Gregg Eshelman wrote: > > Over $900 for one driver and motor. Ouch! Were you planning on keeping the original servo amplifiers? Then, all you need is a compatible motor assembly. You can get the SEM motors on eBay for a couple hundred $. > I only have $800 worth of labor in trade invested so far into this mill. I > expect I can sell the two old motors and the Crusader M bits and pieces to > get some $ towards the refit. > > How about something like this kit? http://www.ebay.com/itm/380690297159 > That is a toy for homemade routers and such. I'd keep what you have and just get a replacement motor. SEM motors are VERY good. (Somebody said your motors were actually made by SEM, and Bridgeport STILL uses these same motors on current machines.) If you want to replace ALL the electronics, and that may be a very good idea, then there are a couple ways to go. One is to stay with velocity servo amps, and there are AMC and Copley amps that you can get on eBay quite reasonably. Then, you need either a Mesa or Pico Systems interface. From Pico Systems (that's me) it is the PPMC analog-out interface board set. Or, we have a PWM system that is all digital between the controller and servo amps. That would be our Universal PWM controller and PWM servo amps. Mesa has a similar system, too.
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