Backlash Value Adjustment For Pf Motor - Epson Stylus COLOR 880 Service Manual

EPSON Stylus COLOR 880

5.2.2 Backlash value Adjustment for PF motor

When you remove or replace the following part, perform this adjustment.
PF motor
Gear 57
PF Roller Assembly
(When the Gear 57 (& loop scale) is removed with the PF Roller assembly, this
adjustment is required)
This adjustment sets the suitable backlash value between the Gear 57 and the
pinion Gear of the PF motor.
The required backlash value is 0.1mm. (over 0mm to less than 0.1mm)
In case this adjustment is not performed correctly, following
phenomenon will occur.
<<The backlash value is too narrow>>
The PF motor dose not rotate correctly based on the
defined current value in the firmware. As the result,
paper feed accuracy is lowered.
It sounds that the Gear 57 and the PF pinion gear is
jarred during the printing.
<<The backlash value is too wide>>
The PF motor dose not rotate correctly based on the
defined current value in the firmware. As the result,
paper feed accuracy is lowered. Especially, the printed
image will lowered around the bottom of the paper.
Before you start this adjustment, make sure that the following parts are
removed on the printer mechanism.
Combination Gear 15, 25
Waste Ink pad assembly (As for the removing, refer to the Section 4.2.4.2)
Left Housing Panel.
Adjustment
Left Sub Frame
Figure 5-4. Combination Gear 15, 25 & PF Encorder Sensor
Be careful not damage the Loop scale when the
Combination Gear 15, 25 and the PF Encorder Sensor.
Adjustment
Combination Gear 15, 25
Left Sub Left Housing
Revision A
122