Instruction manual

110
Chapter 4 Belt, Platen Open, Adjustment (Figure 11)
Belt, Platen Open, Adjustment (Figure 11)
1. Prepare the printer for maintenance (page 106).
2. Cabinet Models: Remove the paper path (page 177).
Pedestal Models: Remove the top cover assembly (page 161).
3. Remove the platen open belt cover (1) by squeezing the top and bottom
to release the plastic tabs from the slots in the side plate.
4. Loosen the two 5/16 inch motor mount screws (2) enough to permit
movement of the platen open motor. (Some motors are mounted with
nuts and bolts; other motors have threaded flanges, eliminating the need
for nuts.)
5. Close the forms thickness lever all the way.
CAUTION Too much tension on the platen open belt can cause the platen gap to
change, which can lead to premature wear of the platen, damaged
hammer tips, and poor print quality.
6. Using a force gauge, apply 10 pounds (44.48 N) of tension to the shank of
the platen drive pulley (3) by pushing in the direction away from the large
platen pulley.
7. Reduce tension to 5 pounds (22.24 N) and torque the 5/16 inch motor
mount screws (2) to 18 ± 2 inch-pounds (2.03
± 0.23 N•m).
NOTE: Belt tension is correct if the belt deflects 1/8 inch midway between the
pulleys.
8. Snap the platen open belt cover (1) into the slots in the side plate.
9. Cabinet Models: Install the paper path (page 177).
Pedestal Models: Install the top cover assembly (page 161).
10. Return the printer to normal operation (page 107).