Service manual

1
Motor Drive Belts
The two toothed belts (part #12-830), should not require replacement under normal
conditions. It is a good idea to visually inspect each belt for any damage and for proper
tension on a yearly basis. This procedure covers inspection of drive belts and pulleys
only. For replacement and re-tensioning of motor drive belts, see the following section.
Y-axis motor belt access:
Remove the motor / pulley
housing from the top of the
Y gantry. There are two
mounting screws on each
side of the housing; early
machines will require a
1/8” Allen wrench; use a
5/16” nut driver or socket
on newer machines. (see
photos) Avoid using pliers
on these fasteners to
prevent rounding of the
screw heads or marring of
the housing finish.
X-axis belt access: Remove the Philips sheet-metal and hex-head screws from the
bottom of the torque rod housing on the right side of the machine. Remove the larger
Allen bolt from the top of the housing with a 5mm Allen wrench. Then remove the X-axis
belt/pulley cover by removing the two screws from the rear, as shown. (see photos)