Ribbon Drive Check; Ribbon Drive Adjustment; Daisy Wheel Damper Check - Wang DW/OS-20 Maintenance Manual

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5.2.1.1.22 Ribbon Drive Check
1. Remove ribbon cartridge.
2. Check that the ribbon drive has 8 to 12 ounces (224 to 336 grams) of
spring tension (measure with gram gauge WL
/~726-4417
at the base of
the spike driver). Push at base of spike driver as shown in figure
5-20.
NOTE
Take reading when spike driver begins
to move from the pressure applied by
the gram meter.
5.2.1.1.23 Ribbon Drive Adjustment
1. Open grip ring and rotate it around motor (see figure 5-21).
NOTE
From a top view rotate grip ring clockwise
to increase tension and counter-clockwise
to decrease tension.
2. Adjust for 8 to 12 ounces (224 to 336 grams).
5.2.1.1.24 Daisy Wheel Damper Check (figure 5-22)
A misadjusted damper assembly may contribute to char:tcter spacing
problems. To check the adjustment:
1. Tilt print head back.
2. Remove Ribbon.
3. Remove daisy wheel.
4. Place ruler edge across dampening bracket and daisy wheel hub (with
·ruler surface against the daisy wheel spindle). Verify that dampening
bracket is set from 0.010" to 0.020" higher than the hub (a 0.010"
feeler gauge should be insertable under the straight edge; a 0.020
11
feeler gauge should not be insertable) .
5-27