On Friday, Feb 27, 2004, at 09:16 US/Pacific, Alan B. Pearce wrote: >> I built a desktop milling machine a couple of years ago. It used >> 5v rated steppers, so I hooked them up to 5volts. I got no torque >> out of them at all. > > That would be correct. > Really? Is that generally true of steppers, or only for certain classes? I've always known that you could get faster and stronger performance with high voltages an "smart" current limiting, but I always assumed that the rated voltage would result in at least "reasonable" usefulness... BillW -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.