Parameter 1860 Work — Fanuc

Guide: Fanuc Parameter 1860 (Feed per Revolution Override)

1. What is Parameter 1860?

Parameter 1860 controls the Feed per Revolution (FPR) Override limit.

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After replacing an absolute encoder battery or a motor, you must "zero" the machine. Setting the APZ bit (in Parameter 1815) often triggers an update to the value stored in 1860. Synchronizing Positions: Guide: Fanuc Parameter 1860 (Feed per Revolution Override)

• Set Parameter 1860 to 100.
• Result: Even if the operator turns the knob to 150%, the machine will feed at exactly 100% of the programmed rate.

I walked to the aisle. The crates were stacked high enough to block sightlines. My light revealed nothing but dust and labels. Then I noticed it: a child’s sticker tucked behind one crate, a faded cartoon robot with a missing eye. Not vandalism—accidental, the kind that happens when delivery hands pause and drop their coats. Under the sticker, the floor had a small gouge, like a shallow crescent scored by something sharp. The gouge led to a tiny, mottled smear—old oil, pressed dust, a little black hair. Set Parameter 1860 to 100

If your machine's zero point is slightly off (e.g., after a minor crash), you might adjust Parameter 1850 (Grid Shift).

Speed Stability: Provides the feedback needed for the control to compensate for load changes, keeping the cutting speed constant. ⚠️ Pro-Tips for Setting