RE: [CAD_CAM_EDM_DRO] stepper issues

At 11:58 AM 11/17/2007, you wrote:

>It actually looks like I should speed this motor up, rather than slow down.

Steppers are load sensitive. The more mass you move the slower they
accelerate, the more "spring" in the mass, the worse things get. If
the motor inertia is too small, the spring may prevent the motor from
getting to the next step. As an experiment, put a mass on the motor
and see what happens. The stop-start rate will be lower, the
acceleration ramp rate will be lower, but the reliability may be
better. If you can run asynchronous stop/start at a given rate, you
are probably safe.


David G. LeVine
Nashua, NH 03060