Troubleshooting Quick Reference

Arc won’t start

• Check consumables

• Verify work clamp connection

• Confirm air pressure

THC not responding

• Inspect ohmic sensor

• Check FeatherTouch wiring

• Verify RS485 hub connection

Cut quality poor

• Worn nozzle/electrode

• Wrong torch height

• Wrong cut speed or volts

Random cut interruptions

• Moisture in air supply

• Electrical noise in RS485/USB lines

• Loose ground clamp