Knowing how to repair servo motor like Yaskawa, repair Fanuc or any other brand of servo in the USA proves to be an advantage but itâ??s not easy. You must first know the nitty-gritty of a servo drive such as Parker as it serves the backbone of a servo motor, and how to perform a servo drive repair in case one breaks down.

Knowledge in servo motors is not a trivial matter but the basic if you plan to start a business that concerns repair of modification of servo motors and drives. Stepper motors and servo motors have some similarities but many differences, too. Troubleshooting these two staples of industrial machinery is not that complex if you already have basic understanding of electricity and the skill in using a multi-meter. Familiarizing yourself with motors, how they are operated and ability to identify each design is an added advantage in this field of work.

Ensuring proper lockout, tag-out and verification that the machine is energy-free should be done before troubleshooting industrial equipment. The individual doing the project should be held responsible in ensuring his own safety and the safety of those that are in the area of the machinery.

We need to remember that the motor is just one part of a motion control system. Once you have verified that the rest of the system is functioning normally, you can then proceed with determining whether the motor failed using a few simple tests. These tests can be performed using a standard multi-meter or a Megohmmeter.

First disconnect and label the motor cable at the motor junction box. You can check each wire on the motor for continuity to the ground using a standard ohmmeter. Each wire should have an infinite reading or at least 100,000 ohms at a minimum, anything that goes below that reading or a direct short to ground is also equivalent to a failed winding. Make sure you have a good clean connection on both the motor wire and ground lug or motor case. Repeat this test using a megohmmeter to attain an accurate reading.

Motors that contain brushes can be visually checked and the commutators should be cleaned as regularly as possible. As for the brush dust on your motor, you can carefully get rid of this using compressed air. This may even help alleviate a resistance reading to the ground during the short test.

As a conclusion, the basics of servo motors and stepper motors are more the same as the standard motors. Testing is also similar yet the name servo or stepper can sometimes intimidate even a seasoned electrician or maintenance technician.

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