Back Gauge; Die Set - GBC AdvancedPunch Technical & Service Manual

Section 2

2.7.2 Back Gauge

Table 2.2Back Gauge Troubleshooting
Symptom
Deep punch or angled deep
punch from leading edge of
the paper.
Cannot remove the Die Set.
Punches occur 2 to 4" into the
sheet.

2.7.3 Die Set

Table 2.3Die Set Troubleshooting
Symptom
paper jams.
Excessive .
Paper does not exit after being
punched.
2-10
Probable Cause
Broken weld on paper stop, Back Gauge
paddle.
Broken or missing Back Gauge linkage
springs.
Back Gauge paddle is not in the fully
opened position and is contacting the Die
Set.
Broken weld on paper stop, Back Gauge
paddle.
Broken or missing linkage spring or springs. Replace the spring. See
Solenoid plunger stuck.
Solenoid plunger worn.
One or more broken or missing linkage
springs.
Back Gauge paddle is not fully closing,
leaving a gap that the paper can slip
through especially when using paper with
heavy curl.
Under normal conditions, the Advanced Punch may experience one paper jam in
5000. Excessive paper jams, such as one in every 1000, requires servicing. The
cause may be the Die Set.
Probable Cause
Worn Die Set.
Defective Die Set.
Excessive oil on punch pins. Chad and
paper dust sticks to the punch pin tip.
Floating pressure bar not retracting.
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Corrective Action
Refer to section 4.8.3
Replace the unit.
Replace the Back Gauge assembly as
explained in section 4.8
Turn the Punch Cycle Knob to ensure the
punch drive indicator is lined up with the
position indicator.
Refer to section 4.8.3
Replace the unit.
"Solenoid Spring
Replacement" on page 4-46.
Clean the solenoid. See "Back Gauge
Solenoid Inspection and Cleaning"
Section 1.4.11
.
Replace Back Gauge. See "Back Gauge
in Section 4.8.
Assembly"
Replace the Back Gauge assembly as
explained in section 4.8
Adjust Back Gauge adjustment. See "Back
Gauge Assembly Adjustment" on page 4-
48.
Corrective Action
Replace Die Set if it is worn out, greater
than 500K cycles.
Replace.
Clean pins to remove excess oil. Lubricate
with approved lubricants only.
Section 1.3.4.
Replace pressure bar springs when
applicable. See "Floating Pressure Bar
Spring Replacement" on page 1-7.
Advanced Punch Service Manual
in
Refer to