Adjust the distance between the head surface and the Paper
Guide Front Assy (platen) properly and adjust the parallelism on the 0th column
side and on the 80th
columns side to ensure reliable print quality. Once the Carriage Assy and/or Adjustment
Bushes have been removed or whenever necessary for any other reason, make this
adjustment to correct the deviation of the platen gap.
Position
|
PG Size (mm)
|
Application for Printing (selected from PG flag list for
normal/head rubbing)
|
Sequence
Application
|
PG-APG Home
|
1.2
|
EPSON special thick paper
PGPP, Postcards, Matte, etc.
|
Cleaning
CR measurement,
VH detection
CR home position
Seek
|
PG typ. Mechanical
default
|
1.7
|
Plain paper
EPSON special thin paper, SF, etc.
Rubbing with PG1.2 is avoided
|
|
PG+
|
2.35
|
Envelopes
Rubbing with PG1.2 and 1.7 is avoided
|
|
PG++
|
4.2
|
CD-R printing
|
At ink replacement
|
TOOLS
Thickness gauge: 1.15 mm (x2). 1.3 mm (x2)
& Phillips screwdriver.
The thickness gauge to be used must be free from dust and
dirt and from deformation. Be sure to clean it before use.
Take care that the Print Head is not soiled or scratched.
To ensure high accuracy of adjustment, install the Adapters
in the carriage, and move the carriage right and left by pulling the belt
without holding the carriage.
- Make this adjustment after installing the Printer Mechanism and CISS section. (Install the Linear Scale after adjustment.)
- With L800/L801, four stages of PG setting are available by means of the APG Mechanism. However, make this adjustment with the mechanism in the minimum PG position (PG-: 1.2 mm). (Refer to “1.5.4 APG Unit” (p.41) and below.)
PG POSITION AT PG ADJUSTMENT
Adjustment procedure
Specified PG value: 1.2 ± 0.1 mm
- Install new ink cartridges in the carriage.
- Remove the Cable Holder Frame.
- Check that the APG Assy and the carriage are in the PG-position.
- Move the carriage to the center of the platen, and place 1.15 mm thickness gauge on the left aligning its left edge with the second rib of the Front Paper Guide. And place another 1.15 mm thickness gauge on the right aligning its right edge with the rightmost rib of the Front Paper Guide.
NOTE: The thickness gauge must not be set over
the leftmost rib on the Front Paper Guide.
- Pull the Timing Belt to move the carriage to the left end.
- If the carriage comes in contact with the gauge, adjust the Left Parallelism Bush to raise the carriage to a position where the Printhead does not come in contact with gauge.
- Pull the Timing Belt to move the carriage to the right end.
- If the carriage comes in contact with the gauge, adjust the Right Parallelism Bush to raise the carriage to a position where the Printhead does not come in contact with gauge.
- Move the carriage to the middle area of the platen, and place 1.3 mm thickness gauges at the left and right ends of the platen.
- Pull the Timing Belt to move the carriage to the left end.
- If the carriage does not come in contact with the gauge, make the adjustment again.
- Pull the Timing Belt to move the carriage to the right end.
- If the carriage does not come in contact with the gauge, make the adjustment again.
- Mark the indicated graduation position of the right and left Parallelism Bush, and tighten the screws. (Screw tightening torque: 0.8±0.1 N•m)
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