Hi
I run a arrow 500 Acramatic 2100 control. Mainly produce mold parts
Recently I did a job were a block was ground square I picked it up in center. Did some milling found out I was of center
Did some tests.
If I machine the complete block profile an say a bore the bore is perfectly in center
If I take a ground block indicate it in center mill a bore it is off center in x by .002 and y .001
Take the same block indicate it in center shift my x and y mill bore I is good
What could be causing this

Thanks Joe