April 2014
Intermediate to advanced
660 pages
14h 2m
English
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Project 7.20—Stepper Motor Control Projects—Complex Control Of A Unipolar Motor
In this project, a unipolar stepper motor is controlled in the following order:
• Turn 200 revolutions clockwise,
• Wait 5 s,
• Turn 50 revolutions anticlockwise,
• Wait 3 s,
• Turn 100 revolutions clockwise,
• Wait 1 s,
• Stop.
Project Hardware
The circuit diagram of the project is shown in Figure 7.165. In this project, a UCN5804B type stepper motor controller chip is used. This chip can drive small unipolar stepper motors up to +35 V and 1.25 A. The chip is connected to the microcontroller via its Step (pin 11) and Direction (pin 14) pins. The chip also has half-step (pin 10) and phase (pin 9) selection inputs. Depending upon the connection of pins 9 and 10, the chip can ...
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