> > *For a stepping motor driver with 10uStep per step that's still pretty > well faster than it can actually turn. *
No, you missed the point. With 10 uS per cycle, the motor can step in steps that are a multiple of 10uS long. So it can be 6000 uS or 6010 uS but never 6011 uS per step. It is the step-size resolution. The pulse can be raised or lowered on each cycle. I think the max step rates would then be 20 uS or 50KHz which is faster than it can go. BTW this only works because you have a very fast processor. If I'm running a stepper motor using my $1 (yes literally $1) microcontroller chip I can tell the hardware step generator the step period in units of 0.001 uS. one nanosecond I get 10,000 times better resolution. I think the FPGA based solutions do the same. That said, I doubt the nanosecond level resolution of the step period is really needed. -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
