Servo Motor Feedback Devices
Feedback devices are the electronic controls that determine the movement of a servo motor, it is the feedback device that sets a servo motor apart from a standard DC or AC motor. These feedback devices are highly complex and as a result there are few companies with the capability and experience to perform a successful servo motor feedback repair.
ServoLab have experience of repairing all makes and models of servo motor feedback devices. The feedback configuration, also known as the commutation set up, determines if a repair will be successful when returned to service. Our experience in servo motor repair coupled with our commitment to quality and excellent relationships with the OEMS makes Servolab a leader providing reliable servo motor repairs and quality workmanship.
Feedback devices are the brains of the servo motor, these units are usually mounted to the rear of the motor and control the operation of the servo motor when in use. The servo feedback device processes the signals from the SERVO DRIVE and tells the servo motor to start, stop or hold position.
A current resolver feedback utilises the variation in the sinusoidal waveform to measure the rotation of the servo motor. Servo motors using current resolvers are often older models as this technology was first developed for military applications some time ago. A resolver feedback generates AC current, the strength of which is used to indicate speed and position of the motor, this technology has been around for many years and is very common in servo motor applications.
Digital Servo Motor
Optical Servo Motor
Optical feedback devices provide accurate control utilising a light beam and sensor (photodiode) which facilitates control of the servo motor using an aperture through which the beam of light passes, hitting the sensor. The frequency and number of times the sensor picks up the light signal provides the data required to calculate the speed, and therefore the position of the servo.
Servo Motor Tacho
The commutation set up, or feedback device set up, determines the quality and success of every servo motor repair. If you know how to correctly repair a servo motor feedback device you are able to complete effective and reliable servo motor repairs.
ServoLab are in regular contact with feedback device OEMs and have supply agreements with many encoder manufacturers, this excellent relationship with a number of key suppliers gives ServoLab access to components which competitors do not have.
Our history of providing successful servo motor repair and the quality of our workmanship means some of the world’s largest companies trust ServoLab to deliver servo motor repairs throughout the UK and Europe.