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 <[email protected]> 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- Josiah Morgan, P.E. ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
