Fanuc Parameter 1860 -

For specific numerical values (e.g., what the value should be set to for a particular machine), you must refer to the that came with your specific CNC machine tool, as these are tailored to the machine's mechanics.

In the context of Fanuc CNC systems, specifically defines the allowable error (tolerance) for the absolute position detector . It acts as a safety threshold that the system uses to verify the integrity of the absolute position data reported by the encoder. Key Functions & Characteristics

: She navigated to Parameter 1815 and toggled the APZ (Absolute Position Zero) bit to 0 .

Reduce 1860 by 20% and test. If hunting stops, then fine-tune upward in smaller steps. fanuc parameter 1860

Increase 1860 in increments of and repeat until slight overshoot appears.

Even with absolute encoders (Parameter 1815#5 = 1), the initial reference position establishment (APZ setting) uses Parameter 1860. After APZ is set, absolute encoders do not use 1860 during power-on, but any manual reference return (holding P and CAN on boot) will.

This indicates a conflict between the encoder hardware definition in Parameter 1860 and the resolution settings in Parameter 1861 or the servo initialization parameters (Parameter 2000 series). Conclusion For specific numerical values (e

Do not wait for the "Battery Low" alarm. Change your servo amplifier and control batteries every 12 months as part of preventative maintenance.

This is surprisingly common. Many FANUC parameter manuals jump from parameter 1856 or 1857 directly to parameter 1870, with no listing for parameter 1860 or 1861. This omission occurs because not all FANUC systems use these parameters, and their function varies by system model and configuration. Always refer to the specific parameter manual for your exact control model.

Spindle cannot reach within the orientation completion width (parameter 1862) due to mechanical binding or incorrect gain. Parameter 1860 might be so low that the spindle never locks. Key Functions & Characteristics : She navigated to

While Parameter 1850 (Grid Shift) is used for fine-tuning a home position (e.g., moving it by 0.05mm), Parameter 1860 is the foundational "coarse" position data. Safety Warning

On FANUC 0i, 16i, 18i, 21i, and 30i/31i/32i Series controls, defines the Position Detector Type for each individual axis. Specifically, it tells the CNC control what kind of feedback device (encoder) is mounted to the servomotor or the machine slide.

For rotary axes using a scale without rotary data (such as Heidenhain RCN723 or Futaba FRR902L3DB rotary scales), the reference position data stored in parameters 1860 and 1861 does not need to be renewed. This is because scale data without rotary data is always read when the system is powered on, providing immediate position information.

It is typically a 2nd-word (32-bit) axis parameter, often appearing as a large, sometimes confusing number that may wrap around due to modular arithmetic used by the encoder. Role in Reference Position Setting