Welcome to Webb-Elec’s dedicated specialist department for servo motor repairs.
High Quality Service – Reduced Downtime – Increased Productivity
At Webb-Elec we understand how costly downtime can be, that is why our goal is to provide you with a rapid, high quality repair service for all your servo motor requirements. Our aim is to have your servo motor back into production as quickly as possible, minimising disruption to your manufacturing processes in order to maintain your productivity levels.
Servo motors are highly specialised and precise electric motors, your repairer therefore needs a very specialised skillset and array of equipment to carry out servo motor repairs. They allow you to control not only the speed of the motor shaft, but also the acceleration and exact position of the rotor. Servo motors are always used in conjunction with a servo drive or amplifier and are fitted with a feedback device which communicates with the drive. Depending on the type of motor and feedback device fitted, the drive will know the exact speed and position of the rotor to enable the motor to carry out dynamically demanding operations repeatedly without any error.
Due to these characteristics, servo motors are well suited to and used in a variety of automation operations such as industrial robots and packaging machines. With advances in technology and manufacturing processes, servo motors are becoming more and more commonplace on machinery throughout every industrial sector.
At Webb-Elec we have invested heavily in our servo motor repair department with the latest industry leading equipment and engineering talent. We can repair all types of servo motors, including AC synchronous, AC asynchronous and DC servo motors.
Servo motors are fitted with a wide range of different feedback devices & a thorough understanding of how the motors and their feedback devices work is critical to providing an effective repair service. These feedback devices include simple hall effect sensors, resolvers, incremental and absolute encoders, serial data encoders with or without on-board memory & tachogenerators.
Webb-Elec Servo Motor Repairs
When contacting Webb-Elec, your servo motor will not wait for several days to be assessed. We pride ourselves on quality of service and will inspect your motor within a few hours of receiving it. Our standard service includes the following procedures:-
- Inspect and diagnose servo motor to identify any electronic issues and to check the integrity & positional data of the feedback device, recording any memory data.
- Dismantle the motor and carry out a Baker & surge test to the stator windings to check for any winding faults and that the insulation is suitable for service, not only to earth but between each individual turn of the windings.
- Rewind the stator windings if these have failed.
- Machine & rebuild any bearing journals or housings that are worn.
- Machine & rebuild worn shaft and keyway.
- Dynamically balance the rotor.
- Supply & fit replacement bearings & seals.
- Repair and rebuild brake assembly where fitted. Brake coil rewind and friction plate re-lined as required.
- Fully test brake for correct holding & breakaway torque.
- Refit & fully align feedback device. New feedback fitted and programmed if original has failed.
- Set up servo motor and carry out full commutation and alignment check followed by an extensive run test to ensure correct operation.
- Paint motor and deliver back to customer.
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Webb-Elec’s servo motor repair team can repair the damage caused by all of these faults and place your motor back into perfect working condition. We can also advise on best practice for maintenance scheduling and motor management to maximise the life of your servo systems.
Typical Servo Motor Operating Problems & Reasons for These:
Servo motors are a high precision piece of equipment and can suffer failure and operating problems the same as any other motor. Typical problems that we see servo motors suffering from include:-
- Bearing problems
- Worn housings/journals
- Excessive vibration
- Motor and/or brake winding failure
- Shaft and keyway wear
- Connection plug damage
- Low/poor winding insulation reading
- Feedback alignment faults
- Encoder memory faults
- Resolver failure
Reasons why your Servo may be suffering:
- Internal contamination from oil, grease or fluid
- Motor overload
- Low output from resolver
- Worn brake with incorrect air gap
- Encoder or resolver misalignment
- Worn or loose coupling
- Poor earthing
- Rotor imbalance
- Encoder memory faults
- Failed encoder or resolver