Re: [Emc-users] Interp problems?
On 06/26/2017 02:32 PM, dave wrote: On 06/26/2017 01:46 PM, andy pugh wrote: On 26 June 2017 at 21:03, dave wrote: "home" carefully nestled between the - and + jog buttons. Now you have me curious; not certain where you are headed. Curious that you don't have a "home all" button, but where I was heading was that if you had been using "touch off" to zero the axes on a machine with NO_FORCE_HOMING configured then an incremental step towards one or other soft limit is likely. Is G53 moving? Opps! Didn't think to check. Darned! I suspect so. My standard end of program goes: G53G0Z0 G53G0X0Y7.5 ( to move out of the way of the tool) G54G90 M2 and IIRC X was considerable displaced in the + direction. Lets put this all on hold and see how things shake out with a new encoder in place and hopefully cooler temps. Tomorrow is supposed to be low 80's so about 10 degrees cooler. :-) Dave UPDATE: Just installed a replacement 2500 ppr encoder and motion is solid and makes sense. Cut the same test pocket and it looks nice and doesn't shift X between z layers. As for the zero shift it is OK for now; 100 degree weather due next week so between now and then I need to get a decent cooling fan in place for testing if things go south again. Thanks for all the thoughtful ideas and help. We'll see what warmer weather brings. Stay tuned. Only hit 87 today. Dave -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Yes, buildbot has old and new repos. A lot of the really old stuff isn't posted on buildbots homepage, but it is still there. http://buildbot.linuxcnc.org/dists/ For Lucid there are builds for 2.4 to the current 2.7 (support for 2.8+ has been dropped for it.) Simularly there is even buildbot builds for Hardy (2.4-2.6) Wheezy 2.4-Master Jessie 2.6-Master (preempt-rt only) Stretch 2.7-Master (preempt-rt only) Once Linuxcnc drops kernel support they just stop building new versions, they don't delete the old repos (at least not yet). - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 2:52:03 PM Subject: Re: [Emc-users] Rough motion with servos Hi Todd, Does buildbot go back to 10.04 times? I thought it was only for recent builds. -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Hi Peter, As far as I can tell the spikes are in the feedback velocity. It can be a little difficult to tell cause and effect. Are you using identical hal files for the system with the spikes/without spikes? When I built the 2.6.13 branch on the 2.7.9 ISO I only had to make some very minor changes to the hal files to get it to run. Les On 28/06/2017 19:48, Peter C. Wallace wrote: Did you trace the source of the PID output spikes? that is, are there glitches in feedback position of feedback velocity? The whole thing sounds very strange Are you using identical hal files for the system with the spikes/without spikes? Peter Wallace Mesa Electronics -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Hi Todd, Does buildbot go back to 10.04 times? I thought it was only for recent builds. Thanks for your contributions that became MB2HAL. I'm using it. You are welcome. If I manage to get a recent version of LCNC running you'll probably see some changes to mb2hal. For a start I want to look into why it uses so much CPU. Scanning 55 inputs and 55 outputs plus a few registers at 20Hz ends up using 25% of the CPU which seems excessive. I've just built a preempt-rt kernel for Ubuntu 16.04. I might have just enough time tonight to download and build LinuxCNC Git master. It will be interesting to see how it behaves under preempt-rt. Les On 28/06/2017 19:37, Todd Zuercher wrote: If you install from buildbot, both linuxcnc and linuxcnc-dev I am pretty sure that is all you need to be able to build hal components using halcompile. You don't have to have all of the resources to build all of Linuxcnc from source. - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 2:26:52 PM Subject: Re: [Emc-users] Rough motion with servos Hi Todd, I am building from source. I have tried several distros: Debian - something old, I can't remember what. This has been running fine for about 8 years but it lacks driver support for modern hardware. Ubuntu 10.04 LinuxCNC ISO - appears to run smoothly but I can't test properly until I get LCNC to build. It's also a bit long in the tooth. Ubuntu 16.04 LinuxCNC ISO - runs rough but I can build fine. I've tried various different branches of LinuxCNC, including one that is close to what I was originally running, on this and they all run rough. Are you sure all of your custom modules are still "custom", or needed? There have been a lot of little goodies added to Linuxcnc since 2.5-2.6 days. Yes, some of the modules do have fairly direct replacements, such as my original Modbus component and the new MB2HAl (which is based on my original). However I have extra stuff to control my spindle and electronically controlled gearbox which don't have direct replacements. Maybe they can be added using halcompile (formerly known as comp)? Yes, most are comps but I still need a working build environment. I am wondering if now would be a good time to move away from RTAI and use preempt-rt instead. My reasoning behind that is that I have two projects coming up that use HM2 ethernet boards so I'll have to work with preempt-rt at some point. Keeping everything on the same platform will simplify maintenance in the future. Les -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Did you trace the source of the PID output spikes? that is, are there glitches in feedback position of feedback velocity? The whole thing sounds very strange Are you using identical hal files for the system with the spikes/without spikes? Peter Wallace Mesa Electronics -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
