Epson R1800 - Stylus Photo Color Inkjet Printer, Service Manual

Page: 141 / 234

EPSON Stylus Photo R1800/R2400 Revision B
Adjustment Adjustment 141
8. To set the PG position to the "--" position, turn the PG Cam on the right end
of the Carriage Shaft clockwise so that the point marked "--" faces down.
Figure 5-8. Markings of the PG Cam
9. Lower the Gear of the Parallelism Adjust Bushing on the left side of the
frame stepwise, and confirm continuity. When continuity is confirmed,
define the position where the Gear was raised one step up from the
continuity position (where continuity is lost) as the left side PG position.
Move the Parallelism Adjust Bushing at least twice to confirm that the
continuity position and the non-continuity position are the same.
10. To set the PG position to "0" or more, turn the PG Cams on both ends of
the Carriage Shaft CCW so that the point marked "0" (or "+" or "++") faces
down.
A D J U S T M E N T
R E Q U I R E D
„
PG Standard Value
•
PG – – (MInus Minus) :1.05mm~1.25mm
•
PG – (Minus) :1.2mm~1.4mm
„
Adjustment Resolution
:
0.06mm
PG Cam
C H E C K
P O I N T
The following figure shows the states of the Adjust Parallel
Bushing of the left side of the frame and the PG. This also
applies to the Adjust Parallel Bushing on the right side of the
frame.)
Figure 5-9. Relationship between Parallelism Adjust Bushing
and PG
Narrower PG
Wider PG
Parallelism
Adjust Bushing