Dean It does look good for a unipolar driver. The price is a plus for sure. I see that the step and direction pins are reversed from the EMC pinouts. Ray On Wednesday 15 May 2002 20:19, you wrote: > Looks to be a pretty good constant current driver > for a good price. Anyone on the list used it? > > http://www.brewingtontech.com/3_axis%20driver.htm