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Browse Prior Art Database

Testing Of Stepper Motor Driver Electronics

IP.com Disclosure Number: IPCOM000048632D
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Ackerman, LL: AUTHOR [+2]

Abstract

To minimize service cost, a service representative must quickly determine whether a machine failure is caused by an electronic or mechanical malfunction. A simple test method is outlined which will make this determination for the service representative. The test does not add to the base machine cost nor does it degrade machine reliability.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 53% of the total text.

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Testing Of Stepper Motor Driver Electronics

To minimize service cost, a service representative must quickly determine whether a machine failure is caused by an electronic or mechanical malfunction. A simple test method is outlined which will make this determination for the service representative. The test does not add to the base machine cost nor does it degrade machine reliability.

In order to monitor the performance of components in an electronic system, additional circuitry is generally required. Invariably, the introduction of dedicated test circuitry translates to increased product cost and an overall reduction in the reliability of the system's performance. THe method presented below describes a process whereby an electronic system may test itself via a small amount of software, and a determination of its operating condition may be made without resorting to additional test circuitry.

Stepper-Motor Driver Electronics conventionally comprises a microprocessor, motor driver circuit, motor. and the power and signal lines which connect these units together. In general, the microprocessor can check itself and its interfacing. Inappropriate responses are detectable and an error condition can be posted for the service representative. Disclosed is a test method for the Driver Electronics,

It has been shown that a stepper motor can produce sounds when excited at an audible frequency. This may be achieved when two conditions are satisfied:
(a) when a specific motor driver circuit configuration is used, and (b) when all units within the Stepper Motor Driver Electronics are working properly. If either of the conditions is not satisfied, the magnitude of the sound will be reduced, or no sound at all will be produced.

Each of the three phases of the stepper motor are excited, one at a time. A great difference in the magnitude of the sound between any of the three-phases indicates an electronic problem. This immediately tells the service representative to concentrate on the electrical system as opposed...