On Monday, October 31, 2011 03:49:31 AM Leonardo Marsaglia did opine: > Didn't know that! Since the machine works well we've never cared too > much, also the machine is only used for positioning movements, and it's > not working with interpolation of axes. > > Anyway, when I can I'll be replacing the motherboard for one of the > recomended on the wiki or the mailing list, since this one also has > onboard video, and may be that's causing trouble too.
That onboard video is a virtual guarantee of bad latency. The memory sharing activity is often done by totally disabling the IRQ's while it is being done. Disable it and put a pci/agp video card in it and those causes of latency are nicely swatted. For a long time I had to use the vesa driver because the proprietary stuff was also guilty of that, but when my old TNT card died, I put an ati X1650 in it and the vesa driver was so restricted in capability I finally tried the ati as driver choice in my /etc/X11/xorg.conf. The ati driver is a meta driver, looking at the card and calling the correct open source driver for the card, which in this case was the radeon driver. It is working great, square pixels even on a wide screen lcd monitor, and the latencies are plumb tolerable, getting a warning about 1/4 of the time at startup, and with no apparent effect on the steppers, they sing a quite pure tone when in motion. Listen to them, if they have a raspy throat sound, you probably have latency problems enough to effect them and that will limit your reliable rapids speed just as quickly as resonance will. > Thanks as always for your kindness! > > Leonardo. > > 2011/10/30 Jon Elson <[email protected]> > > > On 10/30/2011 5:53 PM, Leonardo Marsaglia wrote: > > > I have the same behaviour on a machine running steppers even with a > > > mesa 5i20 for the step generation. The problem anyway shows > > > everytime I start EMC, then it doesn't appear all day long until > > > the machine is turned > > > > off. > > > > > > EMC only reports the latency error the first time, then it suppresses > > the errors from > > then on. So, you are running blind! > > > > Jon > > > > > > ---------------------------------------------------------------------- > > -------- Get your Android app more play: Bring it to the BlackBerry > > PlayBook in minutes. BlackBerry App World™ now supports > > Android™ Apps for the BlackBerry® PlayBook™. Discover > > just how easy and simple it is! http://p.sf.net/sfu/android-dev2dev > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------ > ------ Get your Android app more play: Bring it to the BlackBerry > PlayBook in minutes. BlackBerry App World™ now supports > Android™ Apps for the BlackBerry® PlayBook™. Discover > just how easy and simple it is! http://p.sf.net/sfu/android-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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> A fool and his honey are soon parted. ------------------------------------------------------------------------------ Get your Android app more play: Bring it to the BlackBerry PlayBook in minutes. BlackBerry App World™ now supports Android™ Apps for the BlackBerry® PlayBook™. Discover just how easy and simple it is! http://p.sf.net/sfu/android-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
