This was a teamwork with 2 other students. The goal was to design a mechanism with the elements of the existing Creatool box (figure 1). 

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We designed a system where one person stands on one part and another person sits on the other side. When the standing person push and pull back the other person goes up and down. Placing of the people can be seen on the third image. 

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To make sure our mechanism worked we needed to design four add ons:  a reach, a clamp, a band and an add on for the wheel. You can see the add ons in the pictures nr 6, 11, 12 and 13.

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We also needed to do calculations to make sure the construction is strong enough and how much strength the person need. The calculations can be seen in pictures nr 7, 8, 9 and 10.