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Hands up dummy 2

Input: orange cam driven by a motor (in blue).

Thanks to double scissor mechanism (in pink and yellow) stroke length of green arms is very large, 20 times of the one of the cam follower (in red).

Gravity maintains cam and roller contact.

The dummy is used in basketball training, made on request from a Youtuber.

For more details of double scissor mechanism see:

Double scissor mechanism

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