Applies to

• VLF Platesetter with laser flyoff system
• VLF Trendsetter with laser flyoff system
• Platesetter 3244
• Trendsetter 3244

Description

• flyoff did occur and was sensed correctly.
  This is the correct behaviour. Remove plate.
• no plate flyoff is observed.
  This indicates that the flyoff beam has been interrupted, possibly by loss of power to the emitter or system alignment has been disturbed.

Solutions

• Make sure that a plate flyoff did not in fact occur.
• Remove plate, check for slip sheet picks, or plate handling problems
• Check that the system is reading the sensor signal by using the drum command (drum module version 1.07 or later): drum-flyoff laser sensed yes/no
• If the laser emitter's power indicator (green light) is not on:
  On the VLF Platesetter, check that the abort switch at the front doors has not been tripped.
  Check that the door switch magnets are working using the reed switch tester (10-3622A).
  Check the power cable for breaks or disconnection.
  Check the voltage at the power cable inputs
  - 3244 Engines : 24 volts at the LUE board connector
  - VLF Platesetter: 24 volts at the abort switch junction
  - VLF Trendsetter: 12 volts at backplane connection
• If the laser receiver's power indicator (green light) is not on:
  Check the cable for breaks or disconnection.
• If the laser receiver's signal indicator (yellow light) is not on or flickering:
  Check for laser beam obstructions (possibly the belt guard)
  Check that the beam hits the detector squarely in the center of the sensing area. Adjust
  beam location if necessary.
• Check the system for stability when drum starts and stops. Refer to the Laser plate flyoff adjustment procedure (VLF Trendsetter or VLF Platesetter).
• Adjust the plate flyoff sensor.
• Make sure that the NVS parameters SYS tstate and SYS tstatus are at their default values.
• Check that the LUE board on 3244 engine. It may not be receiving/ sending out signals. Replace if necessary.

Notes

The flyoff laser emitter is interlocked with the front door sensor loop. To inspect the flyoff detector system, the door reed switches need to be defeated with magnets. The command mask door creo does not work. Be sure to remove magnets when finished.