Re: [Emc-users] Max Jitter
2012/3/29 Jeshua Lacock jes...@3dtopo.com: Hi, I am not sure to use the 1.0ms or 25us figure. Can anyone shed some light on which jitter number I would use for the latency test? Based on the wording You used: which jitter number I would use for the latency test, I am not sure that I understand, what exactly You mean. 1) If You mean: which jitter number from latency test results to take into account? 25us figure represents jitter in base thread. 1ms figure represents jitter in servo thread. Which figure to use? It depends... Will You run anything in base thread (like Erik mentioned - software step generation is one of the tasks for base thread) or will everything be done in servo thread? 2) If You mean: which number to take for the latency number to run? IMHO, the question is not valid, You cannot put Your own numbers there, You simply should open latency test and press run (or something like that, I do not remember correctly) and then, with that test window in background, press f2 and type glxgears - a small window with 2 rotating gears should open. Its purpose is to create a load for CPU. You could also open firefox and do whatever You can to load the PC. It is recommended to run latency period longer than a minute or two, so that the max jitter that will be catched would really represent the worst-case situation. Viesturs -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Storebro 260 Second encounter...
Hello All! Some progress made as mentioned earlier. System uprunning, soon probably doing some real work. Next step beyond that is to get my Mac talk and listen to it. Done preparations for that. System parameters to save and programs to load. What have been done so far is mentioned at this place; http:// abcnc.se/projects/storebro260.html Thanks for your valuable comments. They are thoughtfully considered! Greetings / Roger abCNC --- Roger Holmquist Bockarp villa Tallebo 59592 Mjölby +46-706-250123 +46-768-788477 +46-142-20542 ro...@abcnc.se http://abcnc.se -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] LAMP stack for robotics
Just an FYI, This article was recently posted via slashdot: http://www.xconomy.com/san-francisco/2012/03/29/can-willow-garages-linux-for -robots-spur-internet-scale-growth/?single_page=true quote That's one of the main arguments you'll hear from the engineers at Willow Garage, a unique startup in Menlo Park, CA, that's developing hardware and software for a new generation of personal robots. You can't name a single Internet company, they say, that would have succeeded if it had been forced to recreate all the basic tools underlying the Web, from the Linux operating system to the Apache HTTP server to the MySQL database system to the Python, Perl, and PHP programming languages-the ingredients of the so-called LAMP stack. Yet most robot companies still try to reinvent the wheel every time, building robots that require putting together a tangled mess of proprietary, one-off software systems. /quote Slashdot link: http://developers.slashdot.org/story/12/03/29/1325256/needed-a-lamp-stack-fo r-robotics?utm_source=rss1.0moreanonutm_medium=feed Linuxcnc was already mentioned in one of the early comments. Also interesting and perhaps applicable is the discussion about STEP-NC on the developers mailing list. Regards, Eric -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Max Jitter
On Mar 29, 2012, at 12:59 AM, Viesturs Lācis wrote: 1) If You mean: which jitter number from latency test results to take into account? 25us figure represents jitter in base thread. 1ms figure represents jitter in servo thread. Which figure to use? It depends... Will You run anything in base thread (like Erik mentioned - software step generation is one of the tasks for base thread) or will everything be done in servo thread? I am using servos with the Gecko 320. 2) If You mean: which number to take for the latency number to run? IMHO, the question is not valid, You cannot put Your own numbers there, You simply should open latency test and press run (or something like that, I do not remember correctly) and then, with that I am familiar with the latency test, that is exactly what I was referring to. It reports two Max Jitters there and I did not know for certain that one was for servos and the other for steppers. Thank you. Does anyone know of some known settings to try disabling in CMOS to possibly get lower numbers? My 1.0ms Max Jitter is under 9300, but if possible I would like to get it even lower. Thanks! Best, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
