Re: Testing Step Motors

Ray Henry wrote:

> From: Ray Henry <rehenry@...>
>
> Read an interesting article in Test and Measurement World Nov 1999 that
> discussed stepper motor applications, testing, and failure. Stuff there
> that I didn't know about holding and dynamic torque and accuracy.

Yes, very interesting. Nobody ever seems to talk about the positioning
accuracy of stepper motors. They just assume that they precisely break
a circle into however many steps they have per rev, which is far from true.
And, especially with microstepping, people think they can divide each step
into thousands of microsteps, with full accuracy. Clearly, the micro steps
quickly become meaningless, if the step accuracy is something like 5 or 10%.


Jon