Fanuc Parameter 1860 [No Ads]

When a machine axis homes using a reference point return method (like G28), it looks for a physical deceleration switch and then shifts to the next "grid shift" pulse sent by the encoder. Parameter 1860 allows the operator or technician to electronically offset this final reference position without moving physical switches or mechanical components. Technical Specification Two-word (Long word)

If you change Parameter 1860, always verify the status of Parameter 1815 right next to it to ensure your zero points remain valid.

Instead, she rotated the C-axis motor shaft by hand—a tiny, precise, agonizing turn. She used a torque wrench set to 2.5 newton-meters, and a dial indicator on the tool holder. The needle moved 0.002 inches. She stopped.

| Control Series | Data Format | Minimum Unit | Typical Range (Linear) | |----------------|-------------|--------------|------------------------| | | Integer (mm/min) | 1 mm/min | 100 – 600 | | 16i/18i/21i | Integer | 1 mm/min | 200 – 800 | | 30i/31i/32i-B | Real (decimal) | 0.001 mm/min | 200.000 – 800.000 | | Power Motion i | Real (mm/min) | 0.001 mm/min | 100 – 1000 | fanuc parameter 1860

Defines the feedback resolution or the specific multiplier factor for the position detector stream. The Power-Up Logic

Under normal operation, the CNC updates this value automatically as the axis moves.

Keep a log of original 1860, date of change, and observed behavior. Copy parameters to a memory card before tuning. When a machine axis homes using a reference

: It typically holds a 32-bit (binary) value representing the machine coordinate position. Dependency : It works in conjunction with Parameter 1815 , specifically: 1815#4 (APZ) : Indicates if the absolute position has been established. 1815#5 (APC) : Indicates if an absolute pulse coder is being used. Common Use Cases & Maintenance Battery Replacement

Fanuc parameter is used within the servo parameters of Fanuc 16/18/21 (and later) controls, specifically relating to backlash compensation .

This is why user feedback like "New values will automatically be loaded into par 1860 and 1861" is so common. For the Two-Stage Backlash function, the workflow might be different, but for absolute positioning, this is the standard operating procedure. Instead, she rotated the C-axis motor shaft by

Directly editing Parameter 1860 is rare and usually only done during a full system restore or when swapping encoders. To make changes: How to Enable Parameter Write Enable (PWE) on a Fanuc CNC

These alarms warn you that the battery backing up the absolute encoder data in the servo amplifier is dying or completely dead.

Cycle time per part reduced by 2.1 seconds, and tool change faults dropped to zero.