Top Edge Holder Mechanism Operation - Epson SQ-1170 Service Manual

2.1.3.4 Top Edge Holder Mechanism Operation

This mechanism is provided to minimize unprintable area at the top edge of paper. The top edge of
paper fed around the platen is held by the top edge holder plate until the top edge is delivered to the
position where the paper tension roller comes down to hold the paper.
In detail, the top edge holder plate catches the top edge of the paper when the paper is initially fed
around the platen, and then rotates along with the platen while holding the paper. When the top edge
of paper reaches the position where the paper tension roller comes down to hold the paper, the top
edge holder plate is enclosed behind the eject guide plate.
The TE (Top Edge) sensor is used to detect whether or not the top edge of paper is at the position to
be held by the holder plate. It consists of a photo sensor which emits light toward the paper and detects
the reflected light.
The top edge holder plate is driven by the TE motor (a stepping motor) (STEPPING MOTOR, TOP EDGE
HOLDER).
Frame
Platen
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Figure 2-22. Top Edge Holder Mechanism
T Edae Holder Plate
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2-13
TE Sensor
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