Re: [Emc-users] sweet little lathe

Stuart Stevenson wrote: > Gentlemen, > The price is right (right now). This auction has two days left. I am sure > the price will go up but I don't know how much. > > For your consideration > http://www.go-dove.com/en/event-17197/lot-3001/Servo-Products-Hardinge-M-8001-CNC-Mini-Lathe > > YIKES

Re: [Emc-users] 5 micron linear scales good enough to replace servo encoders?

Gregg Eshelman wrote: > Would a 0.0002" or 0.5" resolution linear magnetic scale be good enough > to use instead of a servo encoder? > > Still trying to get the guy with the Acra mill in need of a bunch of TLC to > sell it for what it's worth as-is, not for what it'd be worth if it was in >

Re: [Emc-users] 5 micron linear scales good enough to replace servo encoders?

andy pugh wrote: > Is there any reason LinuxCNC couldn't use tachometers and glass scales? > > If the tachos go direct to velocity-mode drives then LinuxCNC doesn't > even need to know about them. But there is no fundamental reason why > LinuxCNC can't run a separate velocity loop and position loop

Re: [Emc-users] Converting a ProTrak 15020?

Ron Bean wrote: > We have a Bridgeport mill with an old ProTrak 15020 2-axis CNC system > You've already reported the motors have brushes. You need to see what they are driving them with, and see if they appear to still be serviceable. If the servo amps are industry-compatible, they would take

Re: [Emc-users] "Black BeagleBoard: available at $45" (was LinuxCNC would be very nice on the UDOO board.)

Matt Shaver wrote: > P.S. I'm hedging my Raspberry Pi bet. I still like the Pi+FPGA approach > because of the higher performance possibilities, likely ease of > Mesa product integration, and the fact that they've made over a million > RPi boards. Beagle Boards/Bones have always had those "nice if y

Re: [Emc-users] LinuxCNC would be very nice on the UDOO board.

Greg Bernard wrote: > Haven't heard from Jon Elson > here as to his progress with the Beagle. He's had a solution for a > parallel port worked out in anticipation of a real time kernel. I prototyped an EPP parallel port emulator and got it running far enough to run simple test

Re: [Emc-users] "Black BeagleBoard: available at $45" (was LinuxCNC would be very nice on the UDOO board.)

Ralph Stirling wrote: > One show stopper I found with the RPi was the high probability > of SD card corruption during power cycles (power failure without > full OS shutdown first). Is the BeagleBone Black immune to this > problem? The quoted ten second shutdown is good, but I'd like > to have the

Re: [Emc-users] LinuxCNC would be very nice on the UDOO board.

Matt Shaver wrote: > On Mon, 22 Apr 2013 21:19:19 -0500 > Jon Elson wrote: > > >> I sent one of these EPP >> emulator/converters to Dale Grover, I think it ended up with Matt >> Shaver. >> > > Nope, I think Dale's still got it. I was disc

Re: [Emc-users] "Black BeagleBoard: available at $45" (was LinuxCNC would be very nice on the UDOO board.)

Jon Elson wrote: > Ralph Stirling wrote: > >> One show stopper I found with the RPi was the high probability >> of SD card corruption during power cycles (power failure without >> full OS shutdown first). Is the BeagleBone Black immune to this >> problem? The

Re: [Emc-users] "Black BeagleBoard: available at $45" (was LinuxCNC would be very nice on the UDOO board.)

Kent A. Reed wrote: > I wonder if the built-in flash memory of the new > BeagleBone Black can have this problem too? That would be a nasty surprise. > Yeah, this really made my ears perk up, too, with all the talk about failed SD cards. If these on-board memories suffer the same problem, they

Re: [Emc-users] off topic opinions

kqt4a...@gmail.com wrote: > I am lookin at http://www.smithy.com/midas/pricing/xl > I am a machinist virgin so it will be my first > It will be strickly for hobby and entertainment > Is there anyone with an opinion :) > > Arrgh! A 3-in-1 machine. We have one at work, it is a very mediocre lath

[Emc-users] Siig parallel port cards ?

A customer sent me his whole computer to see if I could get his PPMC board set to work with it. I found a timing glitch with his motherboard parallel port, and got it working by updating firmware on one of the PPMC boards. But, he also had a Siig parallel port card, and I could not get this to do

Re: [Emc-users] Siig parallel port cards ?

