Low Speed Mode (Cpm Down To 70 Ppm); Speed Reduction - Gestetner B070 Service Manual

6.16.5 LOW SPEED MODE (CPM DOWN TO 70 PPM)

The User Tools has a selection that allows the customer to improve the fusing of
images and text to thick paper and tracing paper by slowing down the machine
(System Settings> General Features> Optimum for Thick Paper: Set to 'On'). For
example, the speed is reduced to 70 cpm (350 mm/s) using A4 LEF. With this
setting switched on, the machine speed is not only lowered but this setting affects
process control as well.
In the low speed mode, the speed of the polygon mirror motor is reduced to about
20,000 rpm, and the initial setting for the speed of the web motor on interval is
reduced to 25.3 second (NA) or 15.4 sec. (Europe/Asia).

Speed Reduction

Paper Size and Variable Speeds
Size
A3
B4
A4 SEF
A4 LEF
B5 SEF
B5 LEF
A5 SEF
A5 LEF
Process Control
In low speed mode, the following items are adjusted as described below.
1. Development Line Speed. Does not change.
2. Toner Supply Rate. Uses the settings of SP2209 002 (Toner Supply Rate –
Low Speed).
3. Transfer Conditions. Uses the settings of SP2301 007~012 (Transfer Current
Adjustment) and SP2940 009~016 (Leading Edge Transfer Current)
4. LD Intensity
With process control ON, the amount of light emitted by the laser is reduced by:
LD Adjustment by
Process Control
With process control OFF, the amount of LD adjustment is set to "0" and the line
speed rate/s and quantity of light are reduced.
SM
CÓPIA NÃO CONTROLADA
Speed
30 cpm
40 cpm
40 cpm
70 cpm
50 cpm
70 cpm
70 cpm
70 cpm
x Line Speed Rate
6-135
CÓPIA NÃO CONTROLADA
FUSING
B070/B071