When a machine is equipped with absolute encoders, it does not require a manual "home" or zero-return operation every time it is powered on, provided the absolute position is correctly saved. Parameter 1860 is the system's "flag" that tells it whether this position is currently valid. 1. The Core Meaning of Parameter 1860
To truly understand how Parameter 1860 functions in the field, let us walk through a real-world scenario from CNCZone, where a user with a Fanuc 21i-TA lost their machine zero after a servo repair.
If Parameter 1860 is set incorrectly (e.g., after a servo swap or battery backup loss), the following issues will occur: fanuc parameter 1860 full
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.
a (mm/s²) = Vc / T
If the rotary axis is showing wrong absolute positions (e.g., it is 180° off) after returning to the reference point.
When you execute G28 X... Y... Z... , the reference point return occurs in : When a machine is equipped with absolute encoders,
Absolutely not. The machine must be in Emergency Stop or at a complete stop with no axis motion.
) is vital for complex multi-axis milling, turning, and profiling. Parameter 1860 works closely with Parameter 1815 and Parameter 1861 to dictate exactly how and when the CNC system refreshes its reference position calculation relative to physical coordinates. The Core Meaning of Parameter 1860 To truly