Use the supplied illustrated first frame. Locked front camera. Keep the left wheel hub and the right horizontal guide stationary. Turn the wheel a small amount clockwise so its visible off-center pin moves toward the rightmost side. The single rigid connecting rod stays attached to that same pin and to the center of the same slider. Let the slider move a short distance to the right inside its guide as the rod changes angle. Do not shorten the rod, detach either pivot, move the guide or let the slider rotate. Stop before the crank completes a full turn or reaches a reversal, and hold the connected ending. No cut, no additional moving linkage.
