| Method | When to Use | Risk Level | | :--- | :--- | :--- | | | After replacing a limit switch or deceleration dog. | Medium | | Reference Position Shift (1860) | After replacing absolute encoder or battery. | High | | Work Shift (G54-G59) | Daily part setup. No permanent machine change. | Low | | External Offset | Temporary tool length changes. | Low |
| Phase | Action | Speed Control | Parameter | |-------|--------|---------------|-----------| | | Move from current position to an intermediate point (specified in G28 block) | G00 rapid rate | Parameter 1420 (Rapid traverse) | | 2 | Move from intermediate point to the machine reference point | Lower speed for final approach & deceleration | Parameter 1860 | fanuc parameter 1860 full
Most machines will not run a 10 ms 1860 due to mechanical resonance. Multiply by 3–5x for safety (e.g., 40–60 ms). | Method | When to Use | Risk
Note: This procedure requires and is typically performed in MDI mode. On newer Fanuc controls (i Series, 30i, 31i, 32i, 0i-F), you may need to disable "Parameter 3290: Key 4" if parameters are locked. No permanent machine change
The reference position is established . The system knows exactly where the axis is located based on the absolute encoder data. 2. When Does Parameter 1860 Revert to 0?