Disclaimer: Parameter numbers and behavior can vary slightly between FANUC control series (e.g., 0i-TD vs 31i-A). Always refer to the specific FANUC operator’s manual for your control model.
The parameter is systematically locked and calculated exclusively by the CNC.
amount while it's supposed to be stopped, shut the machine down for safety." fanuc parameter 1860 full
In high-precision machining, especially for older machines with mechanical wear, standard backlash compensation may not be enough for rapid traverse (G00) moves. Two-stage backlash acceleration modifies how the axis accelerates when reversing direction to reduce the impact of mechanical play.
Based on real-world field experience from CNCzone, the documented reset process that includes Parameter 1860 is as follows: Disclaimer: Parameter numbers and behavior can vary slightly
There are three primary reasons a machinist or service technician modifies Parameter 1860:
Parameter 1850 acts as an editable offset applied on top of the raw encoder data. When you change Parameter 1850: amount while it's supposed to be stopped, shut
| Parameter | Name | Purpose | | :--- | :--- | :--- | | | Grid Shift (Reference Position) | Shifts the grid point for all reference returns. Used for mechanical dog adjustment. | | 1851 | Grid Shift Fine | Fine adjustment (usually in 1/1000 mm or 1/100000 inch increments). | | 1860 | Reference Position Shift | Shifts the position the machine considers "Zero" after the reference return is complete. Often used with Absolute Pusle Coders. |
If Parameter 1860 is set to 0 , the machine does not apply a specific clamp speed during deceleration/acceleration transitions. This allows the machine to use the full time constant defined in other parameters, resulting in smoother motion but potentially longer cycle times.