Fanuc Parameter: 1860 ~upd~

When setting up or re-establishing reference points on a FANUC-controlled machine, parameters 1860 and 1861 are often cleared as part of the procedure. A typical workflow follows these steps:

Parameter 1860 (often displayed as ) defines the decelerated feedrate that an axis uses after it detects the reference return deceleration dog (limit switch) during a manual or automatic reference position return (G28).

In some situations, parameters 1860 and 1861 may not restore correctly after a power cycle. This is typically addressed by checking that parameters 138#2 (APS) and 1807#5 (APR) are both set to 0. If these are incorrectly configured, the reference point data may not be preserved properly. fanuc parameter 1860

When the two-stage backlash acceleration function is enabled, parameter 1860 defines the . This value determines how quickly the servo system accelerates during the initial stage of backlash compensation. Related control parameters include No.1957#6 (which selects the acceleration mode) and No.1987 (which sets the acceleration value for each direction).

Parameter 1860 is a per axis used to define the type of position detector (encoder) installed on each servo motor. Specifically, it tells the FANUC control whether the axis utilizes an Absolute Pulse Coder (APC) or an incremental feedback system. The Core Function: Bit 0 (APS) When setting up or re-establishing reference points on

If you are changing or verifying feedback settings, you will almost always need to look at this trio:

Under normal operation, the CNC updates this value automatically as the axis moves. This is typically addressed by checking that parameters

No parameter exists in isolation. 1860 works in concert with several others:

The absolute position has been successfully established and the machine "knows" where it is relative to the machine zero. Relationship with Parameter 1815 Parameter 1860 is frequently used in conjunction with Parameter 1815 , which manages the absolute pulse coder settings: 1815 bit 5 (APC): Specifies whether an absolute pulse coder is being used. 1815 bit 4 (APZ):