Jon Anderson wrote:
Wow! this really DOES sound like a software problem. I really don't
believe this is the motor losing steps due to drag, electrical noise, etc.
It may be due to some characteristic of the control software, under just
the right sequence of G-code comands, produces step pulses too fast
for the motor to follow. But, that bit about fixing the axis offsets blind,
and being dead on after repeating the sequence 50 times, is just to
consistant to be anything other than software (one way or another).
Jon (increasingly happier that I went with servos)
Use shielded cable, use a heavy gauge, keep the wires routed away from
noise sources, all that stuff you learned in shop or school. I think the
ARRL manuals still have good sections one how to wire for high current,
high frequency stuff. Dig up an old copy if the new one doesn't.
Jim
