Input: orange crank.
Output: blue rocker of straight groove.
In 1 rev. of the input, the output turns 180 deg. then stops.
Pause time corresponds around one forth of of working period.
Crank radius: a.
Length of green conrod: b + c
Center distance of two stationary bearings: d
d = (b + c) – a
In this video: a = 50; b = 120; c = 180; d = 250