Fanuc Parameter 1860 Full Work -

Fanuc Parameter 1860 stores the absolute encoder pulse count for each axis, which is crucial for resolving 300 APC alarms caused by lost positional data, often due to dead batteries. Fixing the alarm involves replacing the batteries, setting Parameter 1815 (bit 4) to 1, and re-establishing the physical home position to automatically update Parameter 1860. For detailed instructions, you can read the Practical Machinist discussion and CNCmakers technical support . CNC Fanuc Resetting home position After switching batteries

Because this parameter holds the machine's "memory" of where it is, it is central to two major maintenance tasks: Establishing Reference Points

[ \textParameter 1860 = \frac\textReference pulses per motor rev\textFrequency divider (Parameter 1820) ] fanuc parameter 1860 full

Below are typical values for Parameter 1860 based on common machine configurations.

Defines the amount of backlash acceleration needed to reverse the torque 2. Technical Explanation: How It Works Fanuc Parameter 1860 stores the absolute encoder pulse

Tuning this parameter requires a testing process to ensure the backlash compensation is optimized for your machine's specific friction characteristics. Procedure for Testing:

The value entered into Parameter 1860 is measured in the system’s minimum detection units, which depend on your machine's feedback loop setup (increments of the encoder). CNC Fanuc Resetting home position After switching batteries

Parameter 1860 monitors this lag strictly during G00 rapid movements. If the physical axis falls behind the commanded position by a value greater than the amount stored in Parameter 1860, the CNC system immediately halts operation. It drops the ready signals, cuts power to the servo amplifiers, engages the mechanical brakes, and displays a on the CRT or LCD screen. Parameter 1860 vs. Parameter 1828

Based on real-world field experience from CNCzone, the documented reset process that includes Parameter 1860 is as follows: