CNC bending machine return-to-zero error causes and quick calibration repair methods

English Keywords：CNC tube bender homing error, machine origin calibration, bending machine zero reset fault

Homing failure is a common CNC tube bender fault that stops production startup. 

Main causes include blocked limit sensors, loose wiring, guide rail jamming, lost origin parameters and axis offset after collision. Quick troubleshooting steps: clean sensor dust and oil, check wire connections, eliminate mechanical jamming, recalibrate system origin and restore benchmark parameters. 

Mechanical offset caused by collision needs professional origin correction. 

Regular cleaning and standardized operation effectively reduce homing errors.