Kirk Wallace wrote: > On Wed, 2007-10-31 at 14:23 -0700, Kirk Wallace wrote: > >>What is the best way to drive a 4hp, 90VDC, 40A spindle motor on a >>Hardinge CHNC? Some of the large DC motors I have seen, look like >>universal motors which would operate on AC or DC. Does anyone know if >>the CHNC spindle motor could work on AC? I'm thinking, a few dimmer >>switches in parallel and a stepper to turn the dials ;). I wonder if it >>would be cheaper to go with a 3-phase motor and VFD. Thanks. > > > I think I found what I want here: > > http://www.zahninc.biz/ch4q1.html > > Now I just need to figure out how to make one for about a quarter of the > price and with PWM input. > Those are actually quite resonable, compared to well-known brands.
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