Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-04-09 Thread Sam Sokolik
X is almost ready to test... https://photos.app.goo.gl/GzyjvC49J2rTXyaG8 On Thu, Apr 7, 2022 at 8:18 AM Sam Sokolik wrote: > Most likely it needs that movement because it can spin 30 + inches ;) > > sam > > On Thu, Apr 7, 2022 at 5:46 AM andy pugh wrote: > >> On Wed,

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-04-07 Thread Sam Sokolik
Most likely it needs that movement because it can spin 30 + inches ;) sam On Thu, Apr 7, 2022 at 5:46 AM andy pugh wrote: > On Wed, 6 Apr 2022 at 20:22, Sam Sokolik wrote: > > > > The cross slide has around 17 inches of travel... Crazy.. > > For gang-tooling perha

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-04-06 Thread Sam Sokolik
The cross slide has around 17 inches of travel... Crazy.. https://photos.app.goo.gl/Z4NKdazgTGVAkPtD8 https://photos.app.goo.gl/hjk4Wb4kbZAjTnRZ9 sam On Thu, Mar 24, 2022 at 6:53 AM Stuart Stevenson wrote: > The only thing I would add to Andy's comments about machining hard steel > with ca

Re: [Emc-users] custom | stock bearing nut

2022-04-05 Thread Sam Sokolik
look at that - they actually make a tap.. https://www.ebay.com/itm/255422311969?hash=item3b785b2e21:g:hmoAAOSwI4VdVsri On Tue, Apr 5, 2022 at 11:57 AM Sam Sokolik wrote: > wow - I had a hard enough time finding 12mm x 1.. The local hardware > store actually had 'jam nuts' i

Re: [Emc-users] custom | stock bearing nut

2022-04-05 Thread Sam Sokolik
wow - I had a hard enough time finding 12mm x 1.. The local hardware store actually had 'jam nuts' in that pitch. I can't say I have ever run across .8 - are you sure? ;) sam On Tue, Apr 5, 2022 at 11:47 AM dave engvall wrote: > Hi all, > I have a pair of ball screws: THK KX 71227 A > Th

Re: [Emc-users] Homebuilt encoder

2022-03-31 Thread Sam Sokolik
I don't know - maybe over-thinking this a bit? I have 2 machines using gear tooth sensors. Both rigid tap perfectly without issues. http://electronicsam.com/images/matsuura/sensors1.jpg On Thu, Mar 31, 2022 at 8:32 AM gene heskett wrote: > On Thursday, 31 March 2022 07:57:53 EDT andrew beck w

Re: [Emc-users] Homebuilt encoder

2022-03-27 Thread Sam Sokolik
I am running a 48ish tooth gear with gear tooth sensors - it counts up to 10k with mesa. http://electronicsam.com/images/greenmachine/20190401_150213.jpg http://electronicsam.com/images/greenmachine/20190403_175734.jpg sam On Sun, Mar 27, 2022 at 4:27 PM dave engvall wrote: > At high rpm a r

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-21 Thread Sam Sokolik
x27;t want to risk having it change the shape of the saddle. sam On Mon, Mar 21, 2022 at 11:03 AM andy pugh wrote: > On Mon, 21 Mar 2022 at 12:23, Sam Sokolik wrote: > > > > Dad ground the ball screw nut. > > Inventive :-) > > I have used the RSH

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-21 Thread Sam Sokolik
The nut, though felt, pretty hard. On Mon, Mar 21, 2022 at 9:22 AM Sam Sokolik wrote: > That was a generic ball screw from ebay with the ends machine. My > understanding is the shaft is only surface hardened and is pretty soft > underneath. (have not tried filing various areas of

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-21 Thread Sam Sokolik
to soften the final portion of the ballscrew to machine > that thread? I've never done it and the ones I'm mounting in the router are > fixed (rotating nut). > > El lun, 21 mar 2022 a las 10:15, Sam Sokolik () > escribió: > > > Sorry - meant to post > >

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-21 Thread Sam Sokolik
Sorry - meant to post https://photos.app.goo.gl/yBNmiD9rRkPCoNgJ8 On Mon, Mar 21, 2022 at 7:19 AM Sam Sokolik wrote: > Dad ground the ball screw nut.. everything fits nicely under the cross > slide it seems.. Found a bit of aluminium to make a simple bearing block > for 2 angula

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-21 Thread Sam Sokolik
Dad ground the ball screw nut.. everything fits nicely under the cross slide it seems.. Found a bit of aluminium to make a simple bearing block for 2 angular contact bearings.. https://photos.app.goo.gl/NcW1fxrBGBgXH1SPA https://photos.app.goo.gl/jWwKR5Fvz9ae4bbR7 https://photos.app.goo.gl/jWwK

