I built the same machine about a month ago. I used the hobbycnc board and 80 oz/in. motors, but I'd recommend either the 127 or 200 oz/in that he sells now. I started out with a AT power supply but soon upgraded to a 24 V that I found on ebay. I'm now looking at modifying a amp power supply to get 35 to 40 volts out of. JGRO's design has plenty of adjustment built in to make it accurate. I thought about doing the steel angle iron myself, but I found that the aluminum was much easier to mill with the wood equipment I have. By the way, I didn't install home/limit switches as I haven't found that I need them. I may wire a emergency stop switch eventually to the limit switch. Other than that, most of the stuff I mill is within the table limits and it doesn't move fast enough (10-15 ipm) to cause much concern.
Darren |