Re: [Emc-users] MESA 8i20 and enable signal
Did you read this: On 08/07/2013 07:08 AM, Peter C. Wallace wrote: Take a look at max_current - it does not exist. There are three parameters current-maxlim, current-minlim, current-scalemax instead. While in man9 we can see description of pin (bit, in) amp-enable Set this pin high to enable the drive., which I can't find in my halshow. ? -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Planning phase for new machine, need decision support
On Tue, 6 Aug 2013 22:11:42 -0400, you wrote: On Tue, Aug 6, 2013 at 9:13 AM, Stephen Dubovsky smdubov...@gmail.com wrote: Something to remember w/ steppers is that they produce no torque at rest. Here's what you have to remember about steppers: Zero torque at zero speed, and zero torque at maximum speed :) Old wives tale. Steve Blackmore -- -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Planning phase for new machine, need decision support
2013/8/6 Dave e...@dc9.tzo.com ... Here is some free motor sizing software that seems to be quite accurate. A number of Servo drive companies use this software and they brand label it.. http://visualsizer.com/ It is entirely free. I have used the Visual Sizer XP for years and it is really good but takes some effort to figure out how to run it even though it is very graphical. ... Dave i did try it out but there's something that I miss. I tried a 10 m/min calculation with a 5 mm pitch screw and it ended up with a needed RPM from motor at 60.69 RPM... /S -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
Hi everybody, My name is Paul Lacatus and I am quite new on this list. I am using LinuxCNC for a few months on my Proxxon MF70 converted to CNC. Up to this moment I am using an old Pentium 1GHz for this job as standalone computer. . Right not the computer is bigger than the mill and on the work table the computer is occupying more then 70% with a display and keyboard. I have read something about the implementation of LinuxCNC on BeagleBone Black. I have available a BeagleBone white ( 720 MHz 256 MB ram) . My questions now : 1. Is this card strong enough for running LinuxCNC headless ? Or should I get a BeagleBone Black (1GHz / 512 MB ? 2. I need a display and keyboard near the Proxxon for setting and control . If I am using BBW can I use a Raspberry Pi for X11 server ? In that case running Axis can be overkill for BBW ( grafic acceleration is in Raspi ) ? 3. If I have already the driver board controlled by LPT port of the computer did I need and extra hardware of interfacing BeagleBone or a simple logic level conversion is enough. Paul -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MESA 8i20 and enable signal
On 7 August 2013 03:55, propcoder marius.alks...@gmail.com wrote: I mean driver parameters and pins and latest hostmot2 manual, where I find 8i20 is http://www.linuxcnc.org/docs/html/man/man9/hostmot2.9.html#8i20 That's the 2.5.3 documentation. Now I checked command man sserial and found: hm2_5i25.0.8i20.0.1.current-maxlim hm2_5i25.0.8i20.0.1.current-minlim hm2_5i25.0.8i20.0.1.current-scalemax You are running master: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?UpdatingConfigurationsForDevelopmentVersions -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MESA 8i20 and enable signal
On 7 August 2013 10:05, andy pugh bodge...@gmail.com wrote: find 8i20 is http://www.linuxcnc.org/docs/html/man/man9/hostmot2.9.html#8i20 That's the 2.5.3 documentation. Docs for Master are here: http://www.linuxcnc.org/docs/devel/html/ -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A puzzler
On 7 August 2013 01:14, TJoseph Powderly tjt...@gmail.com wrote: cosine err? I don't think so. The main reason not to think so is that he has measured the error as non-linear (I am awaiting the actual numbers) A cosine error of .158mm in 50 would mean an inclination of 4.5 degrees which seems like it would be obvious. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 7 August 2013 08:30, Paul Lacatus p...@paul-lacatus.ro wrote: 2. I need a display and keyboard near the Proxxon for setting and control . If I am using BBW can I use a Raspberry Pi for X11 server ? In that case running Axis can be overkill for BBW ( grafic acceleration is in Raspi ) ? I don't think it is strictly necessary to run the BBW or BBB headless. It is just about possible to run the Axis GUI and move hardware with the Raspberry Pi. (Not that I can recommend that, the RPi step generator doesn't actually appear to work properly). Or is there a strong reason that BBB installations have to run headless? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Planning phase for new machine, need decision support
On 7 August 2013 08:24, Sven Wesley svenne.d...@gmail.com wrote: i did try it out but there's something that I miss. I tried a 10 m/min calculation with a 5 mm pitch screw and it ended up with a needed RPM from motor at 60.69 RPM... I don't know what you did there, unless you are not coupling screw to motor 1:1 10m is 2000 turns of the screw. So 10m/min is 2000 rpm. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Planning phase for new machine, need decision support
2013/8/7 andy pugh bodge...@gmail.com On 7 August 2013 08:24, Sven Wesley svenne.d...@gmail.com wrote: i did try it out but there's something that I miss. I tried a 10 m/min calculation with a 5 mm pitch screw and it ended up with a needed RPM from motor at 60.69 RPM... I don't know what you did there, unless you are not coupling screw to motor 1:1 10m is 2000 turns of the screw. So 10m/min is 2000 rpm. You don't have to tell me that. ;) -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MESA 8i20 and enable signal
2013.08.07 12:07, andy pugh rašė: Docs for Master are here:http://www.linuxcnc.org/docs/devel/html/ Yes, but I can't find a word about 8i20 there. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
