20-3.Fusing Roller Cleaning Mechanism; Cleaning Web Take Up Mechanism - Minolta Di450 Service Manual

20-3. Fusing Roller Cleaning Mechanism
(1)

Cleaning Web Take Up Mechanism

• The Cleaning Web wound around the Web Roller is taken up by the Web Take-Up Roller
which is driven by the Cleaning Web Take-Up Motor.
• The Cleaning Web Take-Up Motor turns one turn in every 7 to 14 copies made to take up
the Cleaning Web. ( )
: The length of the Cleaning Web taken up per one revolution of the motor varies
depending on the amount of Cleaning Web that has already been taken up. That is, in
the beginnings of a new roll of Cleaning Web, a shorter length of web is taken up per
one revolution of the motor, as there is very little amount of web taken up by the Web
Take-Up Roller. The more the web is taken up, the longer the length of web taken up.
The copier therefore refers to the count of the "Web Roller" counter and turns the
motor one turn, in the beginnings, for every 7 copies made and, at the last stage, for
every 14 copies made, thereby ensuring that a given amount of web is taken up for
each copy.
• The Web Take-Up Roller shaft is provided with a clutch spring that prevents the roller
from turning backward, thereby preventing the Cleaning Web from developing slack or
wrinkling during take-up.
• There is a gage provided showing an approximate amount of Cleaning Web still available
for use.
Amount of Cleaning Web
Full
Empty
1. Clutch Spring
2. Web Take-Up Roller
3. Oil Supply/Web Feeding Roller
4. Cleaning Web Drive Motor M24
M24
Front
7
6
5
CONTROL SIGNAL
PWB-A PJ7A-15A
M-72
2
1
5. Web Roller
6. Web Regulating Plate
7. Gauge
ON OFF
L H
3
4
Rear
4002M570AA
WIRING DIAGRAM
1 - D