Setting FANUC parameter 1860 requires a good understanding of the machine's mechanics, feedback devices, and the specific requirements of the application. Here are the general steps:
When you lose zero-return or absolute encoder synchronization, resetting the reference point is a common procedure that involves 1860 and 1861 . This is a delicate operation; any mistake could cause a crash.
What (e.g., 0i-MC, 0i-TD, 16i, 31i) are you working on?
: Establishes a manual baseline offset used to shifts the established reference point relative to the encoder grid. fanuc parameter 1860 work
We traced the code path together. Where the firmware kept backups, where a forgotten flag had turned a draft into a persistent parameter. She explained how, once, she had intentionally left a safety margin and tucked a note into the machine's logs. The decimal was her idiosyncratic marker. When production changed hardware and the controllers were updated, the ghost-setting resurfaced in odd places, interpreted by newer models as a condition to pause when encountering slight resistance. The machines were doing what they had been taught—learning to be careful because somebody had once insisted they be.
| Parameter Number | Data Type | Unit | Valid Range | | :--- | :--- | :--- | :--- | | | Word Integer (2-byte) | Percentage (%) | 0 – 100 (or higher depending on specific Fanuc Series/Option) |
Because the encoder's marker pulse may not line up perfectly with the physical zero point of the machine structure, software adjustments are required. Setting FANUC parameter 1860 requires a good understanding
| Parameter | Description | Type | | :--- | :--- | :--- | | | Reference point value for rotary axes OR first-stage backlash acceleration value. | Axis | | Parameter 1861 | Used in conjunction with 1860 for reference point management. | Axis | | Parameter 1815 | APC (Absolute Pulse Coder) and APZ (Zero Point) status bits. Crucial for home position procedures. | Bit Axis | | Parameter 1851 | Backlash compensation value for cutting feed. | Axis | | Parameter 1852 | Backlash compensation value for rapid traverse. | Axis |
Changing the grid shift effectively shifts how the control interprets the data in Parameter 1860, moving the machine's "Home" without moving the physical encoder marker. 💡 Pro-Tip: Safety First Before making any changes to the 1800-series parameters: Back up your parameters to a USB or CF card. Record the current values of 1815 and 1860 for all axes.
In the FANUC Series 30i, 31i, and 32i (as well as 16i, 18i, and 21i) CNC systems, (APZ) is a crucial bit-type parameter used to establish and indicate the Absolute Position for each axis when utilizing absolute pulse coders . Feature & Functionality What (e
The encoder generates a reference signal (a "one-rotation signal" or grid reference) every time the motor completes a full revolution.
If the motor rotates in the commanded direction but the encoder reports feedback pulses in the opposite direction, the CNC control perceives this as an error. Within milliseconds, the system will detect that the axis is moving away from its target instead of toward it, triggering a safety shutdown. How Parameter 1860 Works with Other Parameters
⚙️ How Parameter 1860 Works within the Homing Architecture
After rebooting, go back to the SETTING screen and change PARAMETER WRITE back to 0 . Best Practices and Safety Warnings