Pitch radius of red gear: R1.

Pitch radius of green gear: R2 = 2R1.

The rotation axis of the red gear is eccentric. Its eccentricity is E1 = 0.125 R1.

Distance between rotation axis of the green gear and the pin for orange slider is E2 = R1.

Length of the yellow connrod L = 3R1

The red gear, the yellow connrod and the red slider create a slider –crank mechanism.

The violet slider has linear motion with approximately uniform speed in the middle of its stroke.

Assembly condition: There is mechanism position when gear rotation axes, pin axes are on the same plane.