Fanuc Parameter 1860 Full [hot] Jun 2026

If the machine tool coordinate exceeds the value set in , the CNC rounds the value using the logic specified. APZ in 1815: Must be 1 for absolute positioning.

Older controls (Fanuc 6, 10, 11, 12, 15) use different parameter numbering. For example, on Fanuc 15, the reference shift might be Parameter 700+ (axis-specific). Check your yellow Fanuc manual.

On vertical (Z) axes, the brake might be slipping or the counterbalance (if equipped) might be failing, causing the axis to drop slightly when the motor stops.

Type 1860 using the alphanumeric keypad, then press the (Number Search) softkey.

2. Full-Closed Loop Systems (Linear Scales / External Encoders) fanuc parameter 1860 full

In the world of Fanuc CNC controls, parameters are the silent architects of machine performance. They dictate everything from axis travel limits to servo response. Among the hundreds of critical parameters, stands out as one of the most influential for machine dynamics, surface finish, and cycle time.

In essence, Parameter 1860 is the machine’s internal "truth"—a raw digital heartbeat that tells the system exactly where it is in the physical world, long before those numbers are translated into the user-friendly coordinates we see on the screen.

Detection Units (not millimeters or inches directly) Understanding Detection Units

Use a precision indicator to measure the "blip" at the 90°, 180°, 270°, and 360° points. Adjust Parameter 1860: If the machine tool coordinate exceeds the value

Absolutely not. The machine must be in Emergency Stop or at a complete stop with no axis motion.

This appears if you enter a value outside the allowable range for your axis configuration. Check your machine's specific Fanuc manual.

If you find a non-zero value in 1860, record it before making any changes. When possible, photograph the parameter page.

If your machine is constantly tripping a alarm during rapid movements, Parameter 1860 is flagging a genuine system failure. While you can temporarily increase the value in Parameter 1860 to diagnose the issue, the root cause is rarely the parameter itself. Look for these common mechanical and electrical issues: 1. Mechanical Binding or Heavy Friction For example, on Fanuc 15, the reference shift

After changing, turn the parameter write off ( PARAMETER WRITE=0 ). completely to apply the changes. 4. Parameter 1860 and Absolute Pulse Coders (APC)

If Parameter 1860 is set incorrectly (e.g., after a servo swap or battery backup loss), the following issues will occur:

When a machine performs a zero-return (G28) using a reference mechanical grid, Parameter 1860 dictates the size of the "grid" window. Incorrect values can cause the machine to shift its zero point by exactly one motor revolution.

is a critical axis-specific setting used to store and display the current position data of an absolute position detector (encoder). Parameter Definition Parameter Number : Absolute position detector current position data. : 4-word (integer).

Technicians often confuse 1860 with other parameters. Here is a clear comparison: