Fingers crossed it'll cut ally

[Jonathan]

cheers routercnc

will i be ok using the 80A speed controller on a much smaller motor... it would be nice if i could use all three motors without having to swap about with different ESC's

Yes, any motor up to 80A should be fine with that speed controller. Is the speed controller programmable? You may find that adjusting some settings (such as 'timing' and 'frequency') will make the ESC run different motors more efficiently.

im not sure ill bother linking my spindle to the PC, iv got an optical rev-counter, I think ill just dial in whatever speed I want and stick with the simple life

I wonder if mach3 can do this. The input to the speed controller is just a simple PWM signal and mach3 can output PWM for spindle control at a set frequency.

I've got a huge 130kv brushless motor I think I might try as a spindle when I've bought an ESC for it. It's rated for 48v and claims to be 6500W(!) ... hadn't thought of controlling the speed from the computer though.

I agree about using a fan - these motors do get hot even running with no load from my experience. If you've got a lathe then you could make a pretty nice heatsink just by starting with a bar, bore it to fit the motor and add fins using the parting tool...