Allen-Bradley Servo Motor Repair
Each Allen-Bradley servo motor that enters Servotech is subjected to an in-depth evaluation to determine the cause of your servo motor failure. We take measures to make sure we will be able to overhaul your Allen-Bradley servo motor from its broken and poor condition back up to the factory standard. Our finished products have the reliability and function of new motors.
To become an effective Allen-Bradley servo motor repair facility we have established a good working relationship Sick Stegmann, the manufacturer of encoders that appear on a majority of Allen-Bradley models, particularly the MPL series. By themselves the encoders are useless on the motors, which is why we have developed the means to reprogram Stegmann encoders. Additionally, Servotech has stockpiled factory information that gets programmed into the encoders specific to each motor type. Without this information, Allen-Bradley motors cannot be run on their own drives. Our ability to obtain encoders, and reprogram them with the proper information allows us to insure your motor will perform to its factory specifications in your machine.
Our goal is to give you the option of Allen-Bradley servo motor repair that has been refurbished back to like new condition, rather than being forced into buying new. Our repair procedure follows these steps:
1. Evaluation of Your Allen Bradley Servo Motor.
All electrical and mechanical parts are inspected on all Allen-Bradley servo motors. During our evaluation, we check for:
- Encoder mechanical condition, and integrity of the pre-programmed data fields
- Check bearing fits
- Housing fits
- Worn output shafts
- Corroded and/or broken flanges
A typical Allen-Bradley when it arrives in the shop, and then after we service it.
We re-manufacture or repair faulty conditions uncovered during our evaluation. Any part that does not meet the factory specifications receives attention including some of the following:
- Reprogram Stegmann encoders, replace with new Stegmann encoder.
- Re-manufacture a new Allen-Bradley servo motor front flange using the old flange and factory dimensions.
- Repair all the windings. Both AC and DC servo motors windings are washed, baked and tested.
- Replace faulty connectors with standard Allen-Bradley connectors.
- Remagnetize tachometer field frames on DC motors.
- Remagnetize and reband magnetic rotors on AC motors.
Stegmann encoders and Allen-Bradley connectors in stock at Servotech. The right components, readily available.
3. Preliminary Testing
During the assembly process each Allen-Bradley servo motor repair will be meggered at many different points. Some of our tests include:
- Test to confirm there are no grounded electrical parts in the servo motor (megger test).
- All AC stators are surge tested to at least 1500 volts (testing the potting material of the stators).
- After the baking process DC servo motor armatures go through a bar to bar test. This test will show if there are any shorts or opens in the winding.
- Align the feedback with the Ultraware 3000 Allen-Bradley drive.
Servotech uses software from Stegmann to reprogram new encoders that will function properly when they are run on one of our factory drives.
4. Servo Motor Assembly
After repair and preliminary testing, Allen-Bradley motors are reassembled. Our assembly process often improves the internal motor components. Our assembled motors utilize:
- Sealed bearings-high quality – sealed bearings are the better choice for any servo application because of the possibility of contamination. The sealed bearing has a line of defense against dirt and contamination getting into the race of the bearings and causing failure. With the added protection of the seal we can be sure that your motor will not only run correctly, but longer than a standard shielded bearing.
- Double lip seals in the front flange – these seals keep coolant from getting to the bearing.
- All new seals, O-rings, gaskets and connectors – ensure that your Allen-Bradley Servo Motor is protected from liquid contamination.
- Two-part epoxy coating for an added protection – the same coating used on Navy submarines.
Name Plating is restored on all work, complete with traceable job numbers and original data.
5. Final Testing on AB Servo Factory Drives
No Allen-Bradley servo motor leaves Servotech without being run on Allen-Bradley drive just like the one in your machine. Our collection of drives is frequently expanded in order to remain up to date on manufacturer changes in technology.
By using a factory drive we make sure that the servo motor is tested to full electrical capacity, and that the previous repair steps were executed successfully.
6. Name Plating
Before shipping, Servotech makes all new name plates for each of our servomotor repairs. These new name plates include all the original data from the motor, as well as Servotech’s name, job number, and date codes. This gives customers traceability in regards to their servo motor repair.