Last  year I bought a broken Bridgeport Series II CNC milling machine with the intent to convert it to run on ArtSoft's Mach3 PC controller with Gecko G203V stepper drivers. 

Well, the original intent was to replace only the BOSS 5 controller, but things got complicated.

. . . 

One of my goals for this year is to add some real machining capabilities to my shop. I've been in the market for a milling machine since the beginning of the year and when I saw a Bridgeport series II CNC mill pop up on Craiglist for $1000 I decided to jump at it.

This is an older CNC mill that is in great shape as far as the iron is concerned but, according to the seller, had exhibited some flakiness with the controller after being moved. These things are pretty primitive TTL logic cards feeding power Darlington output transistor that drive stepper motors so I have no doubt that I will be able to fix what ever may be amiss--most likely the boards just need to be re-seated.

Click through and check out my new toy!