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Punch Unit B702 (For B804/B805)
2.8 PUNCH UNIT B702 (FOR B804/B805)
2.8.1 OVERVIEW OF OPERATION
Skew Correction before Punching
This punch unit corrects for paper skew and then positions the punch unit to punch holes at the correct position. Each sheet is punched one at a time.
Paper feeds out of the copier. The finisher entrance sensor [A] detects the leading edge of the sheet.
The finisher entrance roller [B] stops rotating briefly while the copier exit rollers continue to rotate. This buckles the paper against the finisher entrance roller to correct skew. The finisher entrance roller [C] starts to rotate again and feeds the sheet into the finisher.
These SP codes adjust the skew operation in the punch unit:
SP6130. This SP corrects the punch hole alignment. To do this, it corrects the skew of each sheet by adjusting the amount of time the finisher entrance roller remains off while the exit roller of the machine remains on. For more, see Section "Service Tables".
SP6131. This SP determines whether the finisher entrance roller stops to correct skew when paper enters the finisher. You can use this SP to disable the skew correction. For more, see Section "Service Tables".
Punch Unit B702 (For B804/B805)
Punch Unit Position Correction
These operations (skew correction before punching, and punch unit position correction) increase the accuracy of the punch alignment.
Booklet Finisher & Finishers (B803/B805/ D373/D374/ D636/D637)
Booklet Finisher & Finishers (B803/B805/ D373/D374/ D636/D637)
Booklet Finisher & Finishers (B803/B805/ D373/D374/ D636/D637)
:
The trailing edge of the sheet passes the finisher entrance sensor [A].
The paper position slide unit [B] moves the paper position sensor [C] forward to the edge of the paper.
The paper position sensor detects the position of the paper edge and sends this information to the punch unit board. The machine uses the detected position of the paper edge to calculate the correct position for punching.
The upper transport motor switches on and rotates the feed rollers [D] the prescribed distance to position the paper under the punch unit.
:
Using the result of the position calculation, the punch unit control board moves the punch unit [E] to the adjusted punch position.
The paper position slide unit and its paper sensor, move back to the paper position slide home position sensor [F], and the punch unit fires the punches to make the holes.
:
The feed rollers [G] feed the punched paper out of the punch unit and into the paper path.
Punch Unit B702 (For B804/B805)
These SP codes adjust the punch hole alignment:
SP6-128 Adjusts the punch positions in the direction of paper feed.
SP6-129 Adjusts the punch position perpendicular to the direction of feed. For more, see Section "Service Tables".