Fanuc - Parameter 1860

Never adjust 1860 and 1861 (time constant) simultaneously. Change gain first, settle time second.

Understanding parameter 1860 requires familiarity with several closely associated parameters:

Fanuc Parameter 1860 is a critical axis-specific setting used across various Fanuc CNC control series , including the 16, 18, 21, and 0i models. It is primarily responsible for storing and managing the when an absolute position detector (absolute encoder) is used. What is Fanuc Parameter 1860?

. Each axis (X, Y, Z, etc.) has its own bit 4 (the 5th bit from the right) designated as APZ. fanuc parameter 1860

: Controls backlash compensation for the axes. How to Modify (If Required)

These alarms warn you that the battery backing up the absolute encoder data in the servo amplifier is dying or completely dead.

: Used to enable the absolute pulse coder (Bit 5: APC) and confirm if the reference position has been set (Bit 4: APZ). Never adjust 1860 and 1861 (time constant) simultaneously

On certain FANUC control models such as the Series 0i-MC, parameter 1860 serves a completely different purpose related to the .

The two-stage approach allows for more precise compensation than simple single-stage backlash correction. The first stage (parameter 1860) handles the initial movement, while a second stage can provide finer adjustment as the axis approaches its target position.

| Role | Control System | Description | |------|----------------|-------------| | | Series 30i/31i/32i | Stores reference position data for rotary axes using absolute position detectors without rotary data | | First-Stage Acceleration Time Constant | Series 0i-MC | Controls the first acceleration time constant for the two-stage backlash acceleration function | | Angle Data for Rotary Axis Positioning | Various systems | Stores the rotation angle used when coordinate rotation does not occur (range: -360.000° to +360.000°) | | Absolute Encoder Position Reference | Series 21i-TA | Stores reference position values for absolute pulse coders | It is primarily responsible for storing and managing

: Indicates whether the zero-point (reference position) of the absolute pulse coder has been established. The Initialization Chain

To understand Parameter 1860, you must visualize the control hierarchy: