Troubleshooting

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Error number or message

• 19002: Debris removal vacuum level low

Carriage

• TEE Board Damaged
• Belt wear

Chiller

• Problems with control over the external chiller (grey PolyScience units only)
• Thermal Head hose connections leak coolant
• Chiller Page - for more troubleshooting information about chillers

Doors

• Isolating the faulty door sensor

Drum drive

• General VLF drum drive, encoder, and PLL troubleshooting
• Belt wear
• Drum spin is rough and noisy
• Hall mode LED 7,8,and 9 on or off at the same time
• Drum turns backwards
• Drum - Timeout on velocity acceleration (error number 6008)
• Drum does not move

Drum Vacuum System (inverter)

• Drum vacuum drive inverter error EF4
• Drum bearings noisy or drum difficult to spin
• Drum vacuum pump fan not running
• Drum vacuum pump overheats (error DVC04)
• Drum vacuum drive timeout reaching reference pressure (error DVC12)
• Drum vacuum system not responding to commands (error DVC08)
• No drum vacuum pressure regulation (errors DVC 13 & DVC14)
• Drum vacuum pump manual operation inoperative
• Drum vacuum system over-current

Encoder (optical encoders)

• General VLF drum drive, encoder, and PLL troubleshooting
• IMAGE: PLL is not able to track drum motion (error number 16011)
• IMAGE: PLL was not able to maintain drum motion tracking (error number 16012)
• DRUM: Index not detected (error number 6013)
• DRUM: Velocity error - drum rotation blocked or PID gain settings wrong (error number 6023)
• DRUM: Position error - drum rotation blocked or PID gain settings wrong (error number 6024)
• DRUM: Hall velocity error - drum rotation blocked or PID gain settings wrong (error number 6025)
• Heindenhein Encoder vibration causes artifacts

Engine

• Timeout moving engine actuator errors
• General VLF drum drive, encoder, and PLL troubleshooting
• Drum: Timeout on velocity settling (error number 6007)
• Drum: Timeout on velocity acceleration (error number 6008)
• Drum: Position Error - drum rotation blocked or PID gain setting wrong (error number 6024)
• Drum: Timeout waiting for TPU hall sensor PW measurement (error number 6026)
• Drum: Plate not loaded correctly on drum, obstruction detected below LEC actuator (error number 6027)
• Drum: Drum hall velocity does not match encoder velocity to within tolerance (error number 6030)
• ALE: plate loaded incorrectly, remove plate from drum (error number 15062)

Exposure heads

• Thermal Head Troubleshooting
• TFX Head Troubleshooting

Flash Cover

• Flash cover scratching table or panels
• Flash cover jams or slides awkwardly
• Flash cover sensors reading incorrectly or intermittently

Head Stage

• ThermoFlex Head stage does not move
• Thermal Head hose connections leak coolant

Imaging and media

• Missing a partial swath
• Wavy artifacts appear on media, then stop abruptly
• Digital Flexography Troubleshooting Guide - TFX Head Only 
• The image is either missing, noisy, or repeated after 53" (approximately)
• Gaps appear in image (“zipper effect”) due to faulty workstation hard drive
• Surface reflectivity is wrong
• Dot gain is out of specification



• Troubleshooting Flexo Press Artifacts 
• Screening Escalation Form 
• 15CentimeterGradient.pdf 



• For more troubleshooting information about imaging and media
  • Thermal Head Troubleshooting
  • Media Troubleshooting

Main drive amplifier (MDA)

• Drum: Timeout on velocity settling (error number 6007)
• Drum: Timeout on velocity acceleration (error number 6008)
• Drum: Drum rotation blocked or PID gain setting wrong (error number 6024)
• Drum: Timeout waiting for TPU hall sensor PW measurement (error number 6026)
• Drum: Drum hall velocity does not match encoder velocity to within tolerance (error number 6030)
• Drum: Servo amp fault (error number 6011)
• Hall mode LED 7,8,and 9 on or off at the same time
• Drum spin is rough and noisy
• Drum turns backwards
• Electrical Noise
• MDA internal fault conditions
• Drum torque test
• Trendsetter VLF Drum drive description

Pneumatics

• VLF Platesetter Planned Maintenance Checklist, 725-00031A

Screen sets

• Qualified Screen Sets: Accugraphics Screen Sets for ThermoFlex Wide Web with Dupont Cyrel Media

Serial/SCSI communications

• Bad Hotlink cable can cause plot problems
• Serial communications with recorder failed
• Poor EMI grounding causes SCSI errors

Table

• Table floatation not working
• Table vacuum not working
• Table drag strip not working
• Film loading problems
• Static causes media to stick to the table

Workstation

• Imaging status bar stalls
• Operator prompts stall
• TIFF Front End v2.0 Troubleshooting page
• TIFF Front End v1.0 Troubleshooting page

See also

• ThermoFlex Wide I Operator Guide - Troubleshooting Chapter