For Sale! Roland PNC 3000 milling machine

[Robin Hewitt]

Good stuff Robin, dont forget the pics !

The drive is a 100W open frame AC motor, not too noisy but has a bit of that ol' Black and Decker whine :naughty:

Tempted to fit a silent Ampflow E-150, as used by killer robot freaks...

http://www.active-robots.com/product...w-motors.shtml

The spindle pulley has relective panels which convert to a voltage. That voltage is compared to a variable resistor poking out the back. The mains to the motor is then switched on or off using an opto isolated triac to set the speed.

I'm wondering if I could just divert the motor drive to a 400VA transformer, rectify it and call it DC for the Ampflow. Or, would it boil? It would need a monster cap to smooth it. Where's Irving?

I reckon replace the vee belt with a timing belt and aim for around 1000-> 2000 rpm. Don't think it will handle much over 3mm tooling, 5mm would be pushing it.