Paul Why dont you just put an Atom pc together at a fraction of the cost for a BB and other hardware to run your Linuxcnc. Or at least at the same cost but with no hassles of any nature. On 2013/08/07 09:30 AM, Paul Lacatus wrote: Hi everybody, My name is Paul Lacatus and I am quite new on this list. I am using LinuxCNC for a few months on my Proxxon MF70 converted to CNC. Up to this moment I am using an old Pentium 1GHz for this job as standalone computer. . Right not the computer is bigger than the mill and on the work table the computer is occupying more then 70% with a display and keyboard. I have read something about the implementation of LinuxCNC on BeagleBone Black. I have available a BeagleBone white ( 720 MHz 256 MB ram) . My questions now : 1. Is this card strong enough for running LinuxCNC headless ? Or should I get a BeagleBone Black (1GHz / 512 MB ? 2. I need a display and keyboard near the Proxxon for setting and control . If I am using BBW can I use a Raspberry Pi for X11 server ? In that case running Axis can be overkill for BBW ( grafic acceleration is in Raspi ) ? 3. If I have already the driver board controlled by LPT port of the computer did I need and extra hardware of interfacing BeagleBone or a simple logic level conversion is enough. Paul -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130806-1, 2013/08/06 Tested on: 2013/08/07 12:59:15 PM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
Your idea is interesting but an Atom board is at a fraction of BB cost that is about 50 Euro ? And what about parallel ports on atom boards ? I will check. Thank you ! PS The BBW is just laying on my table ;) Paul On 07.08.2013 13:59, Marius Liebenberg wrote: Paul Why dont you just put an Atom pc together at a fraction of the cost for a BB and other hardware to run your Linuxcnc. Or at least at the same cost but with no hassles of any nature. On 2013/08/07 09:30 AM, Paul Lacatus wrote: Hi everybody, My name is Paul Lacatus and I am quite new on this list. I am using LinuxCNC for a few months on my Proxxon MF70 converted to CNC. Up to this moment I am using an old Pentium 1GHz for this job as standalone computer. . Right not the computer is bigger than the mill and on the work table the computer is occupying more then 70% with a display and keyboard. I have read something about the implementation of LinuxCNC on BeagleBone Black. I have available a BeagleBone white ( 720 MHz 256 MB ram) . My questions now : 1. Is this card strong enough for running LinuxCNC headless ? Or should I get a BeagleBone Black (1GHz / 512 MB ? 2. I need a display and keyboard near the Proxxon for setting and control . If I am using BBW can I use a Raspberry Pi for X11 server ? In that case running Axis can be overkill for BBW ( grafic acceleration is in Raspi ) ? 3. If I have already the driver board controlled by LPT port of the computer did I need and extra hardware of interfacing BeagleBone or a simple logic level conversion is enough. Paul -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 07.08.2013 12:35, andy pugh wrote: On 7 August 2013 08:30, Paul Lacatus p...@paul-lacatus.ro wrote: 2. I need a display and keyboard near the Proxxon for setting and control . If I am using BBW can I use a Raspberry Pi for X11 server ? In that case running Axis can be overkill for BBW ( grafic acceleration is in Raspi ) ? I don't think it is strictly necessary to run the BBW or BBB headless. It is just about possible to run the Axis GUI and move hardware with the Raspberry Pi. (Not that I can recommend that, the RPi step generator doesn't actually appear to work properly). Or is there a strong reason that BBB installations have to run headless? As far as I understood from what I found on the net the BBB grafic is not quite performant it is only a interface from the LCD interface existing also on the BBW to HDMI. In that case the load on the processor for displaying AXIS is important. That why my idea was to move this burden od x11 server to another machine that is better prepared for this job. The problem with RPI is that the real time kernel modules are not implemented and the access to GPIO in not fast enough for Linux CNC . This infos I got from the net maybe I am wrong. Paul -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MESA 8i20 and enable signal
On 7 August 2013 11:22, propcoder marius.alks...@gmail.com wrote: Docs for Master are here:http://www.linuxcnc.org/docs/devel/html/ Yes, but I can't find a word about 8i20 there. For full details of the smart-serial devices see man sserial. http://www.linuxcnc.org/docs/devel/html/man/man9/sserial.9.html -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 7 August 2013 12:44, Paul Lacatus p...@paul-lacatus.ro wrote: As far as I understood from what I found on the net the BBB grafic is not quite performant There are more graphically lightweight alternatives to Axis available. For example: http://www.linuxcnc.org/docs/devel/html/gui/tklinuxcnc.html http://www.linuxcnc.org/docs/devel/html/gui/mini.html And one that runs in a terminal window http://www.linuxcnc.org/docs/devel/html/gui/keystick.html The problem with RPI is that the real time kernel modules are not implemented and the access to GPIO in not fast enough for Linux CNC . This infos I got from the net maybe I am wrong. I wasn't suggesting that you should use the RPi as a controller, I was just saying that it is capable of simultaneous step generation and Axis GUI display, and is a lot less powerful than the BB (As far as I am aware) It doesn't work properly though, so I don't recommend it. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
