Adjustments; Paper Gap Adjustment - Epson 440 Service Manual

EPSON Stylus Color 600 Service Manual

4.2 Adjustments

This section describes the detail procedure of each adjustment.
4.2.1

Paper Gap Adjustment

The paper gap is a distance between nozzle surface of the printhead unit and a paper surface and is
adjusted to specified gap at the assembly. Therefore, if the carriage assembly is removed from the printer
mechanism for any reason, this adjustment should be made to fix the gap.

Do not scratch the surface of "PAPER GUIDE, FRONT;B" and "ROLLER, ASSEMBLY, PF".

Be careful not to damage or make dirty the nozzle surface of the printhead unit.
[Paper gap - Right-hand side Adjustment]
1. Attach both "BUSH, PARALLEL ADJUST" (L/R) to the side frame and align the position mark on
top edge of it to a notch on the edge of the side frame.
2. Set "LEVER, PG" to front side (Position "0").
3. Move the carriage assembly to the middle, and put the thickness gauge at the position specified in
he figure.
4. Move the carriage assembly over the thickness gauge.

The thickness gauge must be placed on a flat surface of the ribs of "PAPER GUIDE, FRONT;B".

During adjustment, always pull the timing belt to move the carriage assembly.
5. Shift the position of "BUSH, PARALLEL ADJUST, RIGHT" to backward (Gap: Narrower) until when
the thickness gauge starts sliding together with the carriage assembly when you move it to right
and left for about 20mm.
6. At the point of above step, shift the position of "BUSH, PARALLEL ADJUST, RIGHT" for one notch
to forward (Gap: Wider).
7. Then, confirm that the thickness gauge do not slide when you move the carriage assembly, with
either "LEVER, PG" is at position "0" or "+".
[Paper gap - Left-hand side Adjustment]
8. Repeat the above step 2 to 7 with "BUSH, PARALLEL ADJUST, LEFT".
[Gap Confirmation]
9. Repeat the step 3 to 4 again.
10. Confirm that the thickness gauge do not slide when you move the carriage assembly to right and
left for above 20mm.
11. Shift the position of "BUSH, PARALLEL ADJUST, RIGHT" for one notch to backward (Gap:
Narrower) and confirm that the thickness gauge is sliding by moving the carriage assembly. If not,
return to step 1 and repeat adjustment again.
12. If the gap is correct, shift "BUSH, PARALLEL ADJUST, RIGHT" for one notch to forward (Gap:
Wider).
[Fixing "BUSH, PARALLEL ADJUST"]
13. Fix both bushes with 2 screws (1 each : No.1).
When the paper gap adjustment complete, confirm that the overlap of printhead nose and "CLEANER,
HEAD".
1. Move the carriage assembly next to "CLEANER, HEAD".
2. Confirm that the overlap of printhead nose and top edge of "CLEANER, HEAD" is more than
0.5mm.
4-2
CAUTION
WORK POINT
Rev. A