Hello All,

Just got my new machine running this week and I have a problem that I can not figure out. Any help would be appreciated!!

First of all I am running mach 3 with stepper motors on a 3 axis milling machine. A machine I built

I set the machine up, to start, by using a indicator to insure that it was moving the correct distance when commanded. After I had that set to an accuracy of less than .001 per inch, I made a program and cut some circles and squares. The circles I cut were out of round and the squares I cut were not square. Both figures were off the same amount in each axis. So I reset the "unit per" for each axis to cut the squares and circles to the correct size. Everything then looked good until I cut larger squares and circles. Now the larger figures are not the correct size. Any suggestions as to where to start looking for this problem?

Thanks For any suggestions you may have to offer!!

Allen James