2013/8/7 Paul Lacatus p...@paul-lacatus.ro Your idea is interesting but an Atom board is at a fraction of BB cost that is about 50 Euro ? And what about parallel ports on atom boards ? I will check. Thank you ! PS The BBW is just laying on my table ;) Beaglebone costs around 50 eur (at least in my country) and it has cpu and ram onboard, sd card costs ~10 eur, any power supply with 5 vdc output can be used for it (including unnecessary phone charger). Atom ITX boards cost around 70 eur and it has cpu on board. You still need ram and hdd, which will require additional 20-30 eur and also pc psu for another 20 eur. And double check any new Atom ITX boards - AFAIK there are issues with drivers for Linux of their gpu chip, which mean problems with realtime performance. BTW Beaglebone is much easier to mount somewhere in the electronics cabinet. The only thing that keeps me from using Beaglebone are the emails about hdmi and pru fight for particular pins, so there were some difficulties about them. I know that Charles has a working solution, but I do not know any details. Disabling hdmi and running the beaglebone headless is definitely a solution, but I know that I am not that advanced to set up something like that. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 07.08.2013 15:03, Viesturs Lācis wrote: 2013/8/7 Paul Lacatus p...@paul-lacatus.ro Your idea is interesting but an Atom board is at a fraction of BB cost that is about 50 Euro ? And what about parallel ports on atom boards ? I will check. Thank you ! PS The BBW is just laying on my table ;) BTW Beaglebone is much easier to mount somewhere in the electronics cabinet The only thing that keeps me from using Beaglebone are the emails about hdmi and pru fight for particular pins, so there were some difficulties about them. I know that Charles has a working solution, but I do not know any details. Disabling hdmi and running the beaglebone headless is definitely a solution, but I know that I am not that advanced to set up something like that. the BBW that I already have has no HDMI but has also low specifications ( comparable with RasPi that I also have 720MHz Cortex , 256 MB ) than BBB . I am prepared to use it headless with X11 server on other machine . That why I proposed Raspi for an X11 server. I like Axis toolpath preview and I don't want to loose it ;). On BBB I heard That is a bridge cape that is solving the pin problems. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 7 August 2013 13:26, Paul Lacatus p...@paul-lacatus.ro wrote: . That why I proposed Raspi for an X11 server. I think I forgot to say: Your proposed combination ought to work well. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 07.08.2013 15:35, andy pugh wrote: Your proposed combination ought to work well My problem is that I need more info about LinuxCNC on BB(W/B) that I hope to find here on the mailing list . This other questions still remains: 1. Is this card ( BBW 720MHz 256 MB ) strong enough for running LinuxCNC headless ? Or should I get a BeagleBone Black (1GHz / 512 MB ? 3. If I have already the stepper driver board controlled by LPT port of the computer did I need and extra hardware of interfacing BeagleBone or a simple logic level conversion is enough. Paul -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
2013/8/7 Paul Lacatus p...@paul-lacatus.ro 1. Is this card ( BBW 720MHz 256 MB ) strong enough for running LinuxCNC headless ? Since you already have the Beagle, I would say that there is only one way to find this out for sure :)) 3. If I have already the stepper driver board controlled by LPT port of the computer did I need and extra hardware of interfacing BeagleBone or a simple logic level conversion is enough. Since step/dir signals would be generated by PRUs on Beagle, all you need is make sure about matching signal levels. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 8/7/2013 8:26 AM, Paul Lacatus wrote: On 07.08.2013 15:03, Viesturs Lācis wrote: 2013/8/7 Paul Lacatus p...@paul-lacatus.ro Your idea is interesting but an Atom board is at a fraction of BB cost that is about 50 Euro ? And what about parallel ports on atom boards ? I will check. Thank you ! PS The BBW is just laying on my table ;) BTW Beaglebone is much easier to mount somewhere in the electronics cabinet The only thing that keeps me from using Beaglebone are the emails about hdmi and pru fight for particular pins, so there were some difficulties about them. I know that Charles has a working solution, but I do not know any details. Disabling hdmi and running the beaglebone headless is definitely a solution, but I know that I am not that advanced to set up something like that. the BBW that I already have has no HDMI but has also low specifications ( comparable with RasPi that I also have 720MHz Cortex , 256 MB ) than BBB . I am prepared to use it headless with X11 server on other machine . That why I proposed Raspi for an X11 server. I like Axis toolpath preview and I don't want to loose it ;). On BBB I heard That is a bridge cape that is solving the pin problems. Paul: Which are you---a machinist who wants to make chips fly or a computer enthusiast who wants to play with new hardware/software combos? Please don't think I'm being snarky. A machinist who wants a solution which just works would either stick with the oversize AT/ATX computer you already have or substitute a downsized, presumably Intel Atom-equipped microATX board with an onboard parallel port. The LinuxCNC wiki contains latency test data for some of these boards. The archive of this list contains messages about the headaches caused by the onboard graphics controllers of certain of these boards. If you're willing to use a RPi as the Xserver for a BBW then you should have no problem using it as well for any x86-based controller if the onboard graphics don't work out. I'm actually a great fan of separate Xserver terminals---what we used to call an Xterm, aka thin client, last century. The neat thing is, you can try this approach right now to see if you like it, using your existing LinuxCNC as the Xclient. A computer enthusiast, on the other hand, may well wish to wade into the ARM world. There is furious activity on several levels in the LinuxCNC community which tends to be reported in more detail on the companion emc-developers mail list. I'm at the periphery of the developers, helping more to test their work than to contribute to it. Impressive gains have been made and there are some striking results (see for example Charles Steinkuehler's YouTube videos of his 3d printing) but I'd have to characterize the whole of the work as not yet ready for prime time but real soon now from the standpoint of the common user. Not only customized LinuxCNC software but also customized capes/interface boards are emerging should you choose to play. If I had to compare the total cost of ownership (TCO) of the two approaches as opposed to the first cost of the motherboard, I'd have to say they are roughly equal, especially if one puts a dollar/euro/leu value on one's time. [Please, gentle readers, don't start an email storm over this observation. If you like, I'll restate it as all hardware approaches cost more than you expected.] Regards, Kent -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On Wed, Aug 7, 2013 at 3:30 AM, Paul Lacatus p...