3D Systems CubePro Manual page 13

4. Select the Z: down arrow until the display reads -0.50.
NOTE: For printers with 2 or three print jets, visually inspect the gap
between the nozzle tip of print jet 2 and the print pad. If necessary, press
the Z: down arrow until there is a gap.
5. Press the X and Y adjustment arrows until print jet 2 is closely aligned above the front
print pad adjustment knob.
NOTE: The red line in the illustration demonstrates an approximate
alignment of print jet 2 and the front print pad adjustment knob.
6. Press the Z: up arrow until the nozzle of print jet 2 lightly touches the print pad.
NOTE: If there is still a gap between the nozzle of print jet 2 and the print
pad, and the Z: up arrow will not raise the print pad further, rotate the front
print pad adjustment knob counter-clockwise (from the bottom side) until
the nozzle lightly touches the print pad. If the adjustment knob was turned,
turn it back the same amount and then be sure to perform the print pad
leveling procedure.