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General Mach Discussion / Drifting in the Y axis

« on: December 17, 2009, 05:18:20 AM »

I've had a Sieg KX3 CNC mill for about a year now and it's always had an issue with 'drifting' + in the Y axis. If I zero Y to the edge of the vice then run a program to say cut a pocket in several levels in Z I can see by the faces of the pocket that it drifts (steps on one side, smooth on the other). If I then go back to find the Y edge of the vice again I find that Y has drifted about +0.5mm. This figure will depend upon the length of program run, longer program, bigger drift. Any ideas?

Kind regards
Rob