Fanuc Parameter 1860 File

Mastering Motion: Understanding FANUC Parameter 1860

When working with FANUC CNC machines, few things are as frustrating as a machine that refuses to reach its commanded speed, or worse, throws an alarm during a rapid move. Often, the culprit isn't a mechanical failure or a broken servo motor—it's a parameter setting deep within the control.

Purpose: It allows the machine to "remember" where it is even after power is turned off, provided the encoder battery is healthy. fanuc parameter 1860

Parameter 1240: Sets the coordinates of the first reference position (G28) in the machine coordinate system. Parameter 1240 : Sets the coordinates of the

How to Adjust Parameter 1860

⚠️ WARNING: Always back up your machine parameters to a memory card or USB stick before making any changes. Incorrect parameter settings can cause the machine to behave unpredictably. For the CNC engineer, mastering Parameter 1860 means

For the CNC engineer, mastering Parameter 1860 means understanding not just the parameter itself, but the entire homing sequence: the rapid approach, the deceleration dog, the marker pulse detection, and the final grid position. When optimized, 1860 delivers a fast, rock-solid reference return that ensures every part starts from the exact same zero point.

| Phase | Speed Control | Parameter | Description | |-------|---------------|-----------|-------------| | 1. High-Speed Approach | Rapid traverse (G00) | 1420, 1421, 1422, 1423 | Axis moves toward the deceleration dog at rapid speed. | | 2. Low-Speed Search | Parameter 1860 | PRM 1860 | After hitting the dog, axis decelerates to this speed to find the 1-grid signal (encoder marker pulse). | | 3. Final Stop | N/A (control logic) | N/A | Axis stops at exact reference position (grid point). |