Canon imagePRESS 1135 Series Service Manual page 93

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Technology > Image Formation System > Various Types of Control > Transfer/Separation
● ITB Displacement Correction Control
To prevent the ITB from being broken due to ITB displacement.
Timing
During rotation of the ITB.
Description
In this control, ITB displacement is detected by ITB belt full displacement sensor (PS6), and
corrected by the drive of the ITB steering motor (M9).
1) If ITB is displaced in the front side or rear side, and ITB belt full displacement sensor flag
changes due to the edge of the ITB.
2) The position of the ITB belt full displacement sensor flag is detected by ITB belt full
displacement sensor (PS6), and if PS6 detects ITB displacement, ITB steering motor (M9)
drives.
3) When M9 drives, steering cam rotates and the support arm moves up and down. Through
this movement, the steering roller leans.
4) The tilted steering roller generates a tension difference on the ITB, and the ITB moves to
the front or rear side.
5) By continuous operation of (1) through (4), the ITB displacement is corrected.
6) The position of the steering cam is detected by the steering roller home position sensor
(PS7).
2 Technology > Image Formation System > Various Types of Control > Transfer/Separation
PS6
ITB displacement sensor
ITB displacement
sensor flag
ITB displacement sensor flag
PS6
ITB
displacement
sensor
ITB
Steering roller HP sensor flag
Related Error Code
• Steering motor error
E012-0030: the home position of steering motor can't be detected.Steering cam
position error
E075-xxx1: The register value which indicates the position of steering cam exceeds
the upper limit.
E075-xxx2: The register value which indicates the position of steering cam is less
than lower limit.
* The first 3 digits of [xxx] is the register value which indicates the position of steering cam
that is last detected.
Related Service Mode
• ITB position adjustment
COPIER > FUNCTION > INSTALL > INIT-ITB
2-45
Steering roller
ITB
Support arm
Cam
M9
ITB steering motor
PS7
ITB steering motor HP sensor
F-2-58
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