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-20 Thread Sam Sokolik
Groan... ;) On Sun, Mar 20, 2022, 6:02 PM Ralph Stirling wrote: > Sam, when you finish the lathe project we'll give you the Nebel prize. > > -- Ralph > > On Mar 18, 2022 7:33 AM, Sam Sokolik wrote: > CAUTION: This email originated from outside the Walla Walla Un

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-20 Thread Sam Sokolik
e testing that ensured it was tough and reliable. > Just wondering if it's now a permanent tool. > > John > > > > -Original Message- > > From: Sam Sokolik [mailto:samco...@gmail.com] > > Sent: March-17-22 8:07 PM > > To: Enhanced Machine Control

Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-18 Thread Sam Sokolik
Thought about it... :) On Fri, Mar 18, 2022 at 4:50 AM andy pugh wrote: > On Fri, 18 Mar 2022 at 03:11, Sam Sokolik wrote: > > > > https://www.youtube.com/watch?v=mes7pFZ90Fg > > If you fitted linear scales you could potentially have manual rapids > by d

[Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

2022-03-17 Thread Sam Sokolik
https://www.youtube.com/watch?v=mes7pFZ90Fg Have the x axis ball screw mostly figured out... https://photos.app.goo.gl/ddodLA6dFu7Cdamv9 https://photos.app.goo.gl/9Wmha6zWBcSewhLv8 The ball nut flange needs a bit removed... sam ___ Emc-users mailing

Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H

2022-03-07 Thread Sam Sokolik
FF? On Mon, Mar 7, 2022 at 12:03 PM John Dammeyer wrote: > What 'FF' that isn't running? > > > -Original Message- > > From: gene heskett [mailto:ghesk...@shentel.net] > > Sent: March-07-22 4:19 AM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Pi4 with LinuxCNC an

Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H

2022-03-07 Thread Sam Sokolik
I have been using one of those heatsink cases with passive cooling.. On Mon, Mar 7, 2022 at 9:31 AM Peter C. Wallace wrote: > On Mon, 7 Mar 2022, John Dammeyer wrote: > > > Date: Mon, 7 Mar 2022 00:00:41 -0800 > > From: John Dammeyer > > Reply-To: "Enhanced Machine Controller (EMC)" > > >

Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H

2022-03-06 Thread Sam Sokolik
hey - I have the configs / Pi files here https://electronicsam.com/images/greenmachine/config/ sam On Sun, Mar 6, 2022 at 12:16 PM Chris Albertson wrote: > On Sun, Mar 6, 2022 at 3:40 AM Robin Szemeti via Emc-users < > emc-users@lists.sourceforge.net> wrote: > > > The Pi4 and a Mesa ethernet c

Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H

2022-03-06 Thread Sam Sokolik
I still have the pi and 7i92 running on the green machine. I don't remember the last time I got a realtme error. But I run Idle=poll isolcpus = 1,2,3 (going from memory) Force turbo = 1 And I think I have a bit of an overclock. On Sun, Mar 6, 2022, 6:24 AM Jérémie Tarot wrote: > Le dim. 6

Re: [Emc-users] Probably a silly question about G76 and G33

2022-02-09 Thread Sam Sokolik
That is very odd. Never seen that and the code base hasn't been touched for a while.. Can you post your hal config? sam On Wed, Feb 9, 2022 at 9:04 AM Leonardo Marsaglia wrote: > NOTE: I retire that thing about the problem not happening for larger > pitches. It happens with any pitch I try. O

Re: [Emc-users] Stepper PID

2022-02-02 Thread Sam Sokolik
I don't see the configs.. Did I miss something? On Wed, Feb 2, 2022 at 8:32 AM andy pugh wrote: > On Wed, 2 Feb 2022 at 14:22, Thaddeus Waldner wrote: > > > Here is a short video that illustrates the problem. > > https://youtu.be/DdYYpdC51Vs > > Admittedly I watched it with the sound off, but

Re: [Emc-users] Stepper PID

2022-02-02 Thread Sam Sokolik
Could you post your configs? Could your hal functions be out of order? I run pid steppers with RPI and don't notice this. Sam On Wed, Feb 2, 2022, 3:01 AM andy pugh wrote: > On Wed, 2 Feb 2022 at 07:44, Thaddeus Waldner wrote: > > > 2) why is servo thread jitter even making into the stepper

Re: [Emc-users] 60's vintage position feedback.. (GE Accupins)

2022-01-25 Thread Sam Sokolik
https://youtu.be/7HtqwcKDlCk On Sun, Jan 23, 2022, 6:47 PM Chris Albertson wrote: > This > > On Sun, Jan 23, 2022 at 4:30 PM andy pugh wrote: > > > On Sat, 22 Jan 2022 at 04:49, Chris Albertson > > > wrote: > > > > > > Arduino? Too slow to coune pulses if they happen every 0.0001 inch > > un