Jon Elson wrote: > > But, he also had a Siig parallel port card, and I could not > get this to do anything at all. I can't even get signals to > wiggle when observing with a scope. > Well, I must have locked it up with an EPP timeout or something. This morning I fired it

Re: [Emc-users] Siig parallel port cards ?

Lars Andersson wrote: > >> Jon Elson wrote: >> except that the extended control reg. to set it to EPP mode was at a >> different address than the customary base address + 0x402. >> > I would be interested in what actual address you found. > The un

Re: [Emc-users] off topic opinions

kqt4a...@gmail.com wrote: > I appreciate all of the feedback > You have saved me a lot of money, headaches and possible alcoholism > I need to rethink my hobbies to fit my space, maybe a nice quilting frame > There are small machines that work acceptably. They still have limitations, but trying

Re: [Emc-users] LinuxCNC would be very nice on the UDOO board.

Mark Wendt wrote: > > I was thinking more of hardware resources, such as interrupts. What > happens when both instances require the same interrupt at the same time? > Unlike shared memory, interrupts are a bit harder to share, or have > concurrent use. Can the separate instances somehow share the

Re: [Emc-users] off topic opinions

doug metzler wrote: > That is another issue. My mill/lathe was only 500 pounds, but when it > arrived I had to get it off the truck myself, get it into the shop and up > on the bench. We used an engine cherry picker. But if you order yourself > a 3500 pound machine you're probably going to need

Re: [Emc-users] off topic opinions

Dave wrote: > You are lucky you were able to get that out at all! > The $150 plywood cost was cheap compared to what the heavy wrecker guys > charge for a tug. > Right, it would have at least needed a truck crane if I couldn't figure out what to do. But, it was a Saturday, and nobody would com

Re: [Emc-users] off topic opinions

andy pugh wrote: > On 27 April 2013 02:56, Jon Elson wrote: > > >> For the 3500 Lb. lathe, I rented a rough terrain forklift, and the >> only one they had weighted 21,500 Lbs, and sank repeatedly in >> my mushy back yard. >> > (Snip other tales of wo

Re: [Emc-users] Beaglebone LinuxCNC starterkit: ready-to-run SD card image

Michael Haberler wrote: > As promised, I have prepared an SD card image for the beaglebone ready-to-run. > Fantastic work, many thanks! > partition 2 - ext4, size 3.8GB or greater, > In a number of places, ext4 has been reported to be associated with early failure of SD cards. I'm not su

Re: [Emc-users] Beaglebone LinuxCNC starterkit: ready-to-run SD card image

Eric Keller wrote: > On Sun, Apr 28, 2013 at 1:55 PM, Jon Elson wrote: > > >> Is there a consensus about BeagleBone vs. Raspberry Pi? >> >> > > I think it's a no-brainer myself. I have a Raspi, but I just don't see it > competing with the

Re: [Emc-users] Beaglebone LinuxCNC starterkit: ready-to-run SD card image

Kenneth Lerman wrote: > > I think if you look at the capabilities of the Bone, it might be hard to > justify adding your board. (Note that I haven't looked at the detailed > specs.) > > The Bone has multiple encoders support. How does the rate supported > compare with the rate of your boards? Th

Re: [Emc-users] Beaglebone LinuxCNC starterkit: ready-to-run SD card image

Dave wrote: > I disagree. > > If you want a killer product for the BeagleBone Black, you need to toss > the EPP port concept entirely and have the BeagleBone Plug into the > Breakout board - similar to a cape. Yes, I mostly agree with this. What I had in mind was to put an 8-bit plus control si

Re: [Emc-users] warning on the Beaglebone LinuxCNC starterkit :-/

Michael Haberler wrote: > as these things go.. I've learned hours after announcing the starterkit that: > > 1. this image will *not* boot on the Beaglebone Black > 2. the 3.2.21/2.6 Xenomai patch used in the starterkit kernel does have a > serious issue > > ad 1): Kent was the first to try and con

Re: [Emc-users] converting Monarch 10EE

Gene Heskett wrote: > > It sounds as if its a 3 phase AC motor turning a DC generator which in turn > powers a DC motor that actually drives the spindle? > Essentially right. > For those DC controls, I'd think it would be a lot more power efficient to > toss the rheostats in favor of pwm contr

