Mark Not Geckos here but a Leadshine 3 phase stepper motor driver.
I think John K has covered more bases than I ever could. In essence I see it as the accumulator counting up and down but not "overflowing" so a step never gets emitted but the sign of the "error" is changing so Dir follows this. Best wishes John Prentice -----Original Message----- From: Mark Tucker [mailto:[email protected]] Sent: 22 February 2014 18:08 To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Crackling motors using Beaglebone 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? ------------------------------------------------------------------------------ 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
