Backlash Of The Carriage Motor And Belt Driving Pulley - Epson LQ-1500 Service Manual

Move and adjust the H.P. sensor board so that T3 reaches 300 to 600 us just before the
STEP 7:
adjustment is performed.
Securely tighten the setscrew.
STEP 8:
Confirm that the sensor of the H.P. sensor board and sensor interseption plate of the car-
STEP 9:
riage do not contact with each other when the adjusting lever is set at the highest or lo-
west level.
4.4.3 Backlash of the carriage motor and belt driving pulley (Fig. 4.24)
If print alignment with both directional print is bad, adjust the backlash.
STEP 1: Loosen the setscrews (CPO M3 x 6) which tighten the carriage motor frame and carriage
motor mounting plate.
STEP 2: Adjust the backlash between the motor pinion of the carriage motor and the belt driving
pulley.
(Standard value: 0.05 to 0.15 mm)
1) Adjust the backlash by moving the carriage motor.
2) Confirm the backlash at three points during one rotation of the belt driving pulley.
STEP 3:
Securely tighten the setscrews (CPO M3 x 6).
Fig. 4.23 H.P. sensor
Fig. 4.24 Backlash of the carriage motor
4-15