Re: [Emc-users] converting Monarch 10EE

andy pugh wrote: > > It has to make more sense to couple a 3-phase motor and > single-phase-input VFD directly to the spindle? > The motor is an odd frame, and also has MASSIVE torque at low speed. So, the 10EE has no back gear. It probably works MUCH better at low speed than a VFD and typical

Re: [Emc-users] logan lathe for sale

On 09/03/2020 01:58 PM, Stuart Stevenson wrote: Heh - tax on hammer of 6.25% and an 18% buyers premium equals a basic 25% surcharge. They need to talk to some government or cell phone company wonks to find a few more various and sundry names for extra charges. Pretty soon the charges will be more

Re: [Emc-users] logan lathe for sale

On 09/03/2020 07:53 PM, Stuart Stevenson wrote: A buyer's premium has been around for a long time. Until a couple years ago it seems as if the premium was hardly ever above 10%. Now it varies between 10% and 20% with 18% as the most prevalent. Lately, they have been adding a hammer premium that s

Re: [Emc-users] Interesting GUI

On Fri, Sep 4, 2020 at 1:05 PM Chris Albertson wrote: On Fri, Sep 4, 2020 at 9:50 AM Mark Wendt wrote: On Fri, Sep 4, 2020 at 12:41 PM Chris Albertson < albertson.ch...@gmail.com wrote ...So, to make LinuxCNC nearly universal, hide it inside a product that is slick and easy to install an

Re: [Emc-users] Cutter compensation

On 09/07/2020 03:24 PM, Leonardo Marsaglia wrote: Is it any advantage in using cutter compensation when programming the g-code using CAM? Because since I've started working with CAM for my turning programs I like to let the software do all the compensation. By the way, I'm talking only about lath

Re: [Emc-users] Another possibly silly Q for Peter or Andy.

On 09/09/2020 11:08 AM, Gene Heskett wrote: Is it possible to get an enable signal, per axis, from the mesa cards that would become true, hopefully a couple micky-secs ahead of the first stepper pulse so no missed steps would normally occur, losing its home, and go back false when the last step h

Re: [Emc-users] Another possibly silly Q for Peter or Andy.

On 09/09/2020 12:16 PM, Gene Heskett wrote: On Wednesday 09 September 2020 12:38:43 Jon Elson wrote: On 09/09/2020 11:08 AM, Gene Heskett wrote: Is it possible to get an enable signal, per axis, from the mesa cards that would become true, hopefully a couple micky-secs ahead of the first

Re: [Emc-users] cnc axis "Touch Off"

On 09/10/2020 05:59 PM, R C wrote: I was just playing with it a bit, I have the idea, that , like homing is done per axis, "touching Off" is done per axis too? Yes, you should be able to select the axis that is to have its offset changed and then enter what that coordinate should be set to.

Re: [Emc-users] cnc axis "Touch Off"

On 09/10/2020 08:28 PM, R C wrote: I figured out the "touch off", and that it 'works' the same as homing, functionally. I wondered what all the different coordinate systems are for, their differnces. (I know what a coordinat system is, mathematician here.) This allows you to set up an offse

Re: [Emc-users] Mini-PC

On 09/11/2020 10:40 AM, Eric Keller wrote: On Thu, Sep 10, 2020 at 7:49 PM Gene Heskett wrote: On Thursday 10 September 2020 18:32:41 Eric Keller wrote: Gene, do you have pictures of your sheldon? Yes, I've posted some to the list so they s/b in the archive. Yell if you can't find them. T

Re: [Emc-users] ot: welders

On 09/14/2020 10:42 AM, grumpy--- via Emc-users wrote: i'm retired just look'n to weld steel at home a stick welder for about 20 years i was attached at the hip to a lincoln stovepipe i've tried a couple of the cheap inverters and they are better than noth'n just barely i know have'n a motor-g

Re: [Emc-users] False mesages at lcnc launch

On 09/15/2020 08:40 AM, Gene Heskett wrote: Axis X Fault Axis Z Fault Axis X Fault Axis Z Fault Note that a lot of drives present the fault signal when disabled. I have had to build a module to "cover" that signal when not enabled so that LinuxCNC can be brought out of E-stop. Jon _

Re: [Emc-users] CAD for parts to make on a lathe

On 09/17/2020 03:37 AM, peterjohnhodg...@gmail.com wrote: I used to use Fusion 360 but they stopped my free licence when they looked at my website and found I did some ‘job shopping’ _regardless of turn over_. I wasn’t prepared to pay the $50 per month so I lost all my Fusion drawings. Be c

