Fanuc Pivot Axis Control



The Pivot Axis Control function allows to control a pivot axis (B-axis) by a ball screw connected to a servo motor, which direction is free.
Generally, the relation between the rotating angle of motor and the position of rotation axis on the machine is proportional. When using this function, the rotation angle of the motor is not proportional to the rotation angle of the pivot axis (B-axis) on the machine.
The position command is output to drive the servo motor, and the position encoder is mounted to follow the rotation angle of pivot axis (B-axis). The speed of pivot axis (B-axis) may fluctuate; to decrease the fluctuation and keep the actual position gain constant, the function changes the position gain of the motor according to the position of pivot axis (B-axis).


  • Simple and effective implementation of complex pivotal systems
  • Increase machine efficiency and productivity
  • Simplified programming of the machining cycles
  • Speeds up CNC and machine commissioning

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