Re: [Emc-users] 60's vintage position feedback.. (GE Accupins)

2022-01-21 Thread Sam Sokolik
day 2... https://www.youtube.com/watch?v=UZ6Xuvo6zWs On Fri, Jan 21, 2022 at 9:12 AM Sam Sokolik wrote: > Remember - the excitation signal is 250hz I want to measure wave > form to wave form within that at a minimum of 1000 counts. Not much power > needed.. > > sam >

Re: [Emc-users] 60's vintage position feedback.. (GE Accupins)

2022-01-21 Thread Sam Sokolik
Remember - the excitation signal is 250hz I want to measure wave form to wave form within that at a minimum of 1000 counts. Not much power needed.. sam On Fri, Jan 21, 2022 at 9:09 AM Les Newell wrote: > The only issue on an Uno would be interrupt latency. If you disable all > other inte

Re: [Emc-users] 60's vintage position feedback.. (GE Accupins)

2022-01-21 Thread Sam Sokolik
My plan is to use the 16 bit timer on the arduino to trigger on the input square wave rising edge and then count until it see's the return wave form rising edge. (the return waveform will get converted to a square wave) Atleast that is the plan... SO - I guess it comes down to how accurate the ph

[Emc-users] 60's vintage position feedback.. (GE Accupins)

2022-01-20 Thread Sam Sokolik
https://www.youtube.com/watch?v=ogUdjX3zerY The plan is to use the arduino to count the phase difference between the input and output. The original control used a 250khz clock frequency to count - the coils are driven with 250hz. So they could divide each .1" pin by 1000. This gave the machine

Re: [Emc-users] Very good software backlash control demo.

2022-01-03 Thread Sam Sokolik
n Monday, January 3, 2022 11:00:54 PM EST Sam Sokolik wrote: > > I think this just would work with linuxcnc and scales + motor encoders. > > WIth the scales using only I in the 2 pid loops - it would be constantly > > correcting backlash to keep the position.. (that is what the G&L d

Re: [Emc-users] Very good software backlash control demo.

2022-01-03 Thread Sam Sokolik
I think this just would work with linuxcnc and scales + motor encoders. WIth the scales using only I in the 2 pid loops - it would be constantly correcting backlash to keep the position.. (that is what the G&L did) sam On Mon, Jan 3, 2022 at 9:50 PM Chris Albertson wrote: > I think his method

Re: [Emc-users] Very good software backlash control demo.

2022-01-03 Thread Sam Sokolik
This has been done at a bigger scale... (2 feedback loops) https://web.archive.org/web/20160222165548/http://jmkasunich.com/cgi-bin/blosxom/shoptask/wichita-trip-02-20-08.html http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Combining_Two_Feedback_Devices_On_One_Axis On Mon, Jan 3, 2022, 8:42 PM Chris

Re: [Emc-users] Choice of CNC conversions

2021-12-27 Thread Sam Sokolik
wow - that was a walk down memory lane.. JohnK, JonE and Peter all posted in those threads... On Mon, Dec 27, 2021 at 7:16 PM Sam Sokolik wrote: > Hmm - I mean - if you want to do a ton of reading - you can watch the > journey... This was a big project because it originally was 2.

Re: [Emc-users] Choice of CNC conversions

2021-12-27 Thread Sam Sokolik
/vertical-mill-lathe-project-log/24-large-kearney-amp-trecker-hmc-conversion.html On Mon, Dec 27, 2021 at 6:34 PM John Dammeyer wrote: > Web Link? > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > > Lol.. let me do that again... > > > > The Kearney a

Re: [Emc-users] Choice of CNC conversions

2021-12-27 Thread Sam Sokolik
, Dec 27, 2021, 5:35 PM Sam Sokolik wrote: > The Kearney and trecker > > On Mon, Dec 27, 2021, 5:33 PM Feral Engineer > wrote: > >> The pay walls, axis limits and markups on accessories are the reasons I >> avoided centroid. >> >> The thing I love

Re: [Emc-users] Choice of CNC conversions

2021-12-27 Thread Sam Sokolik
The Kearney and trecker On Mon, Dec 27, 2021, 5:33 PM Feral Engineer wrote: > The pay walls, axis limits and markups on accessories are the reasons I > avoided centroid. > > The thing I love most about Linuxcnc is the flexibility, reliability and > yes, classicladder - or at least ladder based p

Re: [Emc-users] Choice of CNC conversions

2021-12-24 Thread Sam Sokolik
Hmm.. so the realtime patches being integrated into Linux kernel is worthless old technology? They are waisting their time? (This is unrelated to LinuxCNC) Currently LinuxCNC is being added to debian testing. It will soon be part of the debian repository. On Fri, Dec 24, 2021, 12:54 PM Chris

