Fanuc Parameter 1860 [exclusive] Site

If there is an issue with the absolute position data, you may encounter specific :

If you disconnect a motor, replace a ballscrew, or move the axis manually while the power is off, the value in 1860 will no longer match the physical reality. fanuc parameter 1860

If you are tuning a machine, adjust in small increments and listen to the motor. The perfect setting is the one that offers the fastest cycle time without tripping alarms or shaking the casting. If there is an issue with the absolute

The maximum stable 1860 is the highest speed at which the axis stops within 1-2 encoder counts every time. Back off by 10-15% for margin. The maximum stable 1860 is the highest speed

Keep a log of original 1860, date of change, and observed behavior. Copy parameters to a memory card before tuning.

While often factory-set by the Machine Tool Builder (MTB), it typically represents a distance (often in microns or pulses). If you must adjust it, always refer to your specific Fanuc Parameter Manual for the correct unit of measure (e.g., 0.001mm).

“I have to teach it.”