Parameter 1829 changes affect the core initialization of the digital servo software. You must completely power down the CNC control and the main breaker, wait 30 seconds, and turn it back on for the new matrix settings to take effect. Conclusion
In FANUC CNC systems, defines the Position Loop Gain Matrix (often associated with arbitrary axis positioning or precise multi-axis interpolation).
Use FANUC’s Servo Guide software tool to chart the position error loops if available. If the tracking error spikes suddenly during acceleration changes, look for mechanical binding or axis lubrication failures before tweaking the loop gains. Summary Reference Table Feature / Detail Specification / Action Function
[ Commanded Stop Position ] <====== Deviation Limit (Param 1829) ======> [ Actual Encoder Position ] | Exceeding this triggers SV0410 Servo Alarm Common triggers for this fault include: fanuc parameter 1829
Source: FANUC Series 0i/0i Mate - Model B Connection Manual
To help narrow down the solution for your specific machine, could you tell me you are using, the exact alarm code triggering on your screen, and whether this error happens during rapid traverses or regular cutting feeds ? Share public link
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This alarm is a protective measure. It indicates that the control system is telling the motor to move, but the motor is unable to keep up with the commanded speed or position. Without this alarm, if an axis encountered a heavy mechanical bind, the servo motor would continue to draw maximum current trying to force its way through, destroying gears, ballscrews, or the motor itself. Common Causes of Parameter 1829 Alarms
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: Complex 3D surfacing paths will deviate from the programmed CAD/CAM model. Settings Too High Parameter 1829 changes affect the core initialization of
Servo Alarm Detection Threshold (Excessive Error) System: FANUC Series 16i / 18i / 21i / 30i / 31i / 32i (and equivalent 0i models) Category: Servo Parameter (Axis-Specific)
FANUC Parameter 1829 serves a critical role in maintaining the safety and precision of CNC machine tools. By monitoring the position of each axis when it should be stationary, this parameter acts as the system’s "guardian" against unexpected movement that could damage tooling, workpieces, or the machine itself.
EXCESS ERROR (STOP)