Image Transfer
SM 6-75 D014/D015/D078/D079
Detailed
Descriptions
The feedback of three MUSIC sensors [A] control the speed of the drum motor to prevent
color registration errors during full color printing.
There are two ITB position sensors Sensor 1 [C] and Sensor 2 [D] above the encoder strip
scale [E] on the rear edge of the ITB.
ITB position sensor 1 monitors the belt speed. The CPU uses this information to adjust
the speed of the belt to account for eccentricity of the image transfer roller, differences
in the thickness of the belt, belt slippage, and the load placed on the ITB by friction
between the rollers at paper transfer.
ITB position sensor 2, located a short distance from sensor 1, ensures that the number
of gradations on the edge of the ITB in the gap between the sensors remains constant.
This detects stretching or shrinking of the belt, and the ITB drive motor speed is
adjusted to compensate for this occurrence.
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