InputCouplerOutput
1× uses the entered speed: 15 rpm takes 4 seconds per turn. Drawing scale fits the frame and stays fixed during playback.
- Input angle
Double-crank linkage: rotation into rotation
Both input and output rotate in this four-bar example. Unlike a fixed gear ratio, the instantaneous angular-velocity ratio changes during a revolution. The example has a short ground link d. Changing the dimensions may prevent a full revolution.
Linkages
Cam & intermittent motion
Change dimensions & drive
Length unit: mm
Playback controls sit directly below the drawing. Editing pauses playback.
What to watch in this mechanism
Both input and output rotate in this four-bar example. Unlike a fixed gear ratio, the instantaneous angular-velocity ratio changes during a revolution. The example has a short ground link d. Changing the dimensions may prevent a full revolution.
Blue is the prescribed input, green is the connecting link and red is the output. Change the blue dimensions, then use the button to return to the drawing. This page calculates motion, not the required motor force or torque.
Compare the ten mechanism types →