Mechanical to Magnetic Center Offsets.  These are the distances the stages moved from the mechanical center to the magnetic center. 
  Axis        Offset                   B Field 
               (mm)                      (G)
X	        -0.1800		         0.02 +/- 0.01
Y            -0.0463		         0.01 +/- 0.05
Z	        0.0016		         0.16 +/- 0.05