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| When two wheels are attached to an axle the movement is smooth and even. |  | |
When two cams are used instead of wheels, the movement of the axle is jumpy and uneven. |  |  |  | |
By setting two cams at different angles on an axle, different types of movement can be created. | | |
Cams with different shapes will cause different types of movement. | 
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Now you have completed Lesson 5
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