The drivers have been working on mach3 for the last 5years with no problem,and also work no problem with linuxcnc on a pc. I believe jeff pollard has scoped the output on the dir line and it is clearly visible.
On 20/02/14 16:43, Josiah Morgan wrote: > Mark, > when this happens, have you tried unplugging the step and dir(everything > but enable) from the beaglebone to verify that it isn't just coming from > microstepping on the driver itself? > I know I've experienced similar crackling sounds on some stepper drivers > that was completely isolated from input from step/dir source. > > > On Thu, Feb 20, 2014 at 10:21 AM, Mark Tucker <m...@rmtucker.f2s.com> wrote: > >> Ok i am not well enough conversed to explain this in detail,but i will try. >> Having recently been involved with the beaglebone/machinekit setup,i >> accidently came across a problem. >> I found that speradically the motors would make a noise like "frying an >> egg" after movement had finished. >> This after some investigation by Charles,Jeff pollard,and few others,was >> found to be the dir line hunting after a movement. >> This has turned out to be a known problem with the pru and the fact it is >> using position feedback and not velocity feedback. >> So the outcome after a few discussions was that the hal file needs >> changing to utilise the stepgen in velocity mode. >> Now i am at a complete loss how to do this,so is there anyone out there >> that can help? >> Charles is snowed under at the moment otherwise i am sure he would oblige. >> I will try attatching my hal file. >> I am sure there are others that will explain this better than me because >> of my limited knowledge. >> >> >> >> ------------------------------------------------------------------------------ >> Managing the Performance of Cloud-Based Applications >> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. >> Read the Whitepaper. >> >> http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> > ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
