Fanuc Parameter 1860 Full New! (2026)

In a perfectly functioning machine, this parameter stays at "1" indefinitely. However, certain events will force it to "0," requiring a re-homing procedure:

A technician may manually change this bit to "0" to force a new home position calibration. 3. How to Set or Reset Parameter 1860

If you disconnect the motor from the ball screw, the physical relationship between the encoder and the machine zero changes.

Unplugging the encoder cable or replacing the motor/encoder resets the stored position.

If you encounter an absolute pulse coder alarm (like Alarm 300), you must re-establish the reference position. Simply typing "1" into Parameter 1860 is usually not enough; the CNC must "see" the machine reach its physical home first. Step-by-Step Recovery Procedure: How to Enable Parameter Write Enable (PWE) on a Fanuc CNC

In a perfectly functioning machine, this parameter stays at "1" indefinitely. However, certain events will force it to "0," requiring a re-homing procedure:

A technician may manually change this bit to "0" to force a new home position calibration. 3. How to Set or Reset Parameter 1860

If you disconnect the motor from the ball screw, the physical relationship between the encoder and the machine zero changes.

Unplugging the encoder cable or replacing the motor/encoder resets the stored position.

If you encounter an absolute pulse coder alarm (like Alarm 300), you must re-establish the reference position. Simply typing "1" into Parameter 1860 is usually not enough; the CNC must "see" the machine reach its physical home first. Step-by-Step Recovery Procedure: How to Enable Parameter Write Enable (PWE) on a Fanuc CNC