Dennis Schmitz wrote:
Not really. Since CAD models are built in a cartesian coordinate system,
somewhere along the way you need to translate into a motor space. Whenever
you translate co-ordinate systems, you get quantization error at the encoder
(or step) resolution.
In the cartesian axis case, I don't think quantization error is a given, because the step resolution can match the coordinate system resolution. In my case, for example, steppers are 200 steps/rev, and leadscrews are 10TPI. That gives a quantization of 0.0005".
So, as long as I specify coordinates in 0.001" increments (which is what I normally do), there's an exact representation in motor coordinates (and no quantization error).
Mike
