Canon imagePRESS C1 Service Manual - page 368
Chapter 7
7-19
F-7-20
2. Secondary Transfer ATVC
The secondary transfer ATVC determines the secondary transfer voltage to obtain the target transfer current at the time of transfer.
a. Startup Condition
- At the warm-up rotation after the power is ON.
- At the last rotation after passing 500 sheets.
- At the warm-up rotation.
b. Description
T-7-9
2
Create It - Vt Curve
By adding the predefined voltage (+/-100V: vary depending on the environment) to the voltage value obtained
from the constant current and measuring each current value, create the It-Vt Cruve.
3
Environment Sensor Monitor
The DC controller calculates the correction value from the environment sensor information.
4
Determine the primary transfer bias
The DC controller determines the appropriate primary transfer bias in consideration of the correction value.
Sequence Operation
Description
1
Apply the constant current
By applying the constant current to the secondary transfer roller, feedback the voltage data of the secondary
transfer roller to the DC controller.
2
Create It - Vt Curve
By adding the predefined voltage (+/-100V: vary depending on the environment) to the voltage value obtained
from the constant current and measuring each current value, create the It-Vt Cruve.
3
Environment Sensor Monitor
The DC controller calculates the correction value from the environment sensor output and the print information
(paper type).
4
Determine the secondary transfer bias The DC controller determines the appropriate secondary transfer bias in consideration of the correction value.
Constant Current
+100
Vt1
-100V
Vt
Current (It)
Voltage (Vt)
Target It It