@paul-lacatus.ro wrote: I have read something about the implementation of LinuxCNC on BeagleBone Black. I have available a BeagleBone white ( 720 MHz 256 MB ram) . My questions now : 1. Is this card strong enough for running LinuxCNC headless ? Or should I get a BeagleBone Black (1GHz / 512 MB ? I think it's clear that a BBW is capable, but it would be cheaper to get an atom at this point in time. There are no low-cost i/o interfaces. The BeBoPr is really nice, but it costs about the same as an Atom computer. This could change at any time, but right now it would be much faster and cost less to get an Atom. A BBB would be ideal if space is an issue, which it always is. But it's still a work in progress, whereas an atom would be ready to go. Eric -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 07.08.2013 16:22, Viesturs Lācis wrote: 2013/8/7 Paul Lacatus p...@paul-lacatus.ro 1. Is this card ( BBW 720MHz 256 MB ) strong enough for running LinuxCNC headless ? Since you already have the Beagle, I would say that there is only one way to find this out for sure :)) You are right . I will get a 4GB MicroSD card to test my BBW 3. If I have already the stepper driver board controlled by LPT port of the computer did I need and extra hardware of interfacing BeagleBone or a simple logic level conversion is enough. Since step/dir signals would be generated by PRUs on Beagle, all you need is make sure about matching signal levels. Thank you Viesturs. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 07.08.2013 16:28, Kent A. Reed wrote: On 8/7/2013 8:26 AM, Paul Lacatus wrote: On 07.08.2013 15:03, Viesturs Lācis wrote: 2013/8/7 Paul Lacatus p...@paul-lacatus.ro Your idea is interesting but an Atom board is at a fraction of BB cost that is about 50 Euro ? And what about parallel ports on atom boards ? I will check. Thank you ! PS The BBW is just laying on my table ;) BTW Beaglebone is much easier to mount somewhere in the electronics cabinet The only thing that keeps me from using Beaglebone are the emails about hdmi and pru fight for particular pins, so there were some difficulties about them. I know that Charles has a working solution, but I do not know any details. Disabling hdmi and running the beaglebone headless is definitely a solution, but I know that I am not that advanced to set up something like that. the BBW that I already have has no HDMI but has also low specifications ( comparable with RasPi that I also have 720MHz Cortex , 256 MB ) than BBB . I am prepared to use it headless with X11 server on other machine . That why I proposed Raspi for an X11 server. I like Axis toolpath preview and I don't want to loose it ;). On BBB I heard That is a bridge cape that is solving the pin problems. Paul: Which are you---a machinist who wants to make chips fly or a computer enthusiast who wants to play with new hardware/software combos? Please don't think I'm being snarky. A machinist who wants a solution which just works would either stick with the oversize AT/ATX computer you already have or substitute a downsized, presumably Intel Atom-equipped microATX board with an onboard parallel port. The LinuxCNC wiki contains latency test data for some of these boards. The archive of this list contains messages about the headaches caused by the onboard graphics controllers of certain of these boards. If you're willing to use a RPi as the Xserver for a BBW then you should have no problem using it as well for any x86-based controller if the onboard graphics don't work out. I'm actually a great fan of separate Xserver terminals---what we used to call an Xterm, aka thin client, last century. The neat thing is, you can try this approach right now to see if you like it, using your existing LinuxCNC as the Xclient. A computer enthusiast, on the other hand, may well wish to wade into the ARM world. There is furious activity on several levels in the LinuxCNC community which tends to be reported in more detail on the companion emc-developers mail list. I'm at the periphery of the developers, helping more to test their work than to contribute to it. Impressive gains have been made and there are some striking results (see for example Charles Steinkuehler's YouTube videos of his 3d printing) but I'd have to characterize the whole of the work as not yet ready for prime time but real soon now from the standpoint of the common user. Not only customized LinuxCNC software but also customized capes/interface boards are emerging should you choose to play. If I had to compare the total cost of ownership (TCO) of the two approaches as opposed to the first cost of the motherboard, I'd have to say they are roughly equal, especially if one puts a dollar/euro/leu value on one's time. [Please, gentle readers, don't start an email storm over this observation. If you like, I'll restate it as all hardware approaches cost more than you expected.] Excellent point of view Kent. I am more a computer enthusiast than a machinist. In any moment I can use my existing old faithful computer for machining ( mainly PCB and front panels) . But I will try also the BBW that I already have . I will also check the Xserver /client solution with the existing setup ( computer) in different server implementations ( Raspi vs. computer) . Also your proposal of Atom board is very interesting. I'll have to find a Atom MB with parallel port for tests. Finaly i think that the old computer should vanish for this hobby CNC and has to be replaced by a smart embedded solution with a large enough touchscreen , a jog wheel and for sure LinuxCNC is the solution in front of windows approaches. Thank you very much . -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