Re: [Emc-users] Choice of CNC conversions

2021-12-23 Thread Sam Sokolik
Because linuxcnc is so flexible - I actually did some testing between mach3 and linuxcnc when the new trajectory planner was being developed.. http://wiki.linuxcnc.org/cgi-bin/wiki.pl?NewTrajectoryControl This is using linuxcnc to sample the step/direction signals from mach and linuxcnc to plot a

Re: [Emc-users] Harmonic Drive

2021-12-20 Thread Sam Sokolik
t can be > done but not if the plastic parts flex. > > On Mon, Dec 20, 2021 at 10:39 AM Sam Sokolik wrote: > > > Did you watch this video til the end? I time stamped it. > > > > https://youtu.be/eW1GGI55Epc?t=878 > > > > sam > > > > > > &

Re: [Emc-users] Harmonic Drive

2021-12-20 Thread Sam Sokolik
Did you watch this video til the end? I time stamped it. https://youtu.be/eW1GGI55Epc?t=878 sam On Mon, Dec 20, 2021 at 12:26 PM Chris Albertson wrote: > On Fri, Dec 17, 2021 at 6:05 PM Sam Sokolik wrote: > > > Hmm - seems we are making things a bit more complicated than

Re: [Emc-users] Harmonic Drive

2021-12-17 Thread Sam Sokolik
Hmm - seems we are making things a bit more complicated than they need to be.. Why didn't the simple flex gear work ok? You need to make the system with fine enough splines that the flexure is at a minimum...You can lower the backlash to a minimum by applying a small amount of pressure to th

Re: [Emc-users] Resolver to quadrature converter.

2021-12-06 Thread Sam Sokolik
this is what happens when you short out the op-amp with the oscilloscope probe.. Good thing I have 2... https://photos.app.goo.gl/wzKK3JSgVtdbBmfM6 On Mon, Dec 6, 2021 at 12:21 PM Sam Sokolik wrote: > Part 2 > > https://www.youtube.com/watch?v=xoHajQaHcOU > > On Thu, Dec 2, 2

Re: [Emc-users] Resolver to quadrature converter.

2021-12-06 Thread Sam Sokolik
Part 2 https://www.youtube.com/watch?v=xoHajQaHcOU On Thu, Dec 2, 2021 at 12:19 AM Sam Sokolik wrote: > Andy had sent these to me years ago and I finally figured out why I > couldn't get them to work. > > (Granted the ones that pico systems and mesa sell are better.) >

Re: [Emc-users] Harmonic Drive

2021-12-02 Thread Sam Sokolik
gure out how you lock it onto the shaft. > > John > > > > > > -Original Message- > > From: Sam Sokolik [mailto:samco...@gmail.com] > > Sent: December-01-21 8:50 PM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Harmonic Dri

[Emc-users] Resolver to quadrature converter.

2021-12-01 Thread Sam Sokolik
Andy had sent these to me years ago and I finally figured out why I couldn't get them to work. (Granted the ones that pico systems and mesa sell are better.) https://youtu.be/xoHajQaHcOU Wiki here... http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ResolverToQuadratureConverter ___

Re: [Emc-users] Harmonic Drive

2021-12-01 Thread Sam Sokolik
I have seen that video too! I watch too much youtube.. It doesn't really look that strong..mine stalled at 35ftlb or 47.45Nm Oh - I am officially a thingiverser... https://www.thingiverse.com/thing:5151905 On Wed, Dec 1, 2021 at 10:24 PM Chris Albertson wrote: > The Step file I sent

Re: [Emc-users] Harmonic Drive

2021-12-01 Thread Sam Sokolik
Lol - both work here. On Wed, Dec 1, 2021 at 6:43 PM Gene Heskett wrote: > still a 404 > > > On Wed, 1 Dec, 2021 at 7:21 PM, John Dammeyer > wrote: > > > To: 'enhanced machine controller (emc)' > Try it again. Should be there now. Timing I think... > > Also take a look at > www.autoartisans.

Re: [Emc-users] to JD

2021-12-01 Thread Sam Sokolik
Huh. I have printed probably half a roll so far.. (it is an ender 3 pro - from maybe a year ago) On Wed, Dec 1, 2021 at 5:21 PM Gene Heskett wrote: > On Wed, 1 Dec, 2021 at 6:10 PM, Sam Sokolik wrote: > > > To: enhanced machine controller (emc) > [...] > My ender 3 see

Re: [Emc-users] to JD

2021-12-01 Thread Sam Sokolik
My ender 3 seem to print petg ok... On Wed, Dec 1, 2021, 5:02 PM Gene Heskett wrote: > On Wed, 1 Dec, 2021 at 5:21 PM, John Dammeyer > wrote: > > > To: 'enhanced machine controller (emc)' > >As it turns out I have something called Molykote 111 compound used for > lubricating > >the rotating val

