1860 !!hot!! - Fanuc Parameter

Cycle the power; the CNC will now write the new position into .

It is generally involved in setting the compensation speed or the type of compensation applied to axis motion to counteract mechanical backlash.

Power down the CNC system.

Errors related to Parameter 1860 usually manifest as positioning inaccuracies or specific servo alarms. fanuc parameter 1860

Yes, this is normal behavior. When you reset APC parameters and re-establish absolute encoder synchronization, new values are automatically calculated and written to parameters 1860 and 1861. These changes should not cause concern as long as the homing procedure completed successfully.

At the heart of how a FANUC control system remembers its physical position is a set of critical parameters. Among them, plays a vital role in defining how the control communicates with the position feedback system.

When things go wrong with the absolute encoder configuration or backup battery, the FANUC screen will flag specific alarms. 1. Alarm 300 (APC Alarm: Axis Need ZRN) Cycle the power; the CNC will now write

: The CNC automatically updates the value in Parameter 1860 as the machine moves.

Fine-tuning this parameter is essential for eliminating surface defects—most notably "quadrant protrusions" or "bumps"—when milling circular profiles or performing complex 3D contouring. The Technical Mechanism of Parameter 1860

: The value in 1860 often uses modular arithmetic, meaning the count "wraps around" once it reaches a certain limit based on the encoder's resolution. Relationship to Zeroing Errors related to Parameter 1860 usually manifest as

Excessively high 1860 causing limit-cycle oscillation near the setpoint.

: Used to enable the absolute pulse coder (Bit 5: APC) and confirm if the reference position has been set (Bit 4: APZ).