Fanuc Parameter 1829 Jun 2026

Fanuc uses two primary parameters to monitor positional error based on whether the machine is moving or stationary: Parameter 1828: Limits deviation while the axis is Parameter 1829: Limits deviation while the axis is Common Causes for 1829 Alarms

In Fanuc CNC systems, the servo motor constantly works to hold its position. Even when "stopped," external forces like gravity or mechanical tension can cause slight movement. Threshold: Parameter 1829 sets the tolerance for this movement. Protection: fanuc parameter 1829

As one experienced technician explains: "The CNC uses the position error specified in par 1828 when it is commanded to move. At the end of the block, the axis is no longer commanded to move, so it uses the error zone specified in par 1829. If it overshoots that zone, alarm 410 occurs". Fanuc uses two primary parameters to monitor positional