Center Tamping; Determining Tamper Home Position; Tamping - Lexmark W840 Finisher Service Manual

Center tamping

Center tamping is used when executing rear stapling (straight).
The tamper positions during center tamping are shown below.
Sensor (front tamper HP)
Front
Front tamper motor
Position Description
1 Front tamper home position—sensor (front tamper HP)
2 Front tamper standby position
3 Front tamper tamping position
4 Front tamper offset position
5 Rear tamper home position—sensor (rear tamper HP)
6 Rear tamper standby position
7 Rear tamper size position
8 Rear tamper offset position

Determining tamper home position

When the sensor (lower media exit) turns "H" (+5 V dc) (light receiving), the front and rear tamper motors on the
compiler unit assembly are activated, and the front and rear tampers start moving.
The front tamper home position is determined when the front tamper enters the sensor (front tamper HP)
sensing area.
In the same way, the rear tamper home position is determined when the rear tamper enters the sensor (rear
tamper HP) sensing area.

Tamping

Tamping is executed after a preset time has passed after the sensor (compiler media present) turns "H"
(+5 V dc) when media is detected on the compiler unit assembly.
Front tamper Rear tamper
Sensor (rear tamper HP)
Rear
Rear tamper motor
Diagnostic aids
4024-XXX
3-19