Select the headings from the left column below:

1. Motivation

2. Approach

3. Solution

4. Conclusion

Approach

Stepper Motor

The stepper motor is simply a gear turning with the help of heatuators. The sliding bar with the 2-teeth component is pulled by the left array of heatuators towards the left. This motion turns the gear counterclockwise, because the teeth of the gear and of the 2-teeth component are interlocked. After this, the top heatuators will pull the mounting block up and the left heatuators will relax and push the sliding bar back to the starting position. As the top heatuators relax, the mounting block will come down to its original position and gear turning motion can repeat again.

There is a second variation of this design. In the new design the sliding bar has one tooth instead of two teeth. Furthermore, the top heatuator array only consists of the left array section. The purpose of the second design is to fine-tune the function of the motor, in the attempt to make it smaller with less use of heatuators.

This design is an improvement of the previous design. We have changed a few design issues, for instance the previous design lacked dimples on the sliding bar and the mounting block. Furthermore, the two horizontal and parallel bars attached to the left heatuator array needed to be lengthened, to ensure a proper bending upwards as the intended motion progresses.

ENSC 494 Summer 2003 - George Kwei - Mirela Cunjalo - Gary Lu