: Manual modification is rare and usually only done during advanced troubleshooting or when migrating parameters from a backup. cti-sumy.com.ua Are you currently troubleshooting a 300 APC Alarm (Ref Position Need Return) or have you recently replaced encoder batteries 64120EN 0i Parameter Manual.pdf
| Problem | Cause | |---------|-------| | or PS0031 | 1860 set too high → reference point signal missed due to overshoot | | Inconsistent reference position (drift every cycle) | Speed too high for deceleration zone length (dog/switch timing mismatch) | | Long cycle time | 1860 set unnecessarily low (e.g., 100 mm/min on a large VMC) | | Machine overshoots reference point | 1860 > rapid rate (not allowed; parameter clamped internally) | fanuc parameter 1860 full
Fanuc is a critical axis-specific setting used to store and manage the absolute position data for machines equipped with absolute pulse coders. It works in tandem with Parameter 1815 to ensure the CNC control "remembers" its exact physical location, even after power cycles, eliminating the need for manual zero-return (homing) operations every morning. Core Function and Purpose : Manual modification is rare and usually only
Parameter 1860 is mathematically linked to . Core Function and Purpose Parameter 1860 is mathematically
: If the absolute encoder batteries die or the encoder cable is disconnected, the relationship between the mechanical position and the encoder data is lost. Re-establishing the home position will result in a new value being written to Parameter 1860. Grid Shift Correlation Parameter 1850
The machine cuts perfect straight lines but oval arcs. This is often a mismatch between 1860 and the acceleration for the orthogonal axes. Ensure that the 1860 values for X and Y (or X and Z) are identical for circular moves. Uneven acceleration distorts circles into ellipses.