Over-tightened gib adjustments physically restrict axis movement.
Worn ball screw bearings or a damaged nut assembly increases torque requirements, causing the axis to lag behind its commanded position. 2. Servo Amp or Motor Issues
: If mechanical issues like a physical bind, chip buildup, or poor lubrication cause the axis to drift away from its "home," the difference between where the CNC thinks it is and where it actually is grows .
You must have password/access level to FANUC’s parameter writing enable. Typically, this requires setting PWE (Parameter Write Enable) to "1" or having a maintenance key. fanuc parameter 1829
Confirm that the alarm is indeed SV0410, SV008, or a similarly worded excess error alarm. Note the specific axis (1st, 2nd, 3rd, etc.) indicated.
Lack of oil on box ways or linear guides increases friction, making it harder for the servo motor to maintain speed.
If the 1829 alarm happens just as the machine stops, the acceleration/deceleration time constant might be too short (too abrupt). Servo Amp or Motor Issues : If mechanical
Last updated: October 2025 – Applicable to FANUC Series 0i-F Plus and 30i-B Series controls.
Following Error (in mm) = Feedrate (mm/sec) / Loop Gain (Parameter 1825)
: When this threshold is breached, the NC typically initiates an emergency stop and disables the drives to prevent potential machine damage or injury. Common Causes for Parameter 1829 Alarms Confirm that the alarm is indeed SV0410, SV008,
It is designed to protect your machine. Increasing it too high can prevent the system from flagging a genuine failure (e.g., a dragging brake).
Before attempting any parameter modifications, it is essential to follow proper safety protocols and understand the implications of your changes.
If the mechanics are smooth, the electrical drive system might be struggling to control the motor.