Operating Principles
Rev. A
2-
2.2.5 Platen Gap (
) Adjust Mechanism
The adjust mechanism, located at the top right of the printer cover, allows the user to set the proper
platen gap (distance between paper and nozzle surface) for the paper thickness to prevent ink smudging.
The adjustment mechanism consists of the adjust lever, guide shaft, and parallelism adjust
bushings. Switching the lever from “0” to “1” turns the guide shaft which joins to the lever. Since the
joint for the parallelism adjust bushing and guide shaft has an eccentricity toward the guide shaft, the
guide shaft moves from or toward the platen as the lever moves. With this movement, the platen gap also
changes from wide to narrow or vice versa.
Paper Type Adjust lever Position PG Adjustment Value
Cut Sheet, Sheet,
Label, Continuous paper
Rear 0
Envelope ,Card, Index card Front + 0.7 mm
Table 2-5. Platen Adjust Lever Positions
Parallelism Adjust Bushing
Eccentricity
Platen Surface
Platen Gap
CR Guide Shafts
PG Adjust Lever
Printhead
0
(Rear)
+
(Front)
Figure 2-8. Platen Gap Adjustment Mechanism