Re: [Emc-users] question for Chris and Thaddeus

On 10/15/2020 09:49 PM, John Dammeyer wrote: The theory is that if the PWM signal is high the H-Bridge is switched to say turn the motor clockwise. If the PWM signal is low the H-Bridge is switch to turn the motor counter clockwise. Therefore with 50% the motor is first asked to turn one way

Re: [Emc-users] question for Chris and Thaddeus

On 10/16/2020 12:06 PM, Gene Heskett wrote: But, given fast enough switching fets, can this disadvantage not be addressed with a combo of near the high limit for pwm frequency, and a suitable, non-saturating toroid in series with the motor? Yes, that is what I do with my PWM servo amplifiers.

Re: [Emc-users] for Jon

On 10/17/2020 06:21 PM, Gene Heskett wrote: This is a rail to rail, meaning about a 5.11 volts peak to peak nice square wave, with its bottom sitting on the ground rail. Can I feed that without any further treatment, into the + terminal, pin 2 of your pwm-servo? Or at 5 volts, do I need a prote

Re: [Emc-users] question for Chris and Thaddeus

On 10/18/2020 03:57 AM, Chris Albertson wrote: The above is not the way it works. No one would design anything like that. But let's say you did. What would happen? The motor would vibrate and slowly rotate and have close to zero torque The Geckodrives G-320 series, for one, does this. A number

Re: [Emc-users] question for Chris and Thaddeus

On 10/18/2020 12:07 PM, John Dammeyer wrote: From: Jon Elson [mailto:el...@pico-systems.com] I thought all servo motors did it that way. I can see they could also remove the PWM from the windings completely for 0 power but if there's even the slightest bit of load on the motor the c

Re: [Emc-users] OT: Fanuc 0M setup

On 10/20/2020 02:29 AM, Roland Jollivet wrote: Also, if I want to ditch the controller at a later stage, are the Fanuc servo drives interfaceable to EMC? Can you say what servo amps you have? The oldest Fanuc had standard analog velocity servos, but instead of a DC tachometer, they synthesize

Re: [Emc-users] driver for a DC motor for a BS-1.

On 10/20/2020 03:04 PM, Dave Cole wrote: What about using a common KB Electronics DC drive? Woot.com (Amazon discount site) is selling one for $89. I think they can commonly be found on Note that these drives are NOT isolated from the mains. Anything that doesn't provide isolation for the co

Re: [Emc-users] driver for a DC motor for a BS-1.

On 10/20/2020 03:19 PM, John Dammeyer wrote: I looked at their web site. (google KB Electronic DC drive). Seems like pretty nice stuff although I wonder if they would react fast enough to a closed loop control. If that was even wanted. One of the drives does support tachometer feedback.

Re: [Emc-users] driver for a DC motor for a BS-1.

On Monday 26 October 2020 14:16:55 Chris Albertson wrote: 20% PWM duty cycle and a 24V power supply is about 4.8 volts to the motor. Many DC motors will not move at 20% of rated volts. I'd not be surprised if it took 10 or 12 volts to overcome internal friction. A standard test for servo mo

Re: [Emc-users] driver for a DC motor for a BS-1.

On 10/26/2020 06:48 PM, Gene Heskett wrote: But the switching losses in the olimex board, even at only a 1 kilohertz pwm are killers, getting it hot enough to burn a finger in just 2 or 3 seconds. So, I need a d2a to drive one of the 150 watt class D audio boards after shorting the inputs hi-p

Re: [Emc-users] I am STILL not getting G2/G3

On 10/31/2020 12:01 PM, Gene Heskett wrote: G0 Z4.2500 (clear fixtures etc) (works) G0 X0. Y-0.0700 (pre-position to start a G3 move) (works) (spiral down in relative, so just step z down in additive mode) G91 (relative distance mode) G3 X0. Y-0.0700 Z-0.0250 J0.0700 (dies here) OK, you

Re: [Emc-users] I am STILL not getting G2/G3

On 10/31/2020 03:46 PM, Gene Heskett wrote: Yes Jon, r1 does not equal r2. Gawd I wish that error window was copy/pastable. The code straight out of counterbore.py has exactly the same error. Is there a newer version of it? Where? I never use IJ arcs, but only R arcs. Saves me a LOT of hea

