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Punch drive
Punching is driven by the punch drive motor [A]. The punch home position is detected by the punch HP sensor [B].
Punch drive motor rotation control feeds back the encoder wheel rotation speed detected by the punch pulse wave count sensor [C] to the punch drive motor.
Punching is performed by moving the punch unit once back and forth, by rotating the punch shaft 180 degrees from the home position.
In the home position, the punch HP sensor is ON. The first sheet is punched by rotating the punch shaft 180 degrees in the forward direction, and is completed when the punch HP sensor switches from OFF to ON. The 2nd sheet is punched by rotating the punch shaft 180 degrees in the reverse direction, and is completed when the punch HP sensor switches from OFF to ON.
For 2 hole punch [D] and 3 hole punch [E], the timings are different.