Re: [Emc-users] Harmonic Drive

2021-12-01 Thread Sam Sokolik
The problem (I think) is that you want to deform the plastic as little as possible. That is why I went with smaller teeth... (and no cup) sam On Wed, Dec 1, 2021 at 3:22 PM Chris Albertson wrote: > Thanks for the link. But I noticed there was a STEP file provided. I've > imported it into F

Re: [Emc-users] Harmonic Drive

2021-12-01 Thread Sam Sokolik
; > 1.5mm which ends up being too stiff. > > > > > > Then end result is this version has backlash but it turns quite > nicely.The max I can get with this small Size 23 old surplus stepper is > > 8 > > > seconds in one revolution with the 35:1 reduction at 1600 &

Re: [Emc-users] Harmonic Drive

2021-11-30 Thread Sam Sokolik
ok - I sent the stl's but it is awaiting for approval.. So here they are again.. http://electronicsam.com/images/greenmachine/harmonic/ That creates 100:1 or 101:1 depending on which side is stationary... On Tue, Nov 30, 2021 at 9:12 PM Sam Sokolik wrote: > I am pretty sure thi

Re: [Emc-users] Harmonic Drive

2021-11-30 Thread Sam Sokolik
The meshing of the harmonic drive splines slide in and out... not like involute gears that rotate though with point pressure (not sliding) On Tue, Nov 30, 2021, 7:32 PM Stuart Stevenson wrote: > Isn't the purpose of an involute surface the minimization of sliding two > surfaces? I would think

Re: [Emc-users] Harmonic Drive

2021-11-30 Thread Sam Sokolik
icro-steps/rev. I also > can't grab the hub and stop it. > > Finally, the spline gear and support body must be a lot thicker as it > moves under load which shows up in the original authors video too. > > I'll put together a folder with the photos. > > John > > > >

Re: [Emc-users] Harmonic Drive

2021-11-30 Thread Sam Sokolik
ook at the > tooth shape. > Thanks > John > > > > -Original Message- > > From: Sam Sokolik [mailto:samco...@gmail.com] > > Sent: November-27-21 8:18 PM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Harmonic Drive > >

Re: [Emc-users] Harmonic Drive

2021-11-27 Thread Sam Sokolik
Um https://www.youtube.com/watch?v=eW1GGI55Epc On Sat, Nov 27, 2021 at 10:37 PM Chris Albertson wrote: > That article is one of the best descriptions of a harmonic drive.But > the problem is that 3D printed plastic is not strong enough to make a > practical system.Note that the aut

Re: [Emc-users] Harmonic Drive

2021-11-27 Thread Sam Sokolik
I found that a while ago - That was what I initially started to build. But the cup seems to not handle flexing. Atleast pla (I never tried it with petg). When Andy mentioned the style with no cup - I went that direction. I first made the flex gear out of pla - but it fatigued after about 6 hour

Re: [Emc-users] Spindle positioning.

2021-11-22 Thread Sam Sokolik
Can you backdrive the impact wrench? Keep it engaged? On Mon, Nov 22, 2021 at 11:45 AM John Dammeyer wrote: > Thanks Roland, > What I've found is that once the socket has reached that midpoint between > flats it sticks there. Rounding off the edges of the inside didn't fix it > but did help.

Re: [Emc-users] Getty's/fanuc 10-2000m servo

2021-11-21 Thread Sam Sokolik
Quick test seems to be 2000rpm at about 111v .4ft-lbs per amp. (8ft-lbs at 20a) On Wed, Nov 10, 2021, 9:07 AM Jon Elson wrote: > On 11/9/21 8:46 PM, Sam Sokolik wrote: > > Anyone have specs on this brushed servo from the 70's? > > > Arrgh! These Gettys motors wer

Re: [Emc-users] 7i90 ethernet link

2021-11-15 Thread Sam Sokolik
I think... It is only smart serial. (not ethernet) On Mon, Nov 15, 2021 at 10:48 AM dave engvall wrote: > Is anyone using ethernet as a link between linuxcnc and a 7i90? > Comments and/help appreciated > > Dave > > > ___ > Emc-users mailing list > Em

Re: [Emc-users] Getty's/fanuc 10-2000m servo

2021-11-10 Thread Sam Sokolik
Lol - yes.. Wondering the torque.. The only thing I found so far was around 20ft-lbs.. That would be more than enough - doing a 4:1 reduction would give us around 200ipm and over 10k pounds of push... give or take.. On Tue, Nov 9, 2021 at 9:32 PM Ed wrote: > On 11/9/21 8:46 PM, Sam Soko

[Emc-users] Getty's/fanuc 10-2000m servo

2021-11-09 Thread Sam Sokolik
Anyone have specs on this brushed servo from the 70's? ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Fwd: Requesting a short history review, if you'd be so kind.

