Cord Tension Check; Cord Tension Adjustment - Wang DW/OS-20 Maintenance Manual

•
•
•
3305
5.2.1.1.12 Cord Tension Check
The Hammer Gauge/Cable Tension Adjustment Tool (WL 580-0225) ·is needed to
check the cord tension.
1. Position carriage at extreme left position.
2. Insert adjustment tool through the right-hand hole adjacent
to the
motor in
the printer assembly base
(see
figure 5-15), and engage
carriage cord in the notch on the
tool upper surface. The bottom
surface of the tool must be flat against the printer chassis.
3.
Check that the cord has sufficient
tension-measuring gap on the tool (tension
is necessary to close the gap)
tension to close the
should not be greater than
4. Position carriage at extreme right and tepeat the cord tension
measurement through the left-hand hole position adjacent to the
motor. If either measurement shows a need for adjustment, go to the
next paragraph.
5.2.1.1.13 Cord Tension Adjustment
1. Move carriage to the extreme left side of the printer.
2. Loosen lock nut on the right side of the printer frame (figure 5-16) •
3. Adjust tension of cord by turning the tension screw on the right side
of the printer (see figure 5-16).
4. Adjust the screw for correct tension when the carriage is on the left
side of unit, as described in paragraph 5.2.1.1.12. Tighten lock nut.
5.2.1.1.14 Backlash Check
1. Turn power on.
2. Load system software.
3. Select printer.
4. Check backlash by rotating platen gear back and forth.
5. Deselect and rotate platen 90 degrees.
6. Select printer, and check for backlash again.
7. Repeat steps 5 and 6 until full 360-degree revolution is checked.
NOTE
Only a small amount of movement is acceptable.
If movement is excessive, adjust backlash as
described below. Ensure that platen gear mounting
screw is tight before the adjustment procedure is
performed.
~
5-19