Planmeca ProMax 3D Max with ProTouch Technical Manual page 176

5 Panoramic and 3D calibrations
170 Planmeca ProMax 3D Max
9. Mark the crossing point (A) of the lights (1), (2) and (3) to the ball
phantom.
10. Release the C-arm locking and rotate the C-arm 180 degrees clockwise.
10.a. Lift the C-arm transportation pin.
10.b. Rotate the C-arm 180 degrees clockwise, i.e. turn it around.
10.c. Relock the C-arm in position by pushing the transportation pin
back in the hole.
Technical manual