Marius Liebenberg wrote: > On 2013/05/04 06:55 PM, andy pugh wrote: > >> On 4 May 2013 17:45, Marius Liebenberg <mar...@mastercut.co.za> wrote: >> >> >>> difficult to see because the error is +/- 1% of the total travel and in >>> one direction only. >>> >> Is the error in measured position or indicated position? >> > > Andy the position is measured physically. > > >> Does either of the commanded position / actual position show the >> expected position (toggle with @, or use the menu, if using Axis) >> > The position shown is the expected position but not the real measured > position. It would seem that it could be missing counts in one direction. > > > I had that problem on my Hardinge CHNC, the position would creep after rapiding back and forth a few times. DRO reading was proper but diameters would change. The X axis encoder coupler was slipping slightly, why it only slipped one way is still a mystery but thats what it was.
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