Fiber Laser Cutting Machine Troubleshooting Guide

Problem 1: Frequent Protective Lens Burnout

Causes:

• Contaminants on lens surface absorbing laser energy

• Insufficient or misaligned assist gas flow

• Cutting unsuitable materials with wrong parameters

• Damaged or poor-quality lens holder

• Incorrect focus position or power density

Diagnostic Steps:

1. For black spots: Check piercing parameters and focal position

2. Verify start delay in global parameters is set to 0

3. For white spots: Check air compressor maintenance and tank drainage

4. Inspect lens optical quality

Solutions:

• Adjust start delay to at least 200ms

• Drain air tank daily (2-3 times in hot weather)

• Replace with original manufacturer lenses

  
  

  

Problem 2: Flying Cut Interruptions

Causes:

• Encoder direction error

• Faulty encoder cable or feedback signal

• Damaged control card

Solutions:

1. Reset encoder values by sending 10,000 pulses to X/Y axes

2. If display shows -10,000: Reverse encoder direction in platform config

3. If display shows 0: Check 15-core cable, then 62-pin connector, then control card

   
   

   

Problem 3: New Machine Water Flow Alarm

Causes:

• Airlocks in cooling system

• Partially closed water valves

• Kinked coolant hoses

• Low chiller coolant level

Solutions:

1. Bleed air from system by disconnecting hoses at laser head

2. Run pump until bubble-free flow is achieved

3. Check all valves are fully open

4. Inspect all hoses for kinks

5. Top up coolant to proper level

Maintenance Recommendations:

• Daily: Drain air tank, inspect lenses

• Monthly: Check chiller coolant level and temperature

• Quarterly: Perform encoder calibration

  
  

  

For persistent issues, contact technical support with:

• Machine model and serial number

• Detailed description of problem

• Any error codes displayed