Platen Gap Adjustment - Epson DFX-8500 Service Manual

4.8 PLATEN GAP ADJUSTMENT

This section describes how to measure and adjust the Alpha and Beta values for the platen gap mechanism.
The Alpha and Beta values are unique to each mechanism, the preset factory values have been printed on
labels as shown in Figures 4-17 and 4-18. Use these values when resetting the platen gap values after
replacing the main board, the printhead, or the ROM. After replacing the platen, carriage shafts, or carriage,
measure the new Beta values before resetting them.


This measurement is important because it determines the platen gap, so be sure to use the
EPSON exclusive thickness gauge set and tension gauge.
Thickness gauge (0.43 mm) : #F616 (EPSON Part No. B102047100)
Thickness gauge (0.80 mm)
Tension gauge (200 g) : #F545 (EPSON Part No. B765114601)


The printer must be on during adjustment.
When adjusting the platen gap using the Micro Feed buttons, adjust only 1 step at a time.


After you perform this adjustment, perform the bi-directional adjustment on page 4-14.
CAUTION
A L P H A V a l u e L a b e l
Figure 4-16. Alpha Value Location
B E T A V a l u e L a b e l
P r o d u c t i o n N o .
F r o n t F r a m e
Figure 4-17. Beta Values Location
P r i n t h e a d
L e f t F r a m e
ADJUSTMENT
4-11