On Friday, March 30, 2012 10:12:25 AM Jan de Kruyf did opine: > Yes you are right on the dot there. > > j. > > On Fri, Mar 30, 2012 at 1:23 PM, Viesturs Lؤپcis <viesturs.la...@gmail.com>wrote: > > 2012/3/30 Jan de Kruyf <jan.de.kr...@gmail.com>: > > > It is the combination that matters Viesturs. > > > > Well, I think that there are many factors that matter. > > My goal was to explain Jeshua and probably other new users that for > > stepper machines (meaning all the machines, which control motor drives > > with step/dir signals and do not receive any position feedback - > > mostly steppers, but it includes also Gecko G320 drives and other, > > respectively, it is stepper machine from controller point of view) it > > is much better (in terms of overall benefit and also total cost) to go > > for a cheap mb + cpu and use external fpga card for hardware step > > generation rather than get expensive and powerful pc and generate > > steps in software. > > Cheaper mb and cpu (many users, including me, are very happy with > > Intel D510/D525 line of motherboards, that already comes with > > preinstalled dual-core cpu and costs less than 100 $) will have little > > higher jitter, but it does not really much matter, because it would > > not run base thread (most affected by jitter) at all. Several us back > > or forth do not affect 1ms servo thread. > > And I am not mentioning all the fpga card benefits, like increased > > number of i/o pins etc. > > > > Viesturs
While I find the D525MW to be a more capable machine than anything else I have run my stuff with. The one I am setting up to run the lathe with has, without using stepconfig because stepconfig says it has a broken pipe when it tries to move the motor, while I can fire up linuxcnc (using axis) has already moved the motors above 40 IPM while they are laying on the bench. Its as if intel set out to build the ideal board just for us. But I am encountering following errors after the motor has reached speed and moved a good distance at that speed, but don't know what to adjust that affects that. Hints anyone? 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> To err is human, but when the eraser wears out before the pencil, you're overdoing it a little. ------------------------------------------------------------------------------ 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
