20.
Place the Spring Cup (with 12 Belleville washers) over the Enclosure Spacer. In-
sert the Upper Leadscrew Retaining Screw (a 10-32 x 5/8-inch Button Head
Socket Cap screw) into the threaded end of the Leadscrew.
NOTE
If the Spring Cup was removed from the top of the Leadscrew during dismantling:
When you reinstall the Spring Cup, you will need to press down on the upper Leadscrew retain-
ing screw at first, to compress the Belleville spring washers enough to engage the threads in the
top of the Leadscrew.
21.
Use a 1/8-inch Allen wrench to install the upper Leadscrew retaining screw.
22.
Use a 1/8-inch Allen wrench to back the upper Leadscrew retaining screw out
until the top Belleville washer is flush with the top of the Spring Cup.
23.
Retighten the upper Leadscrew retaining screw using a torque wrench set to 40
in-lbs. At this point, the top Belleville spring washer should be about a 1/16-inch
below the top of the Spring Cup.
24.
Finally, loosen the upper Leadscrew retaining screw exactly one complete turn
(360
o
). No Carriage Assembly adjustments are necessary.
25.
Manually raise the Carriage Assembly up far enough to expose the ribbon cable
connector on the underside. Verify that the ejectors on the connector are in the
open position.
26.
Connect the Carriage Assembly's double ribbon cable connector by pressing in-
wards until both ejectors (located on the ends of the connector) lock over the mat-
ing connector on the cable.
27.
Insert the Carriage Cable Clamp into the mating recess on the Carriage casting
(Figure 7-4).
28.
Insert both Carriage Cable Clamp mounting screws (6-32 x 1/4-inch Socket Head
Cap screws) into the mounting holes in the Carriage Cable Clamp
(Figure 7-4), then firmly tighten the screws with a 7/64-inch Allen wrench.
29.
Continue with Section 7.5.3 to lubricate the Leadscrew and recalibrate the unit.
7.5.3 Lubricating the Vertical (Y) Axis Leadscrew
The Vertical (Y) Axis Leadscrew requires relubrication every two years, or after ap-
proximately 200,000 Y-Axis moves (whichever comes first), or whenever the Carriage
Assembly (P/N 500650-01-5) is changed. The number of Y-Axis moves is displayed in
the Maintenance\Display Stats. status screen (see Section 4.6).
IMPORTANT:
Use only Qualstar Leadscrew Lubricant, part number
732-0003-2
, for this procedure.
7-14
Field–Replaceable Units (FRUs)
501380 Rev. B
