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... The direction of each motor (stepper and DC) was studied. The DC and stepper motor were connected to the digital output of the data acquisition board. A feedback potentiometer was connected to each of the motor shafts, which gives an increasing or decreasing feedback voltage depending upon the direction of rotation of the motors.
A proportional position feedback controller for the stepper motor was developed. ... The plant (the system controlled) is a stepper motor which has a rotary dial mounted on its shaft. ... For continuous rotation of the motor shaft in one direction, the feedback potentiometer outputted a gradually increasing voltage. It generated a gradually decreasing voltage for the motor rotating in the opposite direction. ... The motor system was, also, connected to a second ten-turn rotary potentiometer that can be turned by hand. This hand held potentiometer was used to input the set point for positioning the stepper motor system. ...
For the motor controllers, a LabVIEW program was written to position the stepper motor system as specified by the set point. ... If the difference was larger than the dead band, the program drove the stepper motor in the appropriate direction to reduce the magnitude of the error. ... It, also, checked for error so the motor stopped once the error was within the dead band.
Approximate Word count = 1009
Approximate Pages = 4
(250 words per page double spaced)
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