Fanuc Parameter 1829 May 2026

Note: Fanuc parameter numbering and names vary across control series (e.g., Series 0i/11/15/16/18/21/30i/31i/32i/Alpha i, etc.) and by software version. Parameter 1829 on one model may have a different function or not exist on another.

The value for Parameter 1829 is generally set based on the maximum mechanical drift or servo hunting expected during a stop. FANUC recommends the following formula:

$$ \textParameter 1829 = \frac\textMaximum Allowable Drift\textDetection Unit $$ fanuc parameter 1829

Typical Values (Example for a standard milling machine):

Imagine commanding the X-axis to move 100 mm at 10,000 mm/min. The servo drive sends power to the motor. The motor’s encoder reports back every few milliseconds. Ideally, the difference between "where it should be" and "where it is" (called the following error) remains small—typically a few microns. Note: Fanuc parameter numbering and names vary across

However, consider these scenarios:

In these cases, the actual position lags far behind the command. Once the error exceeds Parameter 1829’s threshold, the CNC fires a SV0410 alarm and disables the servo drives. This is a safety feature, not a bug. The value for Parameter 1829 is generally set

The most common symptom of Parameter 1829 being triggered is Servo Alarm 410.

| Parameter | Function | |-----------|----------| | 1320 | Negative software limit (first stage) | | 1321 | Positive software limit (first stage) | | 1828 | Positive software limit 1 (auxiliary) | | 1829 | Positive software limit 2 (auxiliary) |