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TECHNICAL INFORMATION
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Visit this page often to take advantage of the technical information on servo motors and
feedback devices that will be posted here.
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Commutation
Commutation is the process the routes electrical current to the correct winding to produce
torque in both brush type and brushless motors. However in permanent magnet (PM) brushless
motors it's a whole new ball game. The brushes and commutator are replaced with feedback
devices and electronics in the drive. Correct feedback alignment is necessary for correct
commutation to occur.
While the concepts are new and the implementation can get complicated, the basic principles
are understandable. Most importantly, the procedures that you need to perform, as a servo motor
repair person or industrial maintenance person, are very much within reach if you have the right
modern tools for the job.
The documents below explain the principles behind electronics commutation and describe the
procedures required to correctly align feedback devices using the test equipment from
Mitchell Electronics, Inc. The PDF files may be read online or downloaded with your web
browser.
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Commutation Documents:
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Training
Motor repair shops, interested in incorporating servo motor repair into their business,
typically want to know how to get their technicians trained in this area of expertise.
Training is very import in getting started in servo motor repair. However, to stay on top of
the continually changing technology involved with servo motors, it is just as important for
servo motor repair shops to be committed to an ongoing training program.
Training alternatives vary from in-house training sessions, to training courses and seminars
by motor manufacturers, to training by independent concerns. The type of training which best
fits the needs of your company will depend on your particular situation, but here are
some things to consider.
The ability to provide in-house training will depend on the level of expertise available
in your company. If you have hired a technician with servo motor experience, make sure that
his or her experience includes the brands and types of motors that you plan to encounter
in your business.
If you go to manufacturers for training, their training will generally not include material
to help you repair their competitors' products. Many manufacturer's have little interest
in independent repair shops repairing their motors, so you will likely not receive training
from them.
Training by an independent training organization is likely to provide valuable information on the
widest range of brands and types of servo motors. The best training course we know of at this
time is provided by Quality Solutions, LLC in
Indianapolis, IN.
Take a look at the following Question and Answer document for at least an initial list of
training topics that you will want to consider: ServoRepairQ-A.pdf.
Then consider any special needs that your business may have, and decide which training best
suits your individual situation.
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