A06B-6066-H006 - Servo Amplifier - FANUC

The digital AC servo consists of the following.
The position command data from the NC machining program, for example, is processed by the NC controller, which turns it into position command data for each axis. The position command data of each axis is transmitted to a high-performance microprocessor mounted within the NC controller.

In this microprocessor, the position, velocity and current are all controlled on the basis of this data, and it outputs a PWM control signal.

The PWM control signal is fed to a separate servo amplifier, which amplifies this PWM control signal to the required power level for the AC servo motor.
The motor driving current from the servo amplifier, and the motor position data and velocity data passes from the pulse coder, are both fed back to the NC controller.

During parameter setting, an alarm may request that the power be turned off, however, continue setting without turning off power until all parameters are set.
When setting the parameters, keep the system in the emergency stop state. In the excitation state, setting values on the menu can be updated, but the internal data cannot be updated; the parameters are not actually updated.

Before setting a closed loop system (using a separate position detector), the user should check the operation of the machine in a semi-closed loop system (using the pulse coder on the motor).