Table of Contents
Advertisement
CHAPTER 4 OPERATION
5.4
Reducing the Copying Speed
5.4.1
Outline
The machine is not equipped with a paper width detection mechanism; for this reason, if
paper with a limited width is used in continuous printing, the ends of the fixing heater
would overheat. To prevent overheating, the machine switches among 3 copying speeds with
reference to the readings of the sub thermistor.
1. Normally, the machine reduces the speed to 4 ppm when the reading of the sub ther-
mistor reaches 245°C or higher.
2. The machine will further reduce the copying speed to 3 ppm if the reading of the sub
thermistor reaches 260°C or higher after it has reduced it to 4 ppm.
3. The machine will further reduce the copying speed to 2 ppm if the reading of the sub
thermistor reaches 260°C or higher after it has reduced it to 3 ppm.
5.4.2
Auto Delivery Control
The machine drives the main motor (M1) for a specific period of time to feed/delivery
roller when the power is turned on, when the reader unit is returned to its initial position, or
when it shifts from ESS control, in addition to the following:
a. after starting the main motor (M1), the paper leading edge sensor (PS102) detects paper.
b. the size of the paper delivered last is B5 or smaller, and the delivery sensor (PS3) detects
paper after the main motor (M1) is started.
4-22
COPYRIGHT © 2001 CANON INC.
Chapter4.p65
CANON imageCLASS D600s/PC1060s/PC1200s/iR1200s REV. 0 SEPT. 2001
22
8/26/01, 3:44 PM
Advertisement
Table of Contents
Troubleshooting