Hi, If you haven't already, you should check out the blog at http://bb-lcnc.blogspot.com for images and status on running LinuxCNC on Beaglebones. I know that Charles, who writes the blog, and I are both running BBBs with HDMI enabled. The hdmi issues with the Black have to do with the fact that the capes were designed for the BBW, and pins were used that are needed for hdmi on the Black. Fortunately, the BBB and LinuxCNC makes it easy to move functions to other pins. The most recent MachineKit image available at the link above has a configuration which avoids the conflicting pins on the Black. Charles uses the bridge adapter for his printer. I'm just using a rats nest of wires to connect my BBB to some hardware I already had, in this case a RAMPS board. Troy On Wed, Aug 7, 2013 at 7:26 AM, Paul Lacatus p...@paul-lacatus.ro wrote: On 07.08.2013 15:03, Viesturs Lācis wrote: 2013/8/7 Paul Lacatus p...@paul-lacatus.ro Your idea is interesting but an Atom board is at a fraction of BB cost that is about 50 Euro ? And what about parallel ports on atom boards ? I will check. Thank you ! PS The BBW is just laying on my table ;) BTW Beaglebone is much easier to mount somewhere in the electronics cabinet The only thing that keeps me from using Beaglebone are the emails about hdmi and pru fight for particular pins, so there were some difficulties about them. I know that Charles has a working solution, but I do not know any details. Disabling hdmi and running the beaglebone headless is definitely a solution, but I know that I am not that advanced to set up something like that. the BBW that I already have has no HDMI but has also low specifications ( comparable with RasPi that I also have 720MHz Cortex , 256 MB ) than BBB . I am prepared to use it headless with X11 server on other machine . That why I proposed Raspi for an X11 server. I like Axis toolpath preview and I don't want to loose it ;). On BBB I heard That is a bridge cape that is solving the pin problems. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Planning phase for new machine, need decision support
On 8/7/2013 3:24 AM, Sven Wesley wrote: 2013/8/6 Davee...@dc9.tzo.com ... Here is some free motor sizing software that seems to be quite accurate. A number of Servo drive companies use this software and they brand label it.. http://visualsizer.com/ It is entirely free. I have used the Visual Sizer XP for years and it is really good but takes some effort to figure out how to run it even though it is very graphical. ... Dave i did try it out but there's something that I miss. I tried a 10 m/min calculation with a 5 mm pitch screw and it ended up with a needed RPM from motor at 60.69 RPM... /S The software does take a little while to figure out. If you get stuck, post the configuration somewhere and I will download it and take a look at it. The workflow on how to make that application do what you want is not entirely obvious. Dave -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
Hi, On 2013-08-07 13:44, Paul Lacatus wrote: On 07.08.2013 12:35, andy pugh wrote: On 7 August 2013 08:30, Paul Lacatus p...@paul-lacatus.ro wrote: The problem with RPI is that the real time kernel modules are not implemented and the access to GPIO in not fast enough for Linux CNC . This infos I got from the net maybe I am wrong. Paul I've ported the pluto-p-servo driver for RPI per SPI but I'm still working on it (programming the fpga per gpio from the RPI). Also the pluto-step driver has to be done. The first test looks good with remote-X. be tuned... ;) matsche -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- In der Wissenschaft siegt nie eine neue Theorie, nur ihre Gegner sterben nach und nach Max Planck -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
Date: Wed, 07 Aug 2013 14:44:20 +0300 From: Paul Lacatus p...@paul-lacatus.ro Subject: Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70 To: emc-users@lists.sourceforge.net Message-ID: 52023314.5070...@paul-lacatus.ro Content-Type: text/plain; charset=ISO-8859-1; format=flowed On 07.08.2013 12:35, andy pugh wrote: On 7 August 2013 08:30, Paul Lacatus p...@paul-lacatus.ro wrote: 2. I need a display and keyboard near the Proxxon for setting and control . If I am using BBW can I use a Raspberry Pi for X11 server ? In that case running Axis can be overkill for BBW ( grafic acceleration is in Raspi ) ? I don't think it is strictly necessary to run the BBW or BBB headless. It is just about possible to run the Axis GUI and move hardware with the Raspberry Pi. (Not that I can recommend that, the RPi step generator doesn't actually appear to work properly). Or is there a strong reason that BBB installations have to run headless? As far as I understood from what I found on the net the BBB grafic is not quite performant it is only a interface from the LCD interface existing also on the BBW to HDMI. In that case the load on the processor for displaying AXIS is important. That why my idea was to move this burden od x11 server to another machine that is better prepared for this job. The problem with RPI is that the real time kernel modules are not implemented and the access to GPIO in not fast enough for Linux CNC . This infos I got from the net maybe I am wrong. Paul My MF70 is controlled by RPi running LCNC. See here: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=37t=33809 Cheers! -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 8/7/2013 8:01 AM, Paul Lacatus wrote: On 07.08.2013 15:35, andy pugh wrote: Your proposed combination ought to work well My problem is that I need more info about LinuxCNC on BB(W/B) that I hope to find here on the mailing list . This other questions still remains: 1. Is this card ( BBW 720MHz 256 MB ) strong enough for running LinuxCNC headless ? Or should I get a BeagleBone Black (1GHz / 512 MB ? The BBW works fine running LinuxCNC headless. I was 3D printing with LinuxCNC and the BBW before the 'Black version came out: http://www.youtube.com/watch?v=n2IoHOZipLU ...I'm even tunneling the X11 session via ssh, which puts a heavier burden on the BeagleBone than necessary. I suggest starting with my MachineKit image, which is basically Robert C. Nelson's Debian image for the BeagleBone with a Xenomai real-time kernel installed, the LinuxCNC build dependencies added, and the appropriate version of LinuxCNC already setup and compiled in a local git working directory: http://bb-lcnc.blogspot.com/p/machinekit_16.html I haven't tried running the BBW on the 3.8 series kernel recently, but AFAIK it should work fine. Let me know if you have any problems. 