Introduction.

The basics of an oscillating fan is that it converts the rotary rotation of the fan into a oscillating motion so that the side to side motion of the fan head can be obtained. 

Because of the gear ratios, the RPM of the fan is reduced and this output will drive the 4 bar mechanism, the short length being fixed.

The reduced motion output acts at the input for a double rocker 4 bar mechanism which allows the fan head to oscillate side to side. 

To conduct the kinematic analysis measurements and estimates need to be made. These include:

1. The RPM estimate for the fan at high and low setting,
2. The measurement of the number of teeth on gears for the gear reducers,
3. The pitch of the worm gear,
4. The lengths of the four bar mechanism.

Once these measurements have been taken, MATLAB code was used to conduct kinematic analysis. A copy of the code has been included in the next section for reference.