Determining Tamper Home Position; Tamping; Offsetting - Oki B930 Service Manual

The tamper positions during Center Tamping are shown below:
Front Tamper Home Sensor
Front
Front Tamper Motor
1. Front Tamper home position (Front Tamper Home Sensor position)
2. Front Tamper standby position
3. Front Tamper tamping position
4. Front Tamper offset position
5. Rear Tamper home position (Rear Tamper Home Sensor position)
6. Rear Tamper standby position
7. Rear Tamper size position
8. Rear Tamper offset position

Determining Tamper Home Position

When the Compile Exit Sensor turns "H" (+5 V) (light receiving), the Front and Rear Tamper
Motors on the Compile Tray are activated, and the Front and Rear Tampers start moving.
The Front Tamper home position is determined when the Front Tamper enters the Front
Tamper Home Sensor sensing area.
In the same way, the Rear Tamper home position is determined when the Rear Tamper
enters the Rear Tamper Home Sensor sensing area.

Tamping

Tamping is executed after a preset time has passed after the Compile Tray No Paper Sensor
turns "H" (+5 V) when paper is detected on the Compile Tray.

Offsetting

Offsetting is an operation to shift the position of paper to be ejected to the Stacker Tray so that
boundaries between paper units (sets of paper, job unit, etc.) can be easily recognized.
Offsetting is executed for staple positions.
During Front Stapling (Corner)
Shifts stapled sheets using the Front Tamper by 20 mm to the rear side before ejecting them
to the Stacker Tray.
During Rear Stapling (Corner/Straight)
For paper with a width of 216 mm or more [Rear Staple (Corner)]:
Shifts stapled sheets using the Rear Tamper by 20 mm to the front side before ejecting them
to the Stacker Tray.
For paper with a width of less than 216 mm [Rear Staple (Straight)]:
Shifts stapled sheets using the Front Tamper by 9 mm to the rear side before ejecting them
to the Stacker Tray.
(1) (2) (4) (3)
Front Tamper
2-71
Rear Tamper Home Sensor
Rear
(8) (7) (6) (5)
Rear Tamper
Rear Tamper Motor
FI6P023A1