Fanuc Parameter 1829 //free\\ Jun 2026

: While sometimes linked to parameter 1829 in troubleshooting discussions, this often relates to active movement limits, though 1829 is often checked simultaneously. Troubleshooting and Setting the Value

When a CNC axis is in motion, there is always a slight delay between the commanded position from the CNC and the actual physical position of the servo motor. This lag is known as or following error . Parameter 1829 sets the maximum allowable threshold for this error while the axis is actively moving.

If Parameter 1829 is set too low, the motor will lag behind its commanded position during the homing routine. If the lag exceeds the limit set in Parameter 1828 (Position Deviation Limit during movement), the CNC throws a servo alarm. 2. Axis Overshoot or Oscillating (Vibrating) fanuc parameter 1829

Press the key, then select the [SETTING] softkey.

Remember: Parameter 1829 does not fix mechanical problems. It only tells you when they exist. Use it wisely, and your FANUC-controlled machine will deliver years of reliable, alarm-free production. : While sometimes linked to parameter 1829 in

: Often set higher than Parameter 1826 (In-Position Width) to allow for minor settle time, but small enough to detect genuine mechanical issues. Troubleshooting "Excess Error Stop" (Alarm 410)

The theoretical following error during constant velocity is calculated as: Parameter 1829 sets the maximum allowable threshold for

This is the logical question every experienced machinist asks. The answer lies in FANUC’s real-time architecture:

The screen will display Parameter 1829 with columns for each axis (e.g., X, Y, Z). Step 4: Calculate and Input the Correct Value

When the positional deviation exceeds the value in 1829, the machine typically throws one of the following servo alarms :

If the diagnostic bits indicate an illegal loop gain or matrix calculation, you know with certainty that Parameters 1825, 1828, or 1829 are configured incorrectly. Best Practices for Changing FANUC Parameters