The correct 1860 value for that motor, at that specific alignment, was .
In FANUC Series 30i, 31i, and 32i controls, parameter 1860 plays a vital role in managing rotary axis A-type operations with absolute position detectors.
When implementing two-stage backlash acceleration, several factors must be considered. These include the mechanical condition of the axis being compensated, the required machining tolerance, and the acceleration and deceleration characteristics of the servo system. Typically, smaller values produce faster initial acceleration but may cause mechanical shock, while larger values produce smoother but slower compensation.
This article draws information from the following technical resources: fanuc parameter 1860
Key in the required value dictated by your machine tool builder's documentation. Press the key. Turn the PWE setting back to 0 .
This parameter is a critical internal value that represents the absolute position of the axis relative to the reference point (home). When a machine is equipped with absolute encoders, it "remembers" its position even after being powered off. Parameter 1860 acts as the digital record of that specific physical location on the encoder's scale. Role in Absolute Homing
On some high-end multi-path machines, Parameter 1860 might be overwritten by a macro variable or a specialized FANUC synchronization screen (like the composite control or torque control screens). If your changes disappear after a power cycle, check if a custom macro program is forcing values into the system parameters upon startup. Conclusion The correct 1860 value for that motor, at
after completing your adjustments to lock the parameters and prevent unauthorized or accidental changes.
Understanding 1860 often requires checking related "Reference Position" and "Absolute Encoder" parameters:
This procedure, commonly shared in CNC forums like CNC Arena, illustrates how Parameter 1860 is involved in absolute positioning system initialization: These include the mechanical condition of the axis
Increase 1860 by 200-300 units incrementally while listening for mechanical compliance during a manual tool change.
Do not try to manually "tune" or "guess" the value of Parameter 1860 when setting up absolute encoders. Always follow the clearing and referencing procedure to let the system populate it correctly.
Parameter 1860 values are typically entered in (microns for metric systems, or ten-thousandths of an inch for imperial systems).