Precision! Kinda.

So now that I got the Dremel cutting things, I decided to test the accuracy of my machine by cutting 1in squares and circles.  I ended up cutting six circles and seven squares. The squares are surprisingly square and the circles are not quite perfect circles, but they are close. So the end result for my accuracy test:

Squares: 0.9818 +/- 0.01729 in
Circles:  0.9720 +/- 0.02246 in

 

I might be able to compensate somewhat with software. I can guarantee that my 1/8" end mill is cutting slightly larger then 1/8", resulting in slightly smaller squares and circles.

I used GCAM to create the G-Code for the test.

Time to make some real parts!