Fanuc: Parameter 1860 _best_

Primarily referenced during "Home Position" (Reference Return) recovery after battery failure or motor/encoder replacement. ⚙️ Usage and Configuration

After making changes, you must verify the results. For rotary axis reference point settings:

These detectors use a battery back-up system (or mechanical gears) to retain the exact physical position of the axis, even when the main shop power is completely shut down. When you turn the machine on, it instantly knows exactly where it is. fanuc parameter 1860

FANUC parameters form the operational backbone of any CNC machine tool, and parameter 1860 is one of the most versatile and frequently misunderstood settings in the FANUC control system. This comprehensive guide explains everything you need to know about FANUC parameter 1860, including its multiple functions across different system models, how to configure it correctly, and how to troubleshoot common problems related to this critical parameter.

To understand why Parameter 1860 is so critical, you must understand the difference between the two primary types of feedback loops: When you turn the machine on, it instantly

Used for setting the Absolute Position Check and Absolute Position Zero for rotary axes. Summary Table Description 1860 Reference Position Updated 1860 Reference Position Not Updated (Scale without speed data) 1861 Reference Position Coordinate

The backup battery for the absolute pulsecoder is dying. To understand why Parameter 1860 is so critical,

0 (Disabled, relying purely on standard parameter 1851 backlash compensation) 20 to 70 (With 50 being a standard baseline) Related Parameters

For most daily operations, a machinist will never need to look at 1860. However, it becomes vital in two specific scenarios: Recovery from APC Alarms

Marina didn’t answer. Parameters were numbers. Numbers were easy. But this machine had a history—previous crashes, a motor swap from a donor machine, and a maintenance log written in disappearing ink.

When working with parameter 1860 for rotary axis applications, several critical restrictions must be observed. This function is available only for rotary axis A-type with an absolute position detector (absolute pulse coder). It cannot be used with a rotary scale that uses distance-coded reference marks (serial) or a distance-coded rotary scale interface (phase A/B). Additionally, you must set this parameter for a rotary axis A-type using a scale without rotary data, while ensuring it is set for a rotary axis A-type using a scale with rotary data.