Factory default is almost always 0 . If you see a non-zero value, the machine builder or a previous technician set it.
: Detection unit (e.g., 0.001mm or 0.0001 inch depending on machine settings). Technical Role fanuc parameter 1860 full
A common confusion exists among Fanuc parameters. Here is the breakdown: Factory default is almost always 0
This article provides a full technical breakdown of Parameter 1860—its function, its relationship with other parameters, how to calculate it, common troubleshooting scenarios, and best practices for optimization. its relationship with other parameters
Be careful not to set a value larger than the (the distance between two encoder "grid" pulses). If the shift is too large, the machine might skip a grid and home to the wrong position entirely.