I have a Dyna Mite 2400 drill with cnc control, etc. All of a sudden a few weeks ago, a strange problem started. I drill holes in smallcircles (like watch bezels) in various radii, sizes, # of holes etc. All of a sudden as the machine is going around in its program, it goes off track. like it will be making a circle and then jump to the left and continue the circle. When we turn the machine on the Y-axis is for example .0355, then turn it off and on again and its .0415 then off and on again and its .0315, etc. The X and Z axii are staying the same. IT seems as if the Y-axis backlash is changing between runs, and sometimes DURING the run. The machine, when it initializes, measures the backlash and compensates for it, and between runs, or during one, when the backlash changes, the machine is not changing its compensation, but rather compensating for the original # (which is now wrong), etc. Has anyone run into a similar problem and had it fixed?