Epson FX-80 Operation Manual page 33

1.7.6 Gap adjustment
The adjustment of a gap between the head nose and the platen is used to adjust the
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printing pressure as well as to suit paper of a different thickness.
(1) Move the head adjusting lever (located on the left frame of the printer) forward
or backward to adjust the gap between the head nose and the platen.
Forward: To widen gap.
Backward: To narrow gap.
NOTE:
With a thick paper, be sure to widen this gap.
V-groove
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