Increase 1860 in increments of and repeat until slight overshoot appears.
Under normal operation, the CNC updates this value automatically as the axis moves. fanuc parameter 1860
A Mori Seiki DuraVertical 5080 (Fanuc 31i-B5) was taking 1.8 seconds for each tool change orientation. Parameter 1860 was factory set at 950. Increase 1860 in increments of and repeat until
If Parameter 1860 is set too low, the machine accelerates violently. This puts immense stress on the ballscrews, thrust bearings, and servo motors. Over time, this leads to premature mechanical failure, reversed backlash, and accuracy issues. Parameter 1860 was factory set at 950
In CNC systems (specifically Series 16i, 18i, 21i, and 0i), Parameter 1860 is a critical, axis-specific value that stores the absolute position encoder data .
If the detected discrepancy exceeds the value set in Parameter 1860, the CNC triggers a 300-series APC alarm (typically Alarm 300: APC Alarm: Need ZRN). This prevents the machine from running with potentially incorrect coordinates, which could lead to crashes.
Parameter 1860 is closely linked with parameter (APC and APZ bits), which determines if an axis uses an absolute detector and if the zero position is established. Data Type: 2-word (long integer) axis parameter.
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