I burned out an old Xylotex board that I had for many years(and working great). I replaced with a new one. Now the motors don't move accurately. I hooked up a pointer on the motor shaft (i did this to make sure it was not a mechanical problem) and jogged it .100" CW and CCW and it does not return to the same position. Doing this several times the motor moved farther away from the starting position in one direction each time. I had it jogging continuously and slowly and noticed it runs faster in one direction then the other. Is this a board problem or software I was using Mach2 but upgraded to Mach 3 to see if it would help... Didn't.

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