Fanuc Parameter 1860 Link

In certain FANUC control series, particularly when using rotary axes with absolute position detectors, parameter 1860 works in tandem with parameter 1861 to store and manage reference point data. When the machine coordinate passes 0 degrees or the shift value per one rotation (360 degrees or the value set in parameter 1260), the data for the reference position stored in parameters 1860 and 1861 is renewed to ensure proper following at power-on. This ensures that the system can track position across full rotations without losing accuracy.

For rotary tables (4th/5th axes), set 1860 in degrees per minute. A typical range: 1000–3000 deg/min. Because rotary inertia is lower than linear axes (usually), higher 1860 is acceptable, but watch for mechanical lash. fanuc parameter 1860

The spindle drive did not achieve the commanded orientation within the allowed time (Parameter 1862 sets the timeout). Most often, 1860 is too low (weak gain) or too high (hunting oscillation prevents settling). In certain FANUC control series, particularly when using

Other related parameters include:

The confusion surrounding Parameter 1860 highlights a bigger issue in CNC maintenance: the critical need for proper documentation. Always keep: For rotary tables (4th/5th axes), set 1860 in