Re: [Emc-users] EPP

On 11/01/2020 10:18 AM, andy pugh wrote: First off I have no idea if the SIIG board works and indeed no idea of how to test it. If it shows up in lspci as a parallel port card that's a good start. Does it have a Moschip chip? Those generally work. SIIG parallel ports used to be my universal E

Re: [Emc-users] how to control lathe spindle with a mesa 7i77 card

On 11/01/2020 12:46 PM, Ed wrote: On 11/1/20 10:30 AM, andy pugh wrote: On Sun, 1 Nov 2020 at 04:43, andrew beck wrote: On a 7i76 the 0_10v is isolated from the Mesa card I think. Is a 7i77 similar? I just a bit cagy about connecting up electrically to the VFD inputs. As I don't want to

Re: [Emc-users] how to control lathe spindle with a mesa 7i77 card

On 11/02/2020 03:31 AM, andrew beck wrote: Thanks Jon. I am controlling a 1988 fanuc velocity spindle drive. And no Idea about isolation. Not keen to try it lol. Really I just want a isolated 0-10v virtual pot like the Mesa 7i76 has. Otherwise I might daisy chain in a 7i76 just for the spind

Re: [Emc-users] limit switch configuration on lathe in linxcnc (2.7)

On 11/06/2020 07:33 PM, R C wrote: I noticed I can (in stepconf, which I shouldn't use of course...) That I can use the limit switches as 'home' for an axis only. Unless I am understanding this wrong, I figured an axis would travel there and when it hits it thinks "I am home" ? T

Re: [Emc-users] limit switch configuration on lathe in linxcnc (2.7)

On 11/06/2020 09:08 PM, R C wrote: ok... but, if I turn the lathe an computer off.. then restart them and want to home the lathe.. it wouldn't know how to do that unless it hit a limit switch? Yes, the limit switch can be set up to also be taken as the home switch. But, you need som

Re: [Emc-users] anti-freeze recommendation for water cooled spindle motors

On 11/07/2020 05:34 PM, Gene Heskett wrote: Greetings all; I have just found that food grade antifreeze in the water seems to be a nono for long term useage as motor coolant. Why do you need food grade in a recirculating system? How about plain old antifreeze, which has lubes and anti-corrosi

Re: [Emc-users] back to a bad cable?

On 11/13/2020 10:14 AM, Gene Heskett wrote: Greetings all; I, despite seeingthe signals on the bobs input leds just fine, am not seeing them at all the inputs to encoder.01 in the 5i25. And I just made that 5' cable a month ago. IDC crap. I have a 100 ft roll of Belden ribbon cable thats now a

Re: [Emc-users] linuxcnc board with good epp port

On 11/15/2020 04:48 PM, dave engvall wrote: HI, With *B*lack Friday on/coming I need a recommendation for a motherboard that has good latency and a rock solid EPP port. Servo application so that should relieve some of the constraints. It needs to work with Jon's upwm and Peter's 7i34. Natura

Re: [Emc-users] couple Q's on PID's

On 11/18/2020 09:03 AM, Gene Heskett wrote: I have apparently damaged the encoders output stages, and hooking its leads up to the bobs inputs results in the rising edge of the signal looking like its charging a large capacitance. Falling edge is fine. Quadrature is excellent. Perhaps the enco

Re: [Emc-users] G10 L2 question?

On 11/20/2020 07:40 AM, Gene Heskett wrote: Greetings all; I am rewriting my holefinder routine. I would like to know if a G10 L2 axis's R P1 is exactly the same as doing a touch off by mouse for system G54? Except for the added R of course. On the 6040, I have also worked out a 2 pins in paral

Re: [Emc-users] Installing LCNC on Raspberrypi 3B+

On 11/27/2020 12:53 PM, John Dammeyer wrote: I just put the brain dead LinuxCNC distribution onto an SD card. Then booted and pulled the ini and hal files from the PC into the proper folder. BDI (Brain Dead Install)? But, that's a 20 year old system, X-86 only, and it would be hard to find h

Re: [Emc-users] Servo Amp Documentation?