PS. Thanks for your contributions that became MB2HAL. I'm using it. - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 2:26:52 PM Subject: Re: [Emc-users] Rough motion with servos Hi Todd, I am building from source. I have tried several distros: Debian - something old, I can't remember what. This has been running fine for about 8 years but it lacks driver support for modern hardware. Ubuntu 10.04 LinuxCNC ISO - appears to run smoothly but I can't test properly until I get LCNC to build. It's also a bit long in the tooth. Ubuntu 16.04 LinuxCNC ISO - runs rough but I can build fine. I've tried various different branches of LinuxCNC, including one that is close to what I was originally running, on this and they all run rough. > Are you sure all of your custom modules are still "custom", or needed? There > have been a lot of little goodies added to Linuxcnc since 2.5-2.6 days. Yes, some of the modules do have fairly direct replacements, such as my original Modbus component and the new MB2HAl (which is based on my original). However I have extra stuff to control my spindle and electronically controlled gearbox which don't have direct replacements. > Maybe they can be added using halcompile (formerly known as comp)? Yes, most are comps but I still need a working build environment. I am wondering if now would be a good time to move away from RTAI and use preempt-rt instead. My reasoning behind that is that I have two projects coming up that use HM2 ethernet boards so I'll have to work with preempt-rt at some point. Keeping everything on the same platform will simplify maintenance in the future. Les -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
If you install from buildbot, both linuxcnc and linuxcnc-dev I am pretty sure that is all you need to be able to build hal components using halcompile. You don't have to have all of the resources to build all of Linuxcnc from source. - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 2:26:52 PM Subject: Re: [Emc-users] Rough motion with servos Hi Todd, I am building from source. I have tried several distros: Debian - something old, I can't remember what. This has been running fine for about 8 years but it lacks driver support for modern hardware. Ubuntu 10.04 LinuxCNC ISO - appears to run smoothly but I can't test properly until I get LCNC to build. It's also a bit long in the tooth. Ubuntu 16.04 LinuxCNC ISO - runs rough but I can build fine. I've tried various different branches of LinuxCNC, including one that is close to what I was originally running, on this and they all run rough. > Are you sure all of your custom modules are still "custom", or needed? There > have been a lot of little goodies added to Linuxcnc since 2.5-2.6 days. Yes, some of the modules do have fairly direct replacements, such as my original Modbus component and the new MB2HAl (which is based on my original). However I have extra stuff to control my spindle and electronically controlled gearbox which don't have direct replacements. > Maybe they can be added using halcompile (formerly known as comp)? Yes, most are comps but I still need a working build environment. I am wondering if now would be a good time to move away from RTAI and use preempt-rt instead. My reasoning behind that is that I have two projects coming up that use HM2 ethernet boards so I'll have to work with preempt-rt at some point. Keeping everything on the same platform will simplify maintenance in the future. Les -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Hi Todd, I am building from source. I have tried several distros: Debian - something old, I can't remember what. This has been running fine for about 8 years but it lacks driver support for modern hardware. Ubuntu 10.04 LinuxCNC ISO - appears to run smoothly but I can't test properly until I get LCNC to build. It's also a bit long in the tooth. Ubuntu 16.04 LinuxCNC ISO - runs rough but I can build fine. I've tried various different branches of LinuxCNC, including one that is close to what I was originally running, on this and they all run rough. Are you sure all of your custom modules are still "custom", or needed? There have been a lot of little goodies added to Linuxcnc since 2.5-2.6 days. Yes, some of the modules do have fairly direct replacements, such as my original Modbus component and the new MB2HAl (which is based on my original). However I have extra stuff to control my spindle and electronically controlled gearbox which don't have direct replacements. Maybe they can be added using halcompile (formerly known as comp)? Yes, most are comps but I still need a working build environment. I am wondering if now would be a good time to move away from RTAI and use preempt-rt instead. My reasoning behind that is that I have two projects coming up that use HM2 ethernet boards so I'll have to work with preempt-rt at some point. Keeping everything on the same platform will simplify maintenance in the future. Les -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: Chinese linear encoders
