Hello all,
I have a converted engraver thats running on steppers, driven by Mach3. I had got all the motors tuned and they were running smoothly, real nice pace and hitting the mark to within 0.01mm, when i had adjusted for the backlash. Was playing around in the MDI getting nice results, good pace (same as the calibration tests) and homing to zero fine and moving into the negative range fine. So thought i would give a test run using one of the pre-saved gcode files (road runner i think!) and all of a sudden the motors started having trouble running smoothly! So i tried measuring them and they were losing ground too, re calibrated and they moved fine during this process, so went back to MDI and still sporadic and slightly out. Don't know what has gone on, i'm running in millimeters and most of the pre-saved are in inches but would that affect it? or do the pre-saves have some settings that have over written my settings? Any help would be a few more hairs left in tact!
Boothie