Roland CAMM3 PNC-3000 Desktop Mill

**John S** · 19-01-2012

Didn't realise they were only 100 watts spindle motor. How easy is it to swap the motor out for something with more grunt ?
Reason i ask is I bought one from a school a while ago but it's in storage at the moment.

**Robin Hewitt** · 20-01-2012

Originally Posted by John S

Didn't realise they were only 100 watts spindle motor. How easy is it to swap the motor out for something with more grunt ?
Reason i ask is I bought one from a school a while ago but it's in storage at the moment.

I put in a half horse Amp-flow DC motor with a timing belt and an ER16 chuck. Hassle is the motor control is an zero cross over clipper feeding mains to the motor which has to go for DC. OTOH it does give the spindle revs as a voltage at the motor control board which is a small seperate item and easily replaced. It has a pot on it for speed control.

It runs a Z80 processor and you can pull the EPROM and reprogram it. It steps on the NMI which is a bit odd until you get the idea, you use INT for comms. I found the best feature was the 400 full step per rev motors, having half the usual pull in makes them rather wonderful.