61255

Common Causes

• Tool physically broken or chipped during cut-off operation
• Spindle speed too high for material and tool geometry causing excessive stress
• Feed rate excessive relative to tool strength and material hardness
• Inadequate coolant flow or pressure preventing proper chip evacuation
• Tool offset or geometry data incorrect in tool table causing interference

Troubleshooting Steps

1. 1Stop program execution immediately and inspect cut-off tool visually for breakage, chipping, or deformation under machine light
2. 2Verify spindle speed and feed rate settings against tool manufacturer specifications for the material being machined; reduce both parameters by 10-15% and retry
3. 3Check coolant system pressure, flow rate, and nozzle alignment to ensure adequate cooling at cut-off zone; clean or replace clogged nozzles
4. 4Review tool offset values and tool geometry data in the machine tool table; measure actual tool dimensions and compare against programmed values
5. 5Run a single cut-off cycle in single-block mode at reduced speed and feed to observe tool behavior; listen for grinding or chatter sounds indicating tool distress