On 12/05/2020 04:49 PM, Karl Schmidt wrote: Most electrical hardware problems turn out to be connectors. Yes, I can verify this. I've just resurrected a vintage-2000 pick and place machine. I had to reseat a whole bunch of connectors, and even reseat many socketed ICs (they used a bunch o

Re: [Emc-users] Spindle indexing

On 12/05/2020 11:41 PM, John Dammeyer wrote: What I was wondering is if LinuxCNC, with a suitable Servo Motor or high res encoder on the spindle can treat it like a 4th axis on a mill. I believe some people have done this. One of the issues is how to gracefully change LinuxCNC from a spindl

Re: [Emc-users] [was Spindle indexing] now rigid tapping help

On 12/07/2020 05:11 AM, Gene Heskett wrote: Just one problem. I've not measured it, but I believe the backlash move may be done the instant motion issues the reversal, so it takes place during the spindle slowdown as its still spinning fwd. This results in the resultant thread being cut sloppy as

Re: [Emc-users] [was Spindle indexing] now rigid tapping help

On 12/07/2020 05:19 AM, andy pugh wrote: On Mon, 7 Dec 2020 at 11:13, Gene Heskett wrote: Now comes the improvement request for two more pins into motion. I need a pin to disable the backlash move, until the spindle has actually stopped. Are you sure that isn't what already happens? (I guess

Re: [Emc-users] [was Spindle indexing] now rigid tapping help

On 12/07/2020 06:17 AM, Gene Heskett wrote: But it may take a bit, my wife has reached the end stage of her COPD. Hours, maybe a day or so left. I was invited to come and visit yesterday despite the covid lock down. And I'll go back today. Sorry to hear that, very sad. Hang in there, and maybe

Re: [Emc-users] Mesa Tacho Generator?

On 12/07/2020 08:47 AM, Todd Zuercher wrote: Is it possible to set up a firmware for a Mesa FPGA that could read the encoder velocity from an encoder input and output that velocity as an analog command directly to an analog output (hopefully at faster than the servo thread rate) in order to by

Re: [Emc-users] Mesa Tacho Generator?

On 12/07/2020 11:44 AM, Chris Albertson wrote: Really? "As much as you want"? It is not hard at all to build a device that works at the mechanical limits of an encoder but "as much as you want" could be a lot more than what is possible. There is going to be quantitation noise of the speed.

Re: [Emc-users] Mesa Tacho Generator?

On 12/07/2020 11:49 AM, John Dammeyer wrote: Googling L290 with Counter or Quadrature doesn't yield anything. Got any more details? I had no trouble finding it immediately. But, here's a link : https://www.digchip.com/datasheets/parts/datasheet/456/L290-pdf.php Jon _

Re: [Emc-users] Mesa Tacho Generator?

On 12/07/2020 01:45 PM, andy pugh wrote: On Mon, 7 Dec 2020 at 19:42, Todd Zuercher wrote: Mostly, I was hoping to avoid the thread delays of having to go through hal adding 1-2 more thread cycles to the "staleness" of the data. (Encoder read/process to velocity, Hal read from Mesa, Hal pro

Re: [Emc-users] [was Spindle indexing] now rigid tapping help

On 12/07/2020 03:54 PM, Gene Heskett wrote: On Monday 07 December 2020 12:16:35 Jon Elson wrote: And a/o about 13:30 local, I am alone again. My Dee has passed. So sorry to hear that! Jon ___ Emc-users mailing list Emc-users@lists.sourceforge.net

Re: [Emc-users] Tuning a servo

On 12/08/2020 10:53 PM, Gene Heskett wrote: What does that 22mv mean in folllowing error since I have that set for about half an inch at the moment? It is not milli VOLTS, it is milli-units. Generally inches or mm, depending on your preference. so 22m means 0.022" assuming that's what you use.

Re: [Emc-users] I wonder...

On 12/11/2020 03:03 AM, andy pugh wrote: https://hackaday.com/2020/12/10/a-xilinx-zynq-linux-fpga-board-for-under-20-the-windfall-of-decommissioned-crypto-mining/ So an ARM core and an FPGA on one board? I wonder if one could put LinuxCNC on the ARM and Hostmot2 on the FPGA? Well, they may no

Re: [Emc-users] I wonder...

On 12/11/2020 11:30 AM, John Dammeyer wrote: My Delta Bandsaw is from 1939. I power it up, cut a piece of wood and turn it off. It's a tool. Sometimes I think we lose sight of the fact that the mills and lathes running CNC are also tools with more than a life of the latest newest OS or Com

Re: [Emc-users] I wonder...

