Tim,
Did you every manage to pin down where the interference was coming from
or what made the most difference?
are all cables now shielded?
What was the "more shielding" that smoothed out the motor and did you find
the victim to be the parallel port cabling?
Mo
I don't know if your problem is the same, but I had the same thing happen
to
me as I increased the amps I started getting problems with lost steps on
curves. It was particularly bad with about a 1/2" radius and moving around
7
ipm. The step loss was quite consistent on the parts with curves, but I
could do slow or rapid moves along an axis all day long and the moves were
perfect with no steps lost. It ended up being a shielding problem. I
thought
the interference was coming from the mosfets & heatsinks, but Jon made a
post and thinks it is from the circuit board (with his knowledge and
understanding I don't have much reason to disagree). Dan Falck posted
about
having a similar problem as he upped the juice on his system also.
The fact that your loss of steps increased as you upped the amps makes me
think you are experiencing the same type of thing. When I was lossing
steps
I also would notice that the motor was running very ragged. More shielding
caused my step loss to go away and the motor started sounding much
smoother
running.
