Setting Shuttle And Counterweight Preload - Printronix P9012 Maintenance Manual

Setting Shuttle and Counterweight Preload

NOTE: The preload of the shuttle and counterweight must be set when
1. Remove the ribbon deck assembly as described on page 6–8 of Chapter
6, Replacement Procedures.
2. Perform steps 1 through 5 of the counterweight removal procedure, as
described on page 6–32 of Chapter 6, Replacement Procedures. This will
provide access to the equipment to be adjusted.
3. Remove the right side panel as described on page 6–4 of Chapter 6,
Replacement Procedures.
4. Remove the dust barrier (8).
5. Insert the force gauge (1) in the hole in the counterweight (2).
6. Insert a 0.003 inch flat feeler gauge (3) between the cam (4) and the right
cam follower (5).
7. Pull the force gauge horizontally to the right. Note the gauge indication
when the feeler gauge comes loose.
a. If the indication is between 12 and 17 pounds, go to step 8.
b. If the indication is less than the lower value, install a shuttle
c. If the indication is greater than the higher value, remove a
8. Insert a 0.003 inch flat feeler gauge between the cam and the left cam
follower (6).
9. Press the rod end of the force gauge against the cam follower yoke (7),
positioning the gauge as close to parallel with the shuttle shaft as
possible.
5–6
improper shuttling action or excessive rattle is detected, or
whenever shuttle drive components have been replaced.
counterweight shim as described on page 5–10 and repeat steps 5
through 7.
counterweight spring shim and repeat steps 5 through 7.
(Figure 5–3)
Alignments and Adjustments