3. If I have already the stepper driver board controlled by LPT port of the computer did I need and extra hardware of interfacing BeagleBone or a simple logic level conversion is enough. You should be fine as long as you don't send any 5V signals to the BeagleBone. Virtually all modern PC parallel ports have 3.3V signals, just like the BeagleBone, but the 'Bone doesn't have 5V tolerant inputs. Since you are wanting to run headless, you can use any of the available BeagleBone configurations, but I would recommend using one that does not conflict with the LCD/HDMI pins. That way you can add a monitor or LCD later if you choose, or use the HDMI interface if you get a 'Black. -- Charles Steinkuehler char...@steinkuehler.net signature.asc Description: OpenPGP digital signature -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Planning phase for new machine, need decision support
On Wed, Aug 7, 2013 at 12:16 AM, Don Stanley dstanley1...@gmail.com wrote: Most stepper controllers have idle torque. Some will have full torque at idle (stopped). Most modern stepper controllers will have a selectable idle torque and some will wait a few seconds before switching from run torque to idle torque. You missed Stephen's point---yes, there's a holding current going through the stepper coils, but in the middle of the step the torque is zero. In other words, the stepper motor holds the position by having local maxima of holding torque at half step ahead and after the desired position. There's no closed loop like in a servo, where you can increase the precision by increasing the resolver resolution and/or the gain. Don't get me wrong---I actually like steppers, because they are simple and reliable, and accurate enough if engineered properly by matching their inherent accuracy to the desired movement precision. It's just that we have to understand their limitations. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Planning phase for new machine, need decision support
On 8/7/2013 12:23 PM, Przemek Klosowski wrote: On Wed, Aug 7, 2013 at 12:16 AM, Don Stanleydstanley1...@gmail.com wrote: Most stepper controllers have idle torque. Some will have full torque at idle (stopped). Most modern stepper controllers will have a selectable idle torque and some will wait a few seconds before switching from run torque to idle torque. You missed Stephen's point---yes, there's a holding current going through the stepper coils, but in the middle of the step the torque is zero. In other words, the stepper motor holds the position by having local maxima of holding torque at half step ahead and after the desired position. There's no closed loop like in a servo, where you can increase the precision by increasing the resolver resolution and/or the gain. Don't get me wrong---I actually like steppers, because they are simple and reliable, and accurate enough if engineered properly by matching their inherent accuracy to the desired movement precision. It's just that we have to understand their limitations. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Theoretically that may be true, but you can't feel slop in the middle of the step at all on these new stepper motors. They feel tight when they are being held in position.. If you grab a knob on the shaft when they are energized stationary there appears to be no slop. If you want to use steppers you need to make one step of the motor equal to a machine movement of less than the desired precision of the machine.. That dictates your motor gearing ratio to the load. Unfortunately that also dictates the max speed of the machine since steppers run out of usable torque at relatively low speeds compared to servos. But for many applications that is not a problem. I have an old Bridgeport mill with steppers and I think it was geared such that one step of the motors was equal to .001 of an inch which apparently was good enough for thousands of machines shops. On the other hand the mill I have is no speed demon during rapids with the old heavy finned motors..50-60 ipm is quite reliable. which at this point is fast enough. Dave -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 7 Aug 2013, at 16:21, GP Orcullo kinsama...@ymail.com wrote: My MF70 is controlled by RPi running LCNC. Is that using the Mungkie image? I was not getting a continuous step stream with that. (Sorry to derail the thread, but I have an RPi to parport breakout board designed (and 20 boards, some populated). I gave some away at the Developer fest, but have plenty left and can get more (I thing they cost $1 each to have made)) -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill Proxxon MF70
What level of graphics resolution do you get on the screen with that Cedarville Chipset? Dave On 8/7/2013 5:11 PM, Marius Liebenberg wrote: I use the D2500HN a lot. It has a on board LPT and one PCI slot. I also made a small housing for it that fits inside the lid of my control box. On 2013/08/07 10:00 PM, Viesturs La-cis wrote: 2013/8/7 Marius Liebenbergmar...@mastercut.co.za Viesturs, I only use the Atom mini ITX boards for all my machines I do. I also use a Nova board fitted with a 525 chip as well as the more recent Intel 2700. I have had absolutely no problems with any of them. No driver problems at all. You simply put the CD in and wait for it to finish. After that everything works, even the touch screen. Thanks! I did a little search in list archive as I knew that this topic has been decided. The conclusion of my search - I have no idea, where did I get scared of new Atom based itx boards. I have built at least 5 machines with D525 board and would like to use it again, if it will be available. You convinced me to consider trying something newer than D525 board. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Looking for error in doing dbl-sided pcb's.
