... Plate uw0111 was drilled on April 5 and plate uw0112 was drilled on April 7, 1996 . ... No quality holes were included on these plates since they had not been specified when the plug-plate drilling files were produced.) ... Figure 4: Temperature measurements of the spindle housing, dial indicator measurements of the displacement of the front of the spindle housing and CMM measurements of the location error of plug-plate holes for uw0112 are used to infer the motion of the spindle axis v. time. ...