Fanuc Parameter 1860 Full [patched]

For most standard CNC lathes and mills using Ball Screws and Flexible Couplings (direct drive or near 1:1 gear ratio):

The standard formula for setting 1860 is derived from the basic servo calculation: fanuc parameter 1860 full

| Feature | Detail | |---------|--------| | | 1860 (axis 1), 1861 (axis 2), … | | Purpose | Final approach speed for G28 reference return | | Units | mm/min (metric) or 0.1 inch/min (inch) | | Typical range | 500 – 6000 mm/min | | Key constraint | Must be ≤ parameter 1420 (Rapid) | | Failure mode if too high | Missed reference signal → alarm or position drift | | Failure mode if too low | Long cycle time, but safe | For most standard CNC lathes and mills using

The relationship between time constant (T) and acceleration (a) is: 1861 (axis 2)

bits), which tells the system that an absolute pulse coder is being used and whether the reference position has been established. Coordinate Synchronization