Hi all; I have a very small error, perhaps .010 in the top vs bottom hole pattern placements. Unless someone can convince me that pcb2gcode has a built in error in its Y calc's for the bottom of the board, the error is mine, darnit. Background: The eagle .brd file I was sent is arranged such that the board is bigger in Y then in X. However, in building a pallet to hold the board I much prefer to have the board pattern laying long ways with the X axis. So, I wrote, and it has worked fairly well, for several projects based on the first pallet I made for the lathes spindle encoder a holefinder routine to establish a known location on the pallet, just off the upper left corner of the board, a short piece of 1/8 brass tubing, superglued in place and connected the the LCNC probe input pin. Then I made, from a sewing needle threader, a probe I can put in a 1/8 collet, with the wire shaped like a sharp speer. I have a .1 uf cap on the probe circuit which captures and holds any momentary contact the probe wire makes to the inside of the mouth of the tubing, holding it long enough for LCNC to grab it. The facilitate LCNC seeing the probe wire as a perfect cone, the spindle is running about 1800 rpm while this probing is going on. Basically it lowers the spinning wire into the hole until first contact is detected, then raises the spindle 20 thou for clearance, then moves first the x, capturing #5061 into 2 vars as it moves to detect the tubing, first left, then right. It adds those two, and divides by 2, then runs x to the mathematical center. Then it does the same with the Y axis, captureing #5062 into fronty and backy vars, does the same /2 and runs the mills Y to that center. Once its done that, it applies the detected offsets to the G55 and G56 maps, which are then used by the rest of the code depending on whether its for the top (G55) or bottom (G56) of the board. The bottom however has an offset added such that running the bot.drill file should result in holes drilled halfway through the board that meet in the middle. But, both G55 and G56 are also rotated with an R270 at the end of the G10 L2 P# statement in this code. What I am getting when I drill 5 thou into the board running the two drill files from pcb2gcode shows a dead on registration has been achieved with the offset as applied to only the G56 map. The board is being flipped along the x axis, so the same end of the board is always wedged via the hold-down screws against the left side of the milled pocket, so I can't see that as a source of error here. But, I have an offset of perhaps .012 in the drilled Y positions after the 270 rotation rotation to convert it to my mills real X axis. Could this be an artifact of a small error in the fudgex and fudgey vars at the top of the file that you can see on my web page in the Genes-os9-stf/LCNC link? These are the actual locations of this brass tube, with reference to the assumption that as I see it on the mills table, of the exact 0.0, 0.0 upper left corner of the pallet's board pocket. Supposedly. On the previous pallet, I established a 0,0 location then moved .2 left and .1 below and drilled the hole for the brass contact pipe, this time I got ahead of myself and milled the pocket, then installed the pipe, unforch after the 0,0 had been lost due to re-homing the machine the next day. Because there is nothing to reference at that location since its an inside corner, and I ran the mill making that pocket, out at the correct angle to serve as clearance for the sharp corner of the board, its not something I can measure and easily verify. I am ATM, fresh out of ideas, and somewhat confused in trying to trace the error because I am using the G55 and G56 mapping to rotate the pattern as it is seen on the mills table. So if some kind soul could look at this tholefinder.ngc file at the above link suggest how to proceed in removing this error, I'd be most appreciative. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! My views http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml I put up my thumb... and it blotted out the planet Earth. -- Neil Armstrong A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list
Re: [Emc-users] Linuxcnc on Beaglebone for a small mill, Proxxon MF70
On 8/7/2013 12:58 PM, dave wrote: On Wed, 2013-08-07 at 11:26 -0700, David Bagby wrote: big snip Dave: Thanks for the nice synopsis. With all the neat stuff going on is is difficult to keep up. IIRC Kent posted some info on running with a X server on another machine and something to the effect that TkLinuxcnc took much less memory on the client side vs axis. Just to clarify you are running software generated steps to drive the Proxxon? Just to avoid confusion, I'm personally using LCNC to drive a Shapeoko rather than the Proxxon that the original poster asked about. - but that difference is not really relevant to the question you asked. The beaglebone boards (BBw or BBB) use a system on chip (SoC) from Texas instruments (the AM335x series). Those SoCs have multiple processors inside and two of them are called PRUs (Programmable Realtime Units). The PRUs are internal CPU subsystems that can be dedicated to doing real time tasks. Charles has created some code for them that lets LCNC use them to do the step pulse generation. So from one viewpoint this could be thought of as firmware generated steps, but from the LCNC viewpoint, it is a BB hardware step generation module that LCNC is using. The usual software step generation for LCNC is run on the x86 CPU and thus is subject to all the things that happen on the x86 CPU. Running that type of software step generation is one reason LCNC use the RTAI kernel on x86 machines. With the BBB, the internal PRUs are really hardware black boxes to LCNC, and the LCNC software step generation is neither used or needed. Not really being picky but you might post a link to the K9 board. Any pricing yet? Uh... the K9s have no pricing as they were not developed to be a product; We never intended the K9 project