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Theory of Operation Ver1.0 Jun.2005
4.2.3
Punch position correction control (For explanation, the part number for PK-505 is used.)
For the punch unit positioned from the side edge of the paper to the inside (see "4.2.2 Punch standby position
movement control (For explanation, the part number for PK-505 is used.)"), the punch position is adjusted in the
following procedure so that punching is made symmetrically to the center of paper at all times. The punch posi-
tion correction is operated by moving the punch unit back and forth while conveying the paper.
•
When the FNS entrance sensor (PS4) detects the leading edge of the paper, the punch unit [11] is moved to
the rear side until the paper size sensor (PS305) [2] detects the side edge of the paper. If you conduct the
punch operation on the paper conveyed from PI, it is started when the paper passage sensor /Up (PS201)
or /Lw (PS206) detects the leading edge of the paper.
•
Then, the punch unit [11] is moved to the front side until PS305 [2] detects the side edge of the paper (the
side edge reference position detection).
•
Once it detects the side edge reference position [3], the punch unit is moved further [11] so that the center
of the punch blade [1] is positioned to the center of the paper [5]. The moving distance and its direction are
depending on the paper size. It is stopped temporarily at the side edge reference position if it is moved to
the rear side.
[1]
Center of the punch blade
[2]
Paper size sensor (PS305)
[3]
Side edge reference position
[4]
Paper
[5]
Center of the paper
[6]
Paper transfer direction
Note
• In the model PK-505, the paper size sensor (PS305) is positioned on the front side and its opera-
tion is contrary to that in the above illustration on the right and left sides.
[10]
[11]
[1]
[2]
[9]
[8]
[7]
[6]
[5]
[10]
[11]
[3]
[4]
[7]
Punch unit moving direction
[8]
Rear side
[9]
Front side
Punch blade
Punch unit
4. PUNCH SECTION
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