On 12/11/2020 05:50 PM, John Dammeyer wrote: I just used the Pi4 LinuxCNC version to do some simple slotting. All done with the MDI. Should really have done the G-Code but it was a one of test thing. It's there that I realized yet again that something between the capability of the Pendant

Re: [Emc-users] fixed A offset problem

On 12/11/2020 06:35 PM, Gene Heskett wrote: Greetings all; In playing some more with this servo, I am in the +-10% of right for the SCALE, getting that somewhere near right also lowered the Pgain from 30 to around 2000, but demanded an FF1 of about 17.6. But after homing, which in this case

Re: [Emc-users] Question Regarding Selective Assignments in HAL

On 12/12/2020 08:12 AM, Matthew Herd wrote: Hi All, I’m sure there’s a simple answer for my question, but I haven’t been able to figure it out. Currently the configuration for the spindle forward and reverse outputs is as follows: # connect spindle fwd/rev to I/O controller net SpindleFwd <=

Re: [Emc-users] Beaglebone and MachineKit

On 12/12/2020 01:38 PM, marcus.bow...@visible.eclipse.co.uk wrote: John (or anyone else), Is there a 'cape' currently available to suit the Beaglebone Black running MachineKit or LinuxCNC? I know there used to be a cape specifically for that purpose, but it has been out of production for some

Re: [Emc-users] Raspberry Pi LinuxCNC 2.8 question.

On 12/12/2020 02:40 PM, Nicklas SB Karlsson wrote: To make a link to a file "ln -s filename filename", read manual page "man ln", I always create the link in the wrong direction first time. Yes, me too! It is just totally Unix-like that the parameters are reversed depending on if it is an ln

Re: [Emc-users] Raspberry Pi LinuxCNC 2.8 question.

On 12/12/2020 03:41 PM, John Dammeyer wrote: From: Nicklas SB Karlsson [mailto:nk@nksb.online] To make a link to a file "ln -s filename filename", read manual page "man ln", I always create the link in the wrong direction first time. Oh gawd, that would mean using the command line. How antiqu

Re: [Emc-users] Raspberry Pi LinuxCNC 2.8 question.

On 12/12/2020 06:01 PM, Gene Heskett wrote: Simple, works 100% of the time if you can type. I've never ever found a file manager that actually gets it right OOTB. I think theres an unwritten rule that it won't. Why muck around with a file manager? Except for the swiss army knife called mc, mos

Re: [Emc-users] Question Regarding Selective Assignments in HAL

On 12/12/2020 08:12 PM, Matthew Herd wrote: Jon, I have two USC boards on the same parallel port. I think there is a bit of a clarity issue in the documentation here: http://www.linuxcnc.org/docs/html/drivers/pico-ppmc.html . The loa

Re: [Emc-users] Question Regarding Selective Assignments in HAL

On 12/12/2020 08:12 PM, Matthew Herd wrote: Which raises the question of how the inputs and outputs will be enumerated for the second board. Will the second board inputs enumerate as ppmc.00.din.16.in through ppmc.din.31.in and the outputs as ppmc.00.dout.08.out through ppmc.00.dout.15.out

Re: [Emc-users] Beaglebone and MachineKit

On 12/13/2020 03:15 AM, Robert Murphy wrote: The reason for the switch from MK to Linuxcnc, the Linuxcnc project just has a better feel, IMHO, and the forum appears to have more members that use it in a commercial setting. I'm not saying that the former statement is gospel. Yes, MachineKit

Re: [Emc-users] Beaglebone and MachineKit

On 12/13/2020 08:47 PM, Gene Heskett wrote: And I will say not to the degree you might think. Right. LinuxCNC has added some things like HAL that cause increased overhead (probably no worse than 10%). The ONE big thing that eats up resources is the 3D graphical preview. There are GUIs that

Re: [Emc-users] Question Regarding Selective Assignments in HAL

On 12/14/2020 09:03 AM, Matthew Herd wrote: I’ve had a chance to do some reading. In particular, I’ve been contemplating Jon’s approach and the spindle component. The manual is very interesting because the spindle component seems to include most of the functionality I need. I was wondering

Re: [Emc-users] Question Regarding Selective Assignments in HAL

On 12/14/2020 10:19 AM, andy pugh wrote: On Mon, 14 Dec 2020 at 16:15, Jon Elson wrote: Well, interesting. Now, where does spindle come from? In my configs, I have signals like : spindle.0.forward and spindle.0.speed-out But, there is no loadrt spindle command anywhere. This is rather

Re: [Emc-users] Question Regarding Selective Assignments in HAL

On 12/14/2020 10:37 AM, Matthew Herd wrote: Thanks Andy, I’ll play with HAL today and see what happens. Jon, you’re using the motion pins (spindle.0.x) while the "Spindle" component also has the same naming format and some of the same names. It took me awhile to sort it out. Depends on th

Re: [Emc-users] Spindle + MDI (Was: I wonder...)

