Also try watching the YouTube movie at the end (the last frame).
New information on the Motor Driver Circuit is (HERE).
Step 1: The Frame
Step 2: The X Stage Rails and Motor
Step 3: X it Stage right
Here's a video on making the bearing fixture.
Step 4: The Y stage
Step 5: Zee Z Axis
Step 6: Get it together
Step 7: What's it Do
I used it to make PC boards. It's real good for engraving name tags and signs. And it's pretty exciting to see it carve a 3D object out of a block of foam or plastic.
WARNING there's a lot to learn about the software. Some venders offer package deals of motors, drivers, and software. That makes it easier but you pay for it.
I'll add more to this later. Send me comments and questions.
Step 8: Easy Mill the movie
Step 9: Engraving
Cutting plastic is no problem but doing the PC board the bit went a little too deep on the left side of the board and took out all the finer traces. This is when you start tweeking on it. Just take some aluminum foil and put it under the rail of the Y axis. So as the stage travels left to right the height of the bit should stay the same.
Notice I'm just holding the material down with masking tape. What I like about this thing is, it's easy to fix these kinds of problems because it's all made from simple elements.
Here's the new video:
Also check out the follow up instructions on Stepper Motor Control: Easy Mill Stepper Motor Controller