counts the clock pulse of hole punch motor by the encoder on the shaft so that the hole punch
controller stops the hole hole punch motor at its home position. Accordingly, the hole hole punch shaft
stops at either home position for 2-hole punching or 3-hole punching. A hole punching is operated by
turning the hole punch shaft 180 degrees from its home position. The hole punch chips are collected
into the hole punch chip box. The hole punch chip box full sensor detects if the box is filled with punch
chips.
Operational sequence of the hole punching operation for 2-hole punching in 2 sheets of paper is as
follows:
1. The hole punch controller drives the hole punch motor to rotate the hole punch shaft 180
degrees clockwise.
2. The hole punch home position sensor turns on and the hole punching operation in the first sheet
is completed.
Punch shaft
Punch home
position sensor
Sensor flag
Punch
Paper
Encoder
Punch motor clock sensor
Punch shaft stops:
Home position for 2-hole
Punch a hole in the first sheet
Punch shaft turns 90 degrees cw.:
Operates 2-hole punching
Punch chip
Punch shaft turns 180 degrees cw.:
Punching operation is completed
Off-centering cam
for 3-hole
Off-centering cam
for 2-hole
3. The hole punch controller drives the hole punch motor to rotate the hole punch shaft 180
degrees counter clockwise.
148 Chapter 1 Theory of operation ENWW
To Next Page
Loading...