On 12/15/2020 03:43 PM, andy pugh wrote: The first time I tried it, I got what I expected, then I tried again and now it gives the wrong behaviour every time. So at least I have a system to try debugging on. BTW, using a PC and Axis 2.7.14 (still with the MESA) it exhibits the same issue. Whi

[Emc-users] Interface Simodrive 611 ?

Has anyone interfaced a Simodrive 611 servo system? I did find the manual online, but there is a LOT of info, and it is not really easy to follow. I see it has several analog inputs, so I'm thinking that the traditional scheme, CNC control sends analog velocity command to drive, drive receiv

Re: [Emc-users] Interface Simodrive 611 ?

On 12/19/2020 04:32 PM, Gene Heskett wrote: I did a look-see with giggle and a few hits down from the first, says its being phased out, meaning since its now a decade old, support will vanish shortly. So I'd not put it in any new upgrades or conversions. Not to mention its pricey, wy pricey.

Re: [Emc-users] Interface Simodrive 611 ?

On 12/19/2020 06:39 PM, Gene Heskett wrote: That's a good enough reason, Jon and gets LinuxCNC in the door, opening up that customer by upping, maybe even doubling his productivity in parts per hour. He has got to like that. If he is willing to learn how to use the improved coding LCNC makes pos

Re: [Emc-users] Interface Simodrive 611 ?

On 12/21/2020 01:00 PM, Dave Cole wrote: I have worked on Siemens controls and drives for years. It depends on how old your Simodrive is. Do you have a Simodrive 611U or an earlier 611 drive? They had some really old drives in the early 90s that were also called 611's but they were not like the

Re: [Emc-users] Checking vfd hookup question?

On 12/22/2020 06:30 PM, Matthew Herd wrote: In my research on resistor sizing, I heard reports that Haas uses stove elements for their braking resistors. On factory machines, no less. Of course that’s second hand, so I can’t say it’s true. Yes, absolutely. Our Haas at work has a stovetop e

Re: [Emc-users] Checking vfd hookup question?

On 12/23/2020 06:55 PM, andrew beck wrote: Just to tag in. I need a braking resistor for my cnc mill spindle it's a 7.5kw vfd. Needs to rigid tap all the time etc Any ideas? I like the idea of a stove element.. Just need to know some values etc Get the 11" stove elements. A 2400 W element

Re: [Emc-users] Checking vfd hookup question?

On 12/24/2020 02:18 AM, Chris Albertson wrote: "All the time?"When you have a hard requirement like this is when some detailed engineering can pay off.Assume you are reversing at 50% duty cycle and burning 1KW 50% of the time. Where I live this can cost 12 cents per hour. This is $89 p

Re: [Emc-users] Checking vfd hookup question?

On 12/24/2020 11:43 AM, Dave Cole wrote: Automation Direct sells braking resistors. https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/vfd_accessories/braking_units_-a-_resistors Looks like the cheapest one is about $30. I've used

Re: [Emc-users] Merry Christmas

On 12/25/2020 08:29 AM, Thomas J Powderly wrote: Merry Christmas to all Best wishes for the New Year Yes! I appreciate all the hard work all the developers do for the continued progress of LinuxCNC. So many other open source projects wither on the vine, but LinuxCNC has continued to be impro

[Emc-users] Season's greetings

Stuart, I hope you and your family have managed to avoid the virus and are doing well. We mostly have, but Daniel did get the "Covid toes" about April. Matthias has been a police officer in Topeka for about a year now, so not that far from you. I've attached a writeup on what has been going

Re: [Emc-users] Season's greetings

On 12/25/2020 07:30 PM, Jon Elson wrote: Stuart, I hope you and your family have managed to avoid the virus and are doing well. We mostly have, but Daniel did get the "Covid toes" about April. Ugh, sorry, I had intended that message to go DIRECTLY to Stuart, not to the l

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