I have 3 of them on my mill, but not so long, only 300 mm. Repetability is good, about +-0.01 mm. I don't have any means to verify accuracy at that precision over that distance, but I don't need it, either. On 28.06.2017 20:20, Eric Keller wrote: Anyone tried them? I need a 30" encoder for my lathe. I see ones on ebay for <$150. They don't seem to be differential at that price though. I have an accurite dro, but one of the encoders isn't long enough. -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Are you trying to build Linuxcnc from source or installing/updating LInuxcnc from Buildbot? I'm still not sure what distro you are working with. (You seem to have talked about several.) I have not tried to build from source on Lucid for a very long time. (But I do recall having a great deal of difficulty meeting all the dependencies.) Are you sure all of your custom modules are still "custom", or needed? There have been a lot of little goodies added to Linuxcnc since 2.5-2.6 days. Maybe they can be added using halcompile (formerly known as comp)? - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 12:51:51 PM Subject: Re: [Emc-users] Rough motion with servos Hi Todd, I did that but I can't build because it needs Python >=2.7 and the repositories only contain 2.6. I tried a very basic test config with with the version that is shipped with 2.7.9 and it appeared to run smoothly, at least once I figured out I needed to pet the watchdog. I'm not going to admit how long it took me to figure that one out :-[ I can't run my lathe properly because it depends on a bunch of custom modules which I can't sort out until I can build LinuxCNC. Les On 28/06/2017 12:31, Todd Zuercher wrote: > Yes, the latest v2.7.9 will run on the older Ubuntu 10.04 ISOs. > They can be down loaded here: > http://linuxcnc.org/iso/ > > Forgot to mention, You will need to change the old Ubuntu repo lines. > > deb http://linuxcnc.org lucid base 2.7-rtai > deb http://old-releases.ubuntu.com/ubuntu/ lucid main restricted universe > multiverse > deb http://old-releases.ubuntu.com/ubuntu/ lucid-updates main restricted > universe multiverse > deb http://old-releases.ubuntu.com/ubuntu/ lucid-security main restricted > universe multiverse > deb http://old-releases.ubuntu.com/ubuntu/ lucid-backports main restricted > universe multiverse > > - Original Message - > From: "Les Newell" > To: "Enhanced Machine Controller (EMC)" > Sent: Wednesday, June 28, 2017 4:50:38 AM > Subject: Re: [Emc-users] Rough motion with servos > > Is there any way to install an older RTAI version? > > Les > > > -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] OT: Chinese linear encoders
Anyone tried them? I need a 30" encoder for my lathe. I see ones on ebay for <$150. They don't seem to be differential at that price though. I have an accurite dro, but one of the encoders isn't long enough. -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Hi Todd, I did that but I can't build because it needs Python >=2.7 and the repositories only contain 2.6. I tried a very basic test config with with the version that is shipped with 2.7.9 and it appeared to run smoothly, at least once I figured out I needed to pet the watchdog. I'm not going to admit how long it took me to figure that one out :-[ I can't run my lathe properly because it depends on a bunch of custom modules which I can't sort out until I can build LinuxCNC. Les On 28/06/2017 12:31, Todd Zuercher wrote: Yes, the latest v2.7.9 will run on the older Ubuntu 10.04 ISOs. They can be down loaded here: http://linuxcnc.org/iso/ Forgot to mention, You will need to change the old Ubuntu repo lines. deb http://linuxcnc.org lucid base 2.7-rtai deb http://old-releases.ubuntu.com/ubuntu/ lucid main restricted universe multiverse deb http://old-releases.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse deb http://old-releases.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse deb http://old-releases.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 4:50:38 AM Subject: Re: [Emc-users] Rough motion with servos Is there any way to install an older RTAI version? Les -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
On 06/28/2017 03:50 AM, Les Newell wrote: OK, Tried the usual reseating components etc and that PC does not want to play. I found a Dell SFF PC in the junk pile. After hacking it to take a full size PCI card I fired it up. Running my old Debian + LinuxCNC 2.6.0 it runs smooth. Latency jitter is 7us,10us. Running the latest LinuxCNC image installed on an SSD it runs rough, latency jitter is 37us,16us. 2.6.0 won't build on the latest image but I built 2.6.13 and it also runs rough, though maybe not quite as rough as 2.7.9. Is there any way to install an older RTAI version? I'm pretty sure some of the older ISO files are available, but may not be listed directly on linuxcnc.org Check with uname -a to see what kernel you are using, it might be a preempt kernel, which will have worse latency than rtai. But, 37 us shouldn't cause serious problems, so I'm thinking it probably is not the kernel, but something to do with the PID. Jon -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EMC traffic