to be a product effort, rather they were created as a development platform to use for further BBB/LCNC software development. When you decide to ignore economics that way you get to throw lots of experimental stuff onto the K9 board to try out and play with - but some of the things on there don't make sense for a BBB cape product (ex: there is a sample interfaces for 1 encoder to use for sftw development while any real system probably needs more than 1). AS is the total of all the K9 bits and pieces would make for a silly expensive product. Those interested in more info as to what a K9 is can follow these links: www.CalypsoVentures.com/privatedl/K9/K9_SmorgasBoard_Overview.pdf http://www.pmdx.com/k9/K9-first-photo.JPG We hope that out of the K9 effort, there will emerge (eventually) K9 derivatives that could become future products and/or components of systems. Those interested in such things could contact myself or Steve at PMDX off list as I tend to stay away from speculative discussion of other people's plans in a public forum. Keep up the good work. Dave Dave -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A puzzler
On 08/07/2013 04:14 AM, andy pugh wrote: On 7 August 2013 01:14, TJoseph Powderly tjt...@gmail.com wrote: cosine err? I don't think so. The main reason not to think so is that he has measured the error as non-linear (I am awaiting the actual numbers) A cosine error of .158mm in 50 would mean an inclination of 4.5 degrees which seems like it would be obvious. non-linear?, ok i read it repeated to same value from origin, but was consistantly off at some extreme. np. discount bad mounting tomp -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A puzzler
On 08/06/2013 10:44 PM, Gregg Eshelman wrote: On Tue, 8/6/13, TJoseph Powderly tjt...@gmail.com wrote: cosine err? the motion of the axis must be colinear with the motion of the scale theres a few pages supplied wiht all Heidenhain scales describing the mounting techniques and qualifications. i could assume this has been verified, but it would explain motion that returns to same point yet has constant distance err regards tomp If the scale's not mounted perfectly parallel to the motion axis but is close enough so it doesn't bind as it slides, that would produce an error that's linear and always repeats exactly. But would it produce that much of an error? -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users whatever angle whose cosine produces 158um over the traveled distance. that'd be ~.006 and i didnt see the distance traveled stated. it wouldnt be much of an angle at a great distance. but i hear its NOT linear so... forgettaboudit its not cosine error (btw theres and external surface on the alum enclosure meant for tramming it collinear. ) tomp tjtr33 -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A puzzler
On 7 Aug 2013, at 23:49, TJoseph Powderly tjt...@gmail.com wrote non-linear?, ok i read it repeated to same value from origin, but was consistantly off at some extreme. np. discount bad mounting It seems that the sine/cosine signals from the scales do not actually repeat every 10um. This is the guy's YouTube video. http://www.youtube.com/watch?v=iIdidzAPgBssns=em What he is comparing is the sine/cosine phase as measured by the interpolation software, the position as measured by a 0.1um probe and the distance measured by linuxcnc. The phase should be zero every 10um. It does not appear to be. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Raspberry Pi was Re: Linuxcnc on Beaglebone for a small mill Proxxon MF70
On 7 Aug 2013, at 18:56, Andy Pugh bodge...@gmail.com wrote: My MF70 is controlled by RPi running LCNC. Is that using the Mungkie image? I was not getting a continuous step stream with that. (Sorry to derail the thread, but I have an RPi to parport breakout board designed (and 20 boards, some populated). I gave some away at the Developer fest, but have plenty left and can get more (I thing they cost $1 each to have made)) Nope, I'm using an external hardware for step generation. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A puzzler
On 08/07/2013 06:34 PM, Andy Pugh wrote: On 7 Aug 2013, at 23:49, TJoseph Powderly tjt...@gmail.com wrote non-linear?, ok i read it repeated to same value from origin, but was consistantly off at some extreme. np. discount bad mounting It seems that the sine/cosine signals from the scales do not actually repeat every 10um. This is the guy's YouTube video. http://www.youtube.com/watch?v=iIdidzAPgBssns=em What he is comparing is the sine/cosine phase as measured by the interpolation software, the position as measured by a 0.1um probe and the distance measured by linuxcnc. The phase should be zero every 10um. It does not appear to be. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users i think the reported values from the IC Haus chip can be looked at with his setup. but the actual sinuses from the Heidenhain scale are _not_ observed by his setup. some interpreted ( interpolated) values are returned from the setup in the video. from the video, i would not infer an error in the sinus, but thats just IMO i would verify the sinus periodicty and i'd ask Heidenhain to check the scale. Can this user hand the encoder over to some local Heidenhain service center? Heidenhain has the ability to prove their certificate's claim They have these tools and are very interested in making sure their products live up to their reputation. the test rig would be something like this... An oscilloscope can show if the sinus is of an even period. A device can move the reader head colinear with the scale. The displacement at a contant velocity should result in a pair of sinuses that are clean and repeatable ( for time, distance and amplitude ) so, please eliminate any suspicion of the scale itself, then, if the scale sinus periodicity is correct, move onto the subsequent electronics (the interface and the IC Haus interpolator ) regards TomP tjtr33 -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
