Specifications

PA/4000 User’s Manual
Section 10, Troubleshooting
Page 8
Possible Cause: Vacuum pressure set too high
ACTION: Adjust the vacuum pressure.
Possible Cause: Label adhesive is not aggressive enough
ACTION: Call Diagraph for recommended label stock for your application.
Problem: The cylinder extends but does not retract right way.
Possible Cause: Auto-retract sensor disabled
ACTION: 1. Determine if the auto-retract sensor should be enabled or disabled.
2. If the sensor is to be enabled but is disabled, determine why it has
been changed. If the sensor was disabled as a test or by mistake,
enable the auto-retract sensor.
3. If the sensor should be disabled, reduce the dwell time to limit the
cylinder stroke distance.
4. Carefully re-examine the above operation before running the conveyor.
Possible Cause: Auto-retract sensor is enabled but the tamp dwell time is
too long
ACTION: 1. Since the tamp dwell delays retraction, it also delays the auto-retract
sensor’s product detection. To compensate, reduce the tamp dwell
by no more than 10 ms at a time.
2. Carefully re-examine the above operation before running the conveyor.
Possible Cause: Auto-retract sensor is not properly sensing the product
ACTION: The auto-retract sensor is a light-reflective device that may not be able
to detect transparent products such as shrink-wrap or have difficulty
sensing light from a rough surface. Adjust the product orientation or
system orientation to apply labels on the best available product
surface.
Possible Cause: Cylinder rods are bent
ACTION: Determine what caused the cylinder to bend and call Diagraph Service
for replacement cylinder kit (6150-830 for a 6-inch cylinder assembly,
6150-831 for 12-inch cylinder assembly and 6150-832 for an 18-inch
cylinder assembly).
Possible Cause: Loss of cylinder air pressure.
ACTION: Check that the OSHA valve is ON.
Possible Cause: Auto-retract turned off on the Hand-Held terminal.
ACTION: Enable the auto-retract on the Hand-Held.