About 0.0002" x and y, and head nod (an X3 sticky quirk) of about 0.0015.
Repeating in Z to 0.0002" with the column bolted to the brick wall,
after going below the position by the head nod amount and coming back up to make it settle. Programmed backlash of sorts?
Spindle expansion cold to hot is about 0.002"
It is easier in metric, but these are figures you might comprehend.