Fanuc Parameter 1860 is a critical axis-specific setting used to store and manage the absolute position data for machines equipped with absolute pulse coders. It works in tandem with Parameter 1815 to ensure the CNC control "remembers" its exact physical location, even after power cycles, eliminating the need for manual zero-return (homing) operations every morning. Core Function and Purpose
When you adjust Parameter 1860, you are not moving the physical limit dog. You are electronically shifting where the control thinks the grid point is. fanuc parameter 1860 full
If the distance measured during the actual return exceeds the value set in P1860, an alarm (typically PS0090 – "Reference position return incomplete" or SV0413 – "Excessive grid shift") may occur. Fanuc Parameter 1860 is a critical axis-specific setting
T = Vc / a = 50 / 4905 ≈ 0.0102 seconds = 10.2 msIn FANUC CNC systems, parameter 1860 is related to the "Long Piece" or "Long Part" function, which allows for machining of long workpieces that exceed the standard travel limits of the machine. Cutting feedrate (F) = 3000 mm/min = 50
| Parameter | Function | |-----------|----------| | 1850 | Grid shift amount (reference position fine offset) | | 1851 | Reference position coarse shift | | 1820 | Number of pulses per motor rotation / detection unit | | 1420 | Rapid traverse speed | | 1421 | FL speed (deceleration speed for ZRN) | | 3003 (bit 5) | ZRN direction selection |
, cycle power, move to the physical home, and set it back to