A properly tuned Parameter 1860 reduces the orientation completion time. A 0.1-second reduction per tool change, across 10,000 tool changes per month, saves nearly 17 minutes of non-cutting time – directly improving ROI.
Parameter 1860 doesn't work in isolation. It's part of a coordinated system of parameters that define how an axis moves and references. The most important interaction is with , which, together with 1860, comprises a 32-bit or 64-bit value representing the reference point. The combination of these two parameters is also "renewed so that following up at power on is within one rotation" for rotary axes. fanuc parameter 1860
: Navigate to the OFFSET / SETTING function screen, open the SETTING (HANDY) page, and change PARAMETER WRITE (PWE) from 0 to 1 . Ignore the 100 ALARM that safely warns you that editing is open. A properly tuned Parameter 1860 reduces the orientation
: If the 3V or 6V backup batteries on the servo amplifier die while the CNC is powered off, the absolute encoder loses its multi-turn memory. When power is restored, the machine generates a 300 APC Alarm: Need ZRN (Zero Return Required). Re-establishing the home position recalculates and rewrites Parameter 1860. It's part of a coordinated system of parameters
Disclaimer: This guide provides general information about FANUC parameter 1860 based on available documentation and industry knowledge. Always refer to the official FANUC parameter manual for your specific control model before making any parameter changes. Incorrect parameter settings can cause machine damage or personal injury.
Fanuc Parameter 1860 may appear as just another number in a sea of thousands. But as we have seen, this unassuming integer is the difference between a tool change that sings and one that stumbles. From the physics of gain to the practicalities of field tuning, understanding 1860 empowers you to reduce cycle times, eliminate alarms, and protect your spindle amplifier from unnecessary stress.
The manual said the value should be 12,000 for this machine’s gear ratio. But the machine had been running fine before lunch. No one changed 1860.