Content Comparison

The main mechanism consists of the crank and the two links inside the base and the bear's body. This mechanism drives the arm and the head movement.

We can consider the mechanism to be divided in into two parts:

-The crank and first link within the base.

...

The height and offset of the top slot remains constant so we can find the length of d with simple trigonometry. 

\begin{equation}
d_x = g - b_2\cos\theta_{32}
\end{equation}


\begin{equation}
d_y = f - b_2\sin\theta_{32}
\end{equation}


\begin{equation}
d = \sqrt{d_{x}^2 + d_{y}^2}
\end{equation}