The CNC system to Parameters 1860 through 1862. The control updates this field immediately when a user executes a successful absolute position calibration sequence or reference point return. Manual Override Warnings
High-impact collisions can slip the drive coupling or cause slight structural shifts that displace the axis reference position.
Changing servo parameters incorrectly can cause the machine to move unexpectedly, crash, or alarm out. Always back up parameters before making changes.
: The CNC uses the value in 1860 as the base for all other coordinate systems (Work Offsets G54-G59). If 1860 is incorrect, all machining positions will be shifted. en.industryarena.com Maintenance & Troubleshooting Series 16i/18i/21i/20i-A Maintenance Manual, GFZ-63005EN/02 fanuc parameter 1860 work
If your machine has the Two-Stage Backlash Acceleration option (often an option that must be purchased and enabled by the machine tool builder or FANUC), then Parameter 1860 will likely function as the first-stage acceleration value. You can confirm this by checking the relevant bit parameters:
If you are not using the backlash acceleration option, or if the feature is disabled, Parameter 1860 is very likely being used by the system to store the reference point value for an absolute encoder. In this case, you will usually not modify this parameter directly. Instead, you will set up your absolute encoder zero point using the procedure described below, and the control will write the values to Parameters 1860 and 1861 automatically .
Manual editing of Parameter 1860 via standard MDI inputs is . Forcing a manual change often triggers immediate machine power-cycle requirements. It can also result in unintended coordinate jumps, machine overtravel states, or physical turret crashes. ⚙️ Key Technical Dependencies The CNC system to Parameters 1860 through 1862
It synchronizes the mechanical rotation of the spindle with the electrical pulses sent to the CNC.
Before you can change any parameter, you must unlock the system. Press the hard key on your FANUC panel.
Bits are numbered from right to left, starting at Bit 0 (#0) up to Bit 7 (#7). Core Bit Functions Changing servo parameters incorrectly can cause the machine
By mastering Fanuc Parameter 1860, maintenance teams can substantially cut down troubleshooting times during motor changes and structural realignments, ensuring the CNC machine maintains repeatable, high-precision manufacturing output. To help you get this sorted out, let me know:
[Physical Absolute Encoder] ──> [Calculated Grid Offset] ──> [FANUC Parameter 1860] ──> [Machine Reference Coordinates (G53)] Automatic Updating