2021-10-28 Thread Sam Sokolik
with the built in driver position control is that its tends to overcorrect for measured position errors cause by sampling jitter.' On Thu, Oct 28, 2021 at 12:35 PM Gene Heskett wrote: > On Thursday 28 October 2021 11:45:49 Sam Sokolik wrote: > > > All my machines - steppers and

Re: [Emc-users] Fwd: Requesting a short history review, if you'd be so kind.

2021-10-28 Thread Sam Sokolik
All my machines - steppers and servos are running pid.I think Peter forgot to mention - The reason PID is recommended is because it handles latency spikes way better. We have seen situations where a latency spike confuses the hell out of position mode stepgens. (ymmv) On Thu, Oct 28, 2021 a

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

2021-10-26 Thread Sam Sokolik
There was a short period of time that I almost thought about trying to get the hydraulic servos working with linuxcnc... (it didn't last long as I really didn't want to listen to the 20hp hydraulic unit running) Thinking though it I was going to try to run the servo valves with amc drives and in

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

2021-10-25 Thread Sam Sokolik
We are finally getting around to converting the 73 cincinnati milacron lathe. https://www.youtube.com/watch?v=-J7EmnRZXjw At the end of the video I show the switch that switches between 2 differently geared resolvers. On the back of the hydraulic servo is a gearbox. first is a 2.5:1 increaser

Re: [Emc-users] Square holes

2021-09-21 Thread Sam Sokolik
Tool geometry is important with the lower number of sides... ;) On Mon, Sep 20, 2021 at 3:31 PM wrote: > I couldn't think of the name. Thanks! > > -Original Message- > From: Ralph Stirling > Sent: September 20, 2021 2:53 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-u

Re: [Emc-users] Square holes

2021-09-20 Thread Sam Sokolik
please? > > That was a link or 3 to some youtube videos by Sam Sokolik, and he has > not shared the code AFAIK. Both square and hex wre demoed. Nice concept > though. > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, b

Re: [Emc-users] DC Servo issues

2021-09-19 Thread Sam Sokolik
isn't there to push the amps then following errors are likely. > > John > > > > > -Original Message- > > From: Sam Sokolik [mailto:samco...@gmail.com] > > Sent: September-19-21 12:11 PM > > To: Enhanced Machine Controller (EMC) > > Subject: Re

Re: [Emc-users] DC Servo issues

2021-09-19 Thread Sam Sokolik
Lol.. I certainly love the electrics part more than the machining most of the time... On Sun, Sep 19, 2021, 2:07 PM John Dammeyer wrote: > Hi Sam, > See below. > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > > I have never used servo drives that close the lo

Re: [Emc-users] DC Servo issues

2021-09-19 Thread Sam Sokolik
I have never used servo drives that close the loop.. I have always had great luck with normal closed loop within linuxcnc. (cheap used amc drives) (Actually - I take that back - I have used the stmbl drives. so far only for a spindle..) This is of course using mesa analog interface hardware.

Re: [Emc-users] Minimally printed rotary. Initial torque testing..

2021-09-13 Thread Sam Sokolik
encoder feedback you can quite easily have > to micro-step a number of times before you see physical motion. > > None of that matters other than that you have shown your mechanics can > handle 35 lb-ft which is all in all pretty cool ! > > John > > > > > > -Or

[Emc-users] Minimally printed rotary. Initial torque testing..

2021-09-12 Thread Sam Sokolik
Small update https://youtu.be/eW1GGI55Epc ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Force homed signal

2021-08-31 Thread Sam Sokolik
Pretty sure you can do this where you set the home position at homing. (So it doesn't move). The k&t homes to 38",34"',24 respectively.. it sets those positions but doesn't then move anywhere else. On Tue, Aug 31, 2021, 2:04 AM Marius wrote: > > On 2021/08/31 03:25, Leonardo Marsaglia wrote: >

Re: [Emc-users] jerk control

2021-08-17 Thread Sam Sokolik
; www.patreon.com/theferalengineer > > On Tue, Aug 17, 2021, 9:36 PM Sam Sokolik wrote: > > > It would be the same setup... Just using servo amps.. Velocity out of > > the pid - position back from the encoders. > > > > On Tue, Aug 17, 2021, 8:14 PM andrew beck

Re: [Emc-users] jerk control

2021-08-17 Thread Sam Sokolik
It would be the same setup... Just using servo amps.. Velocity out of the pid - position back from the encoders. On Tue, Aug 17, 2021, 8:14 PM andrew beck wrote: > Not sure Sam. > > I have a 7i77 on this mill though also. So analog control > > On Wed, Aug 18, 2021, 12:51

Re: [Emc-users] jerk control

2021-08-17 Thread Sam Sokolik
I am going to ask a stuid question.. If you have a velocity run step gen with pid. Couldn't you hook a limit3 between the pid and steghen. Because the input is velocity instead of position - wouldn't the acceleration limit in the limit3 be jerk instead of acceleration? I am sure it doesn't wor

Re: [Emc-users] Something went wrong.

