Fanuc Parameter 1860 __link__ Full -
In Fanuc CNC systems (such as the Series 0 Parameter 1860 stores the Absolute Position Detector (Encoder) offset
. This parameter is part of the axis-specific settings (1800-series) and is critical for maintaining machine coordinates without needing a reference return (homing) every time the power is cycled. Key Function & Usage fanuc parameter 1860 full
Battery Failure: Absolute encoders rely on a backup battery to "remember" their position when the power is off. If the battery dies, the position is lost. In Fanuc CNC systems (such as the Series
Dimensional Inaccuracy:
- 0 = Disabled (macro/PMC functions not enabled)
- 1 = Enabled (allow macro/PMC functions)
- Other values may select sub-modes or specific PMC channels — check your manual.
- Jogged Z-axis to a known safe mechanical reference (e.g., a 50.000 mm gauge block between spindle nose and table).
- Measured the difference: Desired zero was 12.345 mm higher than current position.
- Converted to detection units (0.001 mm):
12.345 / 0.001 = 12345 units. - Since current zero was too low (negative offset), needed to shift positive. Added +12345 to existing Parameter 1860.
- Powered off, rebooted.
- Performed reference return.
- Verified with gauge block – perfect zero.
- Parameter 1815.1 (APC) = 0 (Absolute pulse coder not used, or incremental system).
- The feedback is semi-closed loop (motor-mounted encoder only).
This article provides a full technical breakdown of Parameter 1860—its function, its relationship with other parameters, how to calculate it, common troubleshooting scenarios, and best practices for optimization. 0 = Disabled (macro/PMC functions not enabled) 1
Fanuc Parameter 1860 (often referred to as APZ) is a critical configuration setting in Fanuc CNC systems (such as the Series 0i, 16i, 18i, and 31i) that indicates whether the reference position for an absolute pulse coder has been established for a specific axis.