I thought I'd keep posting every now and again, although this stuff is cnc electronics rather than ballscres and the like just yet.

Enclosed a pic of board v2 at the top of the picture which has quadrature, pwm output, and lcd input. Much less messy than board one and more glitch free.
Board three will be sans 5v regulator circuitry . Thats because i've build the PSU board (bottom of picture ) to provide regulated 5v for uprocs and 15v to power the pwm board thats in the works.

heatsinks on the psu board not too necessary now but were with the damaged 15v and 5v regulator i had on the board. switching reg rather than linear are used. heat dissaption with linear regs was troublesome and frankly i just wondered whether the switching reg ic were useable. and they are. fried two of them when i put the diodes in the wrong way around. ooops. i didn't know i had until i realised how hot they got. hence heatsinks. then replaced with new regs and the heatsinks dont seem to be necessary. But cant hurt especially under hihger loading than i have tested with.

pwm board will be used for driving 1000w dc motor thats going to be the spindle motor for the cnc mill. h bridge with ir2110 uder microp control. hefty heatsinks and mosfets. with temp sensing and current measurement fed to microp. No small order. especially dealing with limit volatge spikes due to inductance and motors etc.

anaheim automation are supplying 3 nema 48v ~600W BLDC motors so I'll be building a controller for them at some stage.

Again yep, might be easier to buy controllers but i did want to make them.


Rgds.,

Simon