Not the hack o’ the day, but you guys might have noticed that I’ve been pretty quiet on the engadget How-To front. I’ve been spending all my spare time in my garage working on a CNC conversion for the mini mill I bought a few months ago. It features pic based microstepping controllers that handle up to 54 volts and 3amps. I settled for a modified PC power supply for now. I’ve got plans for this thing, including some stuff just for Hack-A-Day. All the mechanical and electronic work is completed; now I’m taking a breather while I wait for the actual beefy stepper motor for the Z-axis pictured above. I celebrated with a coffee stout.
Ben Heck and I got into converting a mill to be a CNC machine during our podcast interview. Today I found a pair of great write ups at balbots on modding the Harbor Freight mini mill that I mentioned. Part 1 get into all the details of converting the mill to use stepper motors, and adding a cooling system. Part 2 covers upgrading to DC servo motors and replacing the gears with a belt drive system.