| Revision A |
2.1.4.3 Paper Feed
The paper taken up by the paper
Registration Compensation
To eliminate any paper slant (skew), registration compensation is made by controlling the rotating timing of the paper
The taken up paper passes the timing roller sensor (PC2) and reaches the timing roller. At this moment, the printer delays turning timing of the timing roller for a moment. As a result, the leading edge of the paper is aligned with the timing roller, eliminating any skew. The leading edge of the paper will slack a little as shown in the figure. Next, the timing clutch (CL1) is activated for feeding the paper to the inside of the printer. At the same time, the paper take- up roller turns for a moment to securely feed the paper.
Transport Motor (M2)
Timing Roller
Slack of paper
Paper | Slack |
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Roller |
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Paper | Timing Roller Sensor (PC2) |
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| [Registration compensation] |
Figure | |
Paper Feeding
When the timing clutch (CL1) is activated, torque is transmitted to the timing roller from the transport motor (M2) as follows and the paper is fed to the transfer section.
1) The transport motor (M2) turns counterclockwise. → 2) The idle gear turns clockwise. The timing clutch (CL1) turns ON. → 3) The idle gear turns counterclockwise. → 4) The timing roller turns clockwise. → Paper is fed.
The PC drum is driven by the I/C drive motor (M1). As the PC drum turns, the transfer roller also turns. Accordingly, the paper fed by the timing roller is pinched by the PC drum and transfer roller for feeding to the fusing section.
Retry of paper feeding
If the timing roller front sensor does not detect the fed paper within certain time, paper feeding is performed again.
PC Drum |
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| Transfer Roller |
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| Transport Motor |
Timing Roller | 4 | 1 | (M2) |
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| Timing |
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| Clutch (CL1) |
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2
Paper Path
4108s031
Figure 2-18. Paper Feeding Mechanism
Operating Principles | Printer Mechanism Operating Principles | 65 |
