:40, Chris Albertson wrote: > Actually for a machine tool, why not run the > simulation off-line and use as much time and computer power as it takes. Feed-override? Do you allow infinite jerk on abort? You might think that is an easy question, except that continuous

Re: [Emc-users] splicing teeny wires

On Fri, 20 Aug 2021 at 16:43, Gene Heskett wrote: > > Too many times the heat shrink has slid off. You can get heat-shrink with hot-melt glue inside. That doesn't slide off. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical

Re: [Emc-users] splicing teeny wires

On Fri, 20 Aug 2021 at 14:53, Gene Heskett wrote: > If you know of an even smaller splice, and the tool for it, I'd sure > appreciate being advised. When space is tight I use solder and heat-shrink. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the

Re: [Emc-users] Just a little rigid Tapping Clip. With peck tapping

On Tue, 10 Aug 2021 at 01:19, andrew beck wrote: ] > If I somehow work out how to know if g33.1 (rigid Tapping is active) I thought that it was indicated by motion.motion-type, but it seems not: http://linuxcnc.org/docs/2.8/html/man/man9/motion.9.html#MOTION%20PINS > export that to a python

Re: [Emc-users] I may help you

On Tue, 3 Aug 2021 at 14:25, Laurent DEVAUX wrote: > > Ok, How can I do that, please ? It's the first time for me. The documentation is written in a markup language called "asciidoc" and it is designed to be human-readable. This raw text:

Re: [Emc-users] I may help you

On Tue, 3 Aug 2021 at 14:04, Laurent DEVAUX wrote: > I like very much LinuxCNC and I use it on my personnal mill. > I'm not able to help you into programming but I can do it into translation > (US -> FR). It would be very helpful if you could update some of the existing translations. Most

Re: [Emc-users] Something went wrong.

On Tue, 3 Aug 2021 at 07:58, wrote: > I draw all this from my own ballscrew conversion of my own mill, some 20 > years ago. If I was doing it again, I would use two nuts, with spring > tension between the pair Springs might not be the best way. The common way to tension double nuts is to

Re: [Emc-users] Something went wrong.

On Mon, 2 Aug 2021 at 03:28, John Dammeyer wrote: > > The milling operation was set up to always be climb milling. Zero point for > the center hole and the outside perimeter was the same. Was the same tool used for both profiles? -- atp "A motorcycle is a bicycle with a pandemonium

[Emc-users] Nice LinuxCNC Deckel Mill looking for a home (UK)

Seen on eBay: https://www.ebay.co.uk/itm/164985626295 In fact, very nearly bought from eBay, but I have regretfully concluded that I have nowhere to put it. It's an interesting design where the table is completely static and the column slides across the back. (Not a unique idea, the Asquith and

Re: [Emc-users] Lathe Spindle Drive Questions

On Thu, 29 Jul 2021 at 17:58, Chris Albertson wrote: > The way to deal with inrush today is to use a thermistor on the > high-current side of the transformer. They start to become hard to spec when you are working with steady-state power input of a few kW, though. I tried to use one for my

Re: [Emc-users] Metallurgical Advice?

On Thu, 29 Jul 2021 at 03:02, Gregg Eshelman via Emc-users wrote: > > Use Devcon Titanium Putty to bond the crack edges together I think that it would be best not to put anything in the crack, as doing so almost guarantees that the edges can't close together to where they were. -- atp "A

Re: [Emc-users] Metallurgical Advice?

On Wed, 28 Jul 2021 at 19:25, Milosz K. wrote: > Lock-N-Stitch pins are also another option. Advantage is it's a cold > process, but it's rather slow. I forgot to say, this does seem like an avenue worth exploring. Especially as the part is already conveniently mounted under a router spindle.

Re: [Emc-users] Metallurgical Advice?

On Wed, 28 Jul 2021 at 19:25, Milosz K. wrote: > > Brazing with Aluminum Bronze would be the preferable alternative to welding. That's good on cast iron. I don't know that it works on aluminium? -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial

Re: [Emc-users] Lathe Spindle Drive Questions

On Wed, 28 Jul 2021 at 19:20, Gene Heskett wrote: > Since that motor is shown with a max field current of 3 amps, I think that was the drive current. Motor current seems to be rather lower, 0.64A -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial

Re: [Emc-users] Metallurgical Advice?

On Wed, 28 Jul 2021 at 18:28, Todd Zuercher wrote: > Is there any hope of repairing the table? Are we going to have to replace > the whole table? Could the crack be welded, or is that a bad idea? It's probably a bad idea, but I would think that it is worth at least a try. You don't have a

Re: [Emc-users] Lathe Spindle Drive Questions

On Wed, 28 Jul 2021 at 18:00, Earl Weaver wrote: > I have noticed if the main power disconnect switch is let on the machine > for a length of time, the motor will feel hot to the touch. > Is this normal? Yes, if the field windings are permanently powered on. The motor rating plate says that the

Re: [Emc-users] Lathe Spindle Drive Questions

On Wed, 28 Jul 2021 at 00:46, Gene Heskett wrote: > > Yes, this is an approx. 1984 machine. > > That new? I would have guessed 1934, the year I was born. That means of > making a variable speed motor is ancient tech because its not very > efficient. I think you are maybe thinking of the Ward

Re: [Emc-users] Lathe Spindle Drive Questions

On Tue, 27 Jul 2021 at 21:13, Earl Weaver wrote: > Yes, this is an approx. 1984 machine. It won't have Selenium rectifiers then. Though I concur that the bus capacitors are very unlikely to be anywhere near spec by now. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is

Re: [Emc-users] Lathe Spindle Drive Questions

On Tue, 27 Jul 2021 at 14:10, Earl Weaver wrote: > > Here's a link to motor nameplate, drive info etc. > https://www.dropbox.com/sh/8k6ss8tfbfl4muj/AACFFFxQLOsuvu04vPmuK21Ta?dl=0 I skimmed the drive manual looking for any info on tuning the velocity loop, but could ne see anything. However: Are

Re: [Emc-users] Lathe Spindle Drive Questions

On Tue, 27 Jul 2021 at 14:10, Earl Weaver wrote: > Would there be a benefit for me to change the motor pulley to a smaller > size? I think that would depend on your planned use. My lathe can do 3000rpm but the macros I use with constant surface speed top out at 1500rpm and I very, very, rarely

Re: [Emc-users] Lathe Spindle Drive Questions

On Tue, 27 Jul 2021 at 12:41, Gene Heskett wrote: > > The only way to make the spindle feel "stiff" in your test would be to > > close the position loop with the encoder, but then how do you drive it > > as a spindle with a speed command? > > With a honking big power supply, and a high

Re: [Emc-users] Lathe Spindle Drive Questions

On Tue, 27 Jul 2021 at 00:13, Sam Sokolik wrote: > > Is there a reduction? What is the rated rpm? I have a cunning plan for a simple electronically-controlled 2-speed drive for this sort of application. The idea is to use both a one-way clutch/bearing and a vehicle air-conditioning clutch.

Re: [Emc-users] Lathe Spindle Drive Questions

On Mon, 26 Jul 2021 at 23:55, Earl Weaver wrote: > I have a lathe spindle with 8 in. chuck that is run with a 5HP Reliance > DC Motor and Reliance DC Drive. What kind of DC motor is this? Is it a permanent-magnet servo motor? Typically DC motors perform better at lower speeds than an AC

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