2021-08-07 Thread Sam Sokolik
Are these running single ended? Have you tried it with the spindle running? sam On Sat, Aug 7, 2021 at 11:33 AM John Dammeyer wrote: > Hi Jon, > > From: Jon Elson [mailto:el...@pico-systems.com] > > On 8/4/21 1:53 AM, John Dammeyer wrote: > > > In fact, a bit more work just now shows that the

Re: [Emc-users] Lathe Spindle Drive Questions

2021-07-26 Thread Sam Sokolik
Is there a reduction? What is the rated rpm? On Mon, Jul 26, 2021, 6:03 PM andrew beck wrote: > I would suggest a closed loop ac Vfd drive with encoder. They are > awesome. > > I normally. Buy schiender altivar 71 drives cheap second hand. > > But most brands have them. > > Second option is a

Re: [Emc-users] Power Tapping

2021-07-07 Thread Sam Sokolik
I just use whatever I have... Sometimes I peck tap when I am using a hand tap. A good spiral tap or one the shoots the shavings out the end (don't remember what they are called) Like this one.. (you catch the shavings coming out the bottom..) https://youtu.be/E2t0y2EsSO8?t=483 You get used t

Re: [Emc-users] 3D Printing + LinuxCNC

2021-06-29 Thread Sam Sokolik
Really? I am remembering similar to Todd.. t thought rotary circular arc wasn't implemented yet... (That would be exciting) On Tue, Jun 29, 2021, 2:02 PM andy pugh wrote: > On Tue, 29 Jun 2021 at 19:39, andrew beck > wrote: > > > > Mate it would be so good to get this 9 axis tp working. Hav

Re: [Emc-users] Question about Raspberry Pi 4 reliability

2021-06-13 Thread Sam Sokolik
I have been happy with it. Not been using the PI for production - mostly just tinkering.Doing some pretty complicated configs. I have had it up for many days at a time with no issues... Running programs that run hours... sam On Sun, Jun 13, 2021 at 4:37 AM Gene Heskett wrote: > On Sunday

Re: [Emc-users] Pi4 issues with MESA 7i92H

2021-06-11 Thread Sam Sokolik
That would be something to try.. Maybe mesaflash doesn't know how to handle the 192.168.1.1 ip address? Set the pie to something else like 192.168.1.10 On Fri, Jun 11, 2021 at 11:25 AM Mark Wendt wrote: > On Fri, Jun 11, 2021 at 12:09 PM John Dammeyer > wrote: > > > Sam, > > Here's the ifconf

Re: [Emc-users] Pi4 issues with MESA 7i92H

2021-06-11 Thread Sam Sokolik
92.168.1.121 and the fact that I can > use the CNC suggest all is good. > > I can try adding that /24 to see if it makes a difference but first I'd > like to know why it's needed. > ... > No change. LinuxCNC still moves things. But mesaflash comes up with the > same e

Re: [Emc-users] Pi4 issues with MESA 7i92H

2021-06-11 Thread Sam Sokolik
I just used mesaflash the other day on the rpi4 for the 7i92. It has been a while but I think I followed the network directions here... https://gnipsel.com/linuxcnc/uspace/rpi4-eth.html On Fri, Jun 11, 2021, 12:58 AM Ralph Stirling wrote: > Did you set a static ip for the pi in /etc/dhcpcd.co

Re: [Emc-users] CUI devices

2021-06-09 Thread Sam Sokolik
; > > For what is lts worth you can get a 2500ppr encoder for 30usd from my > servo > > supplier. > > > > Or a a 5000ppr. > > > > Or you can go absolute. And get a 13 something ppr encoder. They > are > > about 70usd I think > > > > I

Re: [Emc-users] CUI devices

2021-06-09 Thread Sam Sokolik
in the datasheet the accuracy 0.2 degrees so, in my mind, it is no better than a 1800 count encoder if that.. I have used them in the past - they work ok for things like spindle feedback. In my experience - for servo positioning feedback - it is too noisy.. https://www.youtube.com/watch?v=8RW

Re: [Emc-users] Freenode Shenagins

2021-05-19 Thread Sam Sokolik
well poop. On Wed, May 19, 2021 at 11:44 AM Chad Woitas wrote: > > From the discord this morning: > https://gist.github.com/joepie91/df80d8d36cd9d1bde46ba018af497409 > > It seems the Freenode IRC future is in question. Does this affect the > Linuxcnc IRC? > > > > > >

