Electro Electronics Repairs Repair and Rewind Servo Motors
A servo motor is a self-contained electrical device, that rotate parts of a machine with high efficiency and with great precision.
We offer Servo Motor Repairs. The output shaft of this motor can be moved to a particular angle, position, and velocity that a regular motor does not have.
The Servo Motor utilizes a regular motor and couples it with a sensor for positional feedback.
The controller is the most important part of the Servo Motor designed and used specifically for this purpose.
The servo motor is a closed-loop mechanism that incorporates positional feedback to control the rotational or linear speed and position.
Electro Repairs offer the following Servo Motor Services:
- Full services to the motors
- Encoder re-aligning
- Re-programming of encoders
- Encoder replacements
- Full encoder and resolver function testing
- Copying and saving encoder memory
The motor is controlled with an electric signal, either analog or digital, which determines the amount of movement which represents the final command position for the shaft.
A type of encoder serves as a sensor providing speed and position feedback. This circuitry is built right inside the motor housing which usually is fitted with a gear system.
The length of the pulse decides the voltage applied at the error amplifier as the desired voltage to produce the desired speed or position.
For digital control, a PLC or other motion controller is used for generating the pulses in terms of duty cycles to produce more accurate control.
The working principles of AC servo motors are based on the construction of two distinct types of AC servo motors, they are synchronous and asynchronous (induction).
The synchronous AC servo motor consists of a stator and rotor. The stator consists of a cylindrical frame and stator core.
The armature coil is wound around the stator core and the coil is connected to a lead wire through which current is provided to the motor.
The rotor consists of a permanent magnet, and this differs from the asynchronous induction type rotor in that the current in the rotor is induced by electromagnetism therefore these types are called brushless servo motors.
With this permanent magnet rotor, no rotor current is required so when the stator field de-energizes and stops, the rotor also stops. These motors have higher efficiency due to the absence of rotor current.
When the position of the rotor with respect to the stator is required, an encoder is placed on the rotor and provides feedback to the servo motor controller.