In a message dated 98-01-30 17:15:42 EST, you write: << I have a couple of stepper motor which seem to have pretty high resolution (+100 div/rev). The lable reads "RapidSyn" , Model 23H-05D. I did a quick web search for more info about them, but found nothing. Anyone with knowlegde, or even information about where to get information please email me. >> Arron, I'm not sure but you can try a company called Superior Electric. I don't have the catalog in front of me but they sell stepper motors & ac synchronous motors called "slo-syn" motors. Maybe "rapid-syn" is another model. Allan