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121
PLATEN LATCHES (RELEASE ECCENTRICS
AND SPRINGS)
Adjustment
This procedure adjusts both the left and right eccentrics.
However, when adjusting the left eccentric, ensure that
the Platen Release lever does not touch the print head
forms guide· (1 01) when the carrier moves to the far left.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Power off.
Remove the forms tractor (131).
Remove-the printer covers (110).
Loosen, until it is finger tight, the screw
II
that
locks the eccentric nut
II.
Note: When adjusting the right side, remove the
Platen knob and forms tractor drive gear. When
installing, adjust gap to bushing
II.
Press the platen bushing" down and turn the
eccentric nut so that when released, the lever
holds the bushing tightly against the frame.
Hold the eccentric nut in this position and tighten
the locking screw.
Check the platen gear backlash (play) adjustment
(124).
Reinstall the printer cover (110).
Reinstall the forms tractor (131).
Left Side
Right Side
Lever
Spring
(small)
Make sure that the print head
forms guide does not strike
the paper release lever here
when the head moves to the
extreme left.
Lever
Spring
(large)
1-18
122
PLATEN GEARS AND BUSHING
Removal, Replacement, and Adjustment
1.
Power off.
2:
3.
4.
5.
6.
7.
Tilt the forms tractor back.
Pull the front cover forward to the stop and
remove the platen (120).
Remove the knob from the gear end of the platen
(2 setscrews
lIP.
Loosen the clamp collar
II
on the forms tractor
drive gear.
For installation, the bushing
II
must turn freely
with 0.05 mm to 0.13 mm (0.002 inch to 0.005
inch) gap to the gear collar.
Remove the gear
II
and bushing
II·
8.
Remove the 2 screws
II
that hold the platen gear.
9.
Remove the gear
II.
10.
To reinstall the gears, reverse this procedure.
,..-------0
,......-----m
,."
,
I
,..------0
,..-----IJ
/-0
I
,
~
O.05mmtoO.13mm
~
r
(0.002 inch to 0.005 inch)
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