If you replace a motor, you should first clear and reset the home position using to get the machine roughly into place. Afterward, run a test piece or check a reference gauge, and use Parameter 1860 to dial in the final accuracy down to the micron. Important Safety Tips When Working with Grid Shifts
The axis moves rapidly in one direction immediately after releasing the emergency stop or trying to jog the machine.
: Technicians determine the difference between the desired physical home position and the current absolute position reading. This difference is converted into "detection units" (pulses) and entered into 1860. Synchronization
When Parameter 1860 is misconfigured—often after a motor replacement, a retrofit, or a backup restoration error—the machine will display distinct warning signs: fanuc parameter 1860 work
To help narrow down any issues, could you tell me your machine is throwing? If you can also share if you recently replaced any parts like a motor or encoder, or what FANUC control series you are using, I can give you more exact troubleshooting steps. Share public link
View the current value in . Let's assume the current value is 2500 .
Fanuc Parameter 1860 is used for setting the . It works closely with absolute encoders to define the absolute reference position (machine zero) of an axis. If you replace a motor, you should first
: In an incremental setup, the machine hunts for a physical deceleration switch, drops its speed, and then registers the very next zero-marker pulse (grid) from the encoder. Parameter 1850 is applied here to shift the reference point relative to that marker pulse.
To understand the job of Parameter 1860, it helps to look at how modern FANUC systems keep track of where components are located. On older machines using incremental encoders, axes had to travel until they tripped a physical deceleration limit switch (or dog) and found the encoder's single null mark to find home.
Controls whether the system treats the axis as absolute ( APC ) and verifies if home has been successfully established ( APZ ). Grid Shift : Technicians determine the difference between the desired
: Most machines use "Automatic Setting" (set via Parameter 1902), where the system detects the amplifiers in order. The Role of 1860
I can provide the exact parameter adjustment steps for your specific machine setup. Share public link
Jogging the axis to the physical home position (often marked on the machine). Setting back to 1 .