On 10/31/2014 03:36 PM, Gene Heskett wrote: ...snip > That could be an SOA failure, where a bug spends too much time in the > transition between on and off and punches thru. > > TBT, most darlingtons are too slow, particularly for power drivers, to be > suitable for such usage, and I would expect a relatively high failure > rate. > > Servo, or steppers? > > Cheers, Gene Heskett >
NEMA42 steppers at 45V and 8 amps. The PWM sounds like it is in the audio range or pretty close. These drives have worked pretty well for the handful of years that I have had the machine, plus it is around thirty years old. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
