John I don't suppose you are using Gecko's? As Jeff mentioned earlier it seems like a Gecko driver does not like the Dir line wiggled about in that fashion. Why it should make a noise beats me,but i can assure everyone that the drives are running without these noises on a pc setup and have been for many years. Also if the machine comes to a halt and the motor hunts because it is not in the exact position ie 1/2 step out,The step line would also be stepping to adjust the position. Or am i not grasping this?
On 22/02/14 17:11, John Prentice (FS) wrote: > Jumping in - I have had this with the MachineKit. No noise but as I had the > 'scope on the signals I spotted the fidgeting Dir. I had no pulses on Step > line, just Dir hunting. I was worried that it might stop the stepper drivers > going to reduced current mode but with the ones I was using this was OK. > > Best wishes > > John Prentice > > -----Original Message----- > From: Stephen Dubovsky [mailto:smdubov...@gmail.com] > Sent: 22 February 2014 16:33 > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Crackling motors using Beaglebone > > Are steps also being generated (back and forth) or is just the direction > line toggling (w/ no steps)? > > > On Sat, Feb 22, 2014 at 10:56 AM, Mark Tucker <m...@rmtucker.f2s.com> wrote: > >> I seem to remember there being a fix for this around v2.3 or something >> to stop the stepper motors hunting.which i assume must have been a >> parameter to set the tolerance for acceptable position. >> Does this not apply when using hardware generated pulses? >> I will have to leave the beaglebone on the bench until charles has >> time to sort this one out. >> I don't think it is doing any damage but it really does sound awful. >> > > ------------------------------------------------------------------------------ > 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