You would not want to do houseplans in Openscad. It has no provisions for making 2d views or projections, and no provision for dimension lines or text. I use Openscad quite a bit for parts I will 3d print. Sometimes I create by basic part geometry in Openscad, the import it into Freecad (the only other tool that can use ,scad files) and apply fillets or other niceties that are difficult in Openscad. Freecad has python scripting, so you could "program" a part. It also has some capability for 2d views with dimensioning, although it is very much a work in progress. -- Ralph On Jun 27, 2017 11:54 PM, Erik Christiansen wrote: Sorry for the late reply - just back from a week on the farm. (Soil test done, so foundation & slab design can now go ahead.) On 21.06.17 13:16, andy pugh wrote: > On 20 June 2017 at 08:50, Erik Christiansen wrote: > > > Incidentally, I've found that the Postscript printer language is sorta > > almost like gcode on steroids. Fighting with a GUI drawing package > > gives me chest pains, without producing useful output, > > > > Have you seen OpenSCAD? 3D CAD at the command line. > > An example usage: https://youtu.be/IPtF5c8o-10?t=4m30s Nooo, heard the name, but never seen it before. It is clearly much more powerful, as it handles 3D - very nice. (Assuming the "Open" means it runs on linux.) Fortunately, there's not a lot lost in this particular use case, as floorplans, elevations, sections, and site plan are all 2D. However, I have had to explicitly define variables, as described upthread, to automate transfer of e.g. truss length from floorplan to sectioned elevation. (So, yes, using Postscript is a hack.) Postscript is quite efficient, though, as I've produced 8 drawings with 798 lines of text. And there's a lot of detail in the floorplan, and a reasonable amount in the sections. The drawings are all done, except for some details on the site plan, so I've missed the boat for drawing it all in OpenSCAD. What I will do is look at that for 3D design, once I've built and the mill & lathe are in their new home. (Off-grid, solar powered, maybe with a 10 kWh Zinc-Bromine flow battery for filling in during clouds, and for evenings. Hopefully the price will diminish a little bit in the next 18 months. Down under, it's the northern roof plane which will carry the 6 to 7 kw PV array.) Erik -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Yes, the latest v2.7.9 will run on the older Ubuntu 10.04 ISOs. They can be down loaded here: http://linuxcnc.org/iso/ Forgot to mention, You will need to change the old Ubuntu repo lines. deb http://linuxcnc.org lucid base 2.7-rtai deb http://old-releases.ubuntu.com/ubuntu/ lucid main restricted universe multiverse deb http://old-releases.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse deb http://old-releases.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse deb http://old-releases.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 4:50:38 AM Subject: Re: [Emc-users] Rough motion with servos Is there any way to install an older RTAI version? Les -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
Yes, the latest v2.7.9 will run on the older Ubuntu 10.04 ISOs. They can be down loaded here: http://linuxcnc.org/iso/ - Original Message - From: "Les Newell" To: "Enhanced Machine Controller (EMC)" Sent: Wednesday, June 28, 2017 4:50:38 AM Subject: Re: [Emc-users] Rough motion with servos OK, Tried the usual reseating components etc and that PC does not want to play. I found a Dell SFF PC in the junk pile. After hacking it to take a full size PCI card I fired it up. Running my old Debian + LinuxCNC 2.6.0 it runs smooth. Latency jitter is 7us,10us. Running the latest LinuxCNC image installed on an SSD it runs rough, latency jitter is 37us,16us. 2.6.0 won't build on the latest image but I built 2.6.13 and it also runs rough, though maybe not quite as rough as 2.7.9. Is there any way to install an older RTAI version? Les On 28/06/2017 02:13, Jon Elson wrote: > On 06/27/2017 03:06 PM, Les Newell wrote: >> Hmm, looks like that was a red herring. The problem is back. I can't >> do any more testing because the pixies inside the old computer >> finally abandoned ship and it now no longer boots. Doesn't even post. >> My priority now is going to be to find a box that will run my old EMC. >> > Whenever this happens, I reseat the memory sticks and maybe even the > CPU and that often brings it back. > Of course, it could have suffered the capacitor plague. > > Jon -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rough motion with servos
OK, Tried the usual reseating components etc and that PC does not want to play. I found a Dell SFF PC in the junk pile. After hacking it to take a full size PCI card I fired it up. Running my old Debian + LinuxCNC 2.6.0 it runs smooth. Latency jitter is 7us,10us. Running the latest LinuxCNC image installed on an SSD it runs rough, latency jitter is 37us,16us. 2.6.0 won't build on the latest image but I built 2.6.13 and it also runs rough, though maybe not quite as rough as 2.7.9. Is there any way to install an older RTAI version? Les On 28/06/2017 02:13, Jon Elson wrote: On 06/27/2017 03:06 PM, Les Newell wrote: Hmm, looks like that was a red herring. The problem is back. I can't do any more testing because the pixies inside the old computer finally abandoned ship and it now no longer boots. Doesn't even post. My priority now is going to be to find a box that will run my old EMC. Whenever this happens, I reseat the memory sticks and maybe even the CPU and that often brings it back. Of course, it could have suffered the capacitor plague. Jon -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
