Hey guys, fadal VMC15xt here. Making some casting paterns (long programs, surfacing...) and noticed after a couple of those programs, if I use edge finder and touch reference surfaces in x and y direction - I get about 0,1mm and 0,05mm difference, respectively. Thats about 4 thou and 2 thous,I believe.

I tried to measure backlash following procedure - I get ZERO backlash reading (current BL values are good, previous owner determined them good).

I get that difference after running long programs. I used 2 microns (less than tenth) test indicator. Determined the backlash with the small program from the procedure, and via encoder, manually - same reading, both good.

I have tuned the axis driver quite well not so long ago.
Is there anything I am missing?
What could be the cause of my loss of zero point of the piece?

Thank you all, guys.