Fanuc Parameter 1860 |top| Link

For one terrible second, nothing happened. Then, with a familiar, powerful hum, the C-axis rotated smoothly to its home position and locked with a solid clunk . The tool changer cycled. The spindle warmed up.

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 fanuc parameter 1860

1860 may be correct, but the zero-point offset (Parameter 1850) is misaligned. However, a badly tuned 1860 can also cause “soft lock” – the spindle is electrically oriented but not rigid enough to resist tool change insertion forces. For one terrible second, nothing happened