Re: [Emc-users] Rpi4B OS

2021-04-07 Thread Sam Sokolik
I have always used DD to create the images. You just have to make sure you are writing the IMG not the ZIP Something like sudo dd bs=4M if=~/Downloads/2020-05-01-linuxcnc-pi4.img of=/dev/mmcblk0 sam On Wed, Apr 7, 2021 at 12:23 PM John Dammeyer wrote: > Even for the initial upgrading of

Re: [Emc-users] [Emc-developers] Home_use_index issue revisited

2021-04-04 Thread Sam Sokolik
Trying to use the index functionality is adding a layer of complexity you don't need. Just and the 2 switches together and run them into the home input. On Sun, Apr 4, 2021, 10:44 AM Feral Engineer wrote: > That might be worth a try. > > Is it safe to load the build bot master repository on a

Re: [Emc-users] Rotary axis preview (in axis interface)

2021-03-31 Thread Sam Sokolik
moving into the work to cut and out to > retract. X moves along the graduations and AX move to draw the letters. > > So something else in the INI or HAL file is still confusing the system. > > John > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > > You n

Re: [Emc-users] Rotary axis preview (in axis interface)

2021-03-31 Thread Sam Sokolik
You need in the display section of the INI file GEOMETRY = AXYZ On Wed, Mar 31, 2021, 5:00 PM John Dammeyer wrote: > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png > > > Alrigh

Re: [Emc-users] Rotary axis preview (in axis interface)

2021-03-31 Thread Sam Sokolik
I think you grabbed the old version - at the top of the post he has a link to the end of the post... :) https://forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-cylinders?start=10#116888 Maybe <_feed> wasn't used the way it is now in 2018 It now seems to be a read only variab

Re: [Emc-users] Rotary axis preview (in axis interface)

2021-03-31 Thread Sam Sokolik
90 degree jumps when > I was making tap hats, drilling and tapping 4 holes for 4 grub screws to > grab the flats of a tap. I did do a circular engrave once but was not > impressed with the font and didn't waste any more material. So I can't > offer any magic incantations, s

Re: [Emc-users] Rotary axis preview (in axis interface)

2021-03-30 Thread Sam Sokolik
This might make a bit more sense of what I am talking about.. http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-53-52.png On Tue, Mar 30, 2021 at 6:51 PM Sam Sokolik wrote: > it makes it so the bounding box doesn;t really make sense,,, > > > http://electronicsa

Re: [Emc-users] Rotary axis preview (in axis interface)

2021-03-30 Thread Sam Sokolik
it makes it so the bounding box doesn;t really make sense,,, http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-50-41.png On Tue, Mar 30, 2021 at 6:44 PM Sam Sokolik wrote: > > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png > >

Re: [Emc-users] Rotary axis preview (in axis interface)

2021-03-30 Thread Sam Sokolik
on my A axis. > John > > > -Original Message- > > From: Sam Sokolik [mailto:samco...@gmail.com] > > Sent: March-30-21 4:05 PM > > To: Enhanced Machine Controller (EMC) > > Subject: [Emc-users] Rotary axis preview (in axis interface) > > > > Has anyone

Re: [Emc-users] Maybe a minimally printed harmonic drive?

2021-03-30 Thread Sam Sokolik
https://www.youtube.com/watch?v=JSDu81jjYFs On Mon, Mar 29, 2021 at 10:23 PM Sam Sokolik wrote: > ^ thanks andy. > > On Mon, Mar 29, 2021 at 10:23 PM Sam Sokolik wrote: > >> http://electronicsam.com/images/greenmachine/IMG_20210329_220745.jpg >> >> On Sun, Mar 2

Re: [Emc-users] Maybe a minimally printed harmonic drive?

2021-03-29 Thread Sam Sokolik
^ thanks andy. On Mon, Mar 29, 2021 at 10:23 PM Sam Sokolik wrote: > http://electronicsam.com/images/greenmachine/IMG_20210329_220745.jpg > > On Sun, Mar 28, 2021 at 5:17 PM Sam Sokolik wrote: > >> have not done any destructive testing - but finally grabbed an oem650 >

Re: [Emc-users] Maybe a minimally printed harmonic drive?

2021-03-29 Thread Sam Sokolik
http://electronicsam.com/images/greenmachine/IMG_20210329_220745.jpg On Sun, Mar 28, 2021 at 5:17 PM Sam Sokolik wrote: > have not done any destructive testing - but finally grabbed an oem650 > drive so I can have full 4 axis to play with. Seems to run the rotary > atleast as go

Re: [Emc-users] Maybe a minimally printed harmonic drive?

2021-03-28 Thread Sam Sokolik
have not done any destructive testing - but finally grabbed an oem650 drive so I can have full 4 axis to play with. Seems to run the rotary atleast as good as the leadshine. http://electronicsam.com/images/greenmachine/IMG_20210328_165552.jpg On Wed, Mar 24, 2021 at 8:36 AM Sam Sokolik wrote

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