Correction of the punch position The punch unit positioned inside of the side edge of paper by 5 mm or 10 mm performs the following procedures to correct the punch position so that the punch is always centered on the paper. The punch position is corrected by moving the punch unit to and fro during conveyance of the paper. Punch unit Center of punch edges Paper edge sensor 5mm or 10mm Punch edge G When finisher entrance PS (PS704) detects the leading edge of the paper, the punch unit is moved backward temporarily until the paper edge sensor detects the side edge of the paper.
If punching is performed for the paper conveyed from PI, the time when PI passage PS/U (PS201) or PI passage PS/L (PS206) detects the leading edge of the paper becomes the starting point. Front G Subsequently, the punch unit moves back frontward until the paper edge sensor re-detects the side edge of the paper (Detection of side edge reference position). G When the side edge reference position is detected, the punch unit is again moved to position the center of punch edges to the center of the paper. The distance and direction of this movement differ from paper sizes. Only when moving backward, the punch unit makes a stop at the side edge reference position.
Paper center Paper Punch In the punch mode, the finisher conveyance motor (M701) turns off to stop the paper conveyance temporarily when the specified time has passed since the finisher entrance PS (PS704) detected the trailing edge of the paper, and holes are punched. During punching, the drive force of the punch motor (M801) is transferred to the shaft to rotate the shaft once. As the shaft rotates, the eccentric cams at both ends of the shaft rotate to lower the punch edges, making holes in the paper.
After the punch is finished, the punch unit moves to the side edge reference position when the specified time has passed since the trailing edge of the paper is detected by PS704, which makes a standby status for the punch process for the following paper. 8 Punch kit overview ENWW Direction of paper conveyance