Re: EMC and stepper driver

Tim:

Let me ask you this question then. When talking about EMC and
driving steppers. Do people know for sure that the problem is
unevenly spaced steps at the higher speeds, or are steps actually
missing.

And one more bonus question on EMC. I have seen talk about encoder
feedback for steppers. Were i assume the encoders mount on the
stepper. Is there a setup in EMC that allows use of the DRO freeware
boards and using linear scales for absolute position. Assuming
linear scales can be hooked up to these boards.

Wally K.

--- In CAD_CAM_EDM_DRO@egroups.com, Tim Goldstein <timg@k...> wrote:
> I am afraid I don't know. There are some hardware and software
issues that
> other people are far more versed on than I and I think that
processor speed
> plays a role. Ultimately I found that with an AMD K6 and using
steppermod I
> have my G320 servo setup capable of going faster than I am
comfortable with
> and stopped trying to go faster at that point.
>
> Tim
> [Denver, CO]
>
> > Tim:
> >
> > Thank you for the insitefull reply. You did a very good job of
> > explaining why the servo has less problems with a pulse train
then a
> > stepper.
> >
> > I have one other question for you. You talked about 30,000 steps
per
> > second from emc to your servo system. Do you know what the upper
> > limit is for steps per second that EMC will output.
> >
> > Wally K.