A worm drive, compensated by a cam on a work shaft, produces intermittent motion of the gear.

Input: green shaft.

Orange one start worm has prizmatic joint with the green shaft.

Pink cam is stationary. The cam profile consists of two helix curves of opposite directions. Pitch of the curves is equal to the worm pitch. Red spring maintains contact between the cam and violet pin.

In one revolution of the input, the gear stays immobile and then turns one tooth.