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Twenty-five real pinball machines had track-moveable flippers (usually called "zipper flippers"): 21 from Bally and 4 from Williams. Probably the two most well-known are Fireball and Medusa.Unlike the original zipper flippers, I envision Sin as having the flippers anchored to the inlane return walls as on any other table. However, the inlane return walls consist of an outer, fixed part and an inner, retractable part that can be moved a fraction of an inch at a time by a stepper motor. In this way, the flippers themselves can be anchored strongly, while the mechanism that does the moving is inside the inlane return wall and protected from violent strikes from the ball.
Twenty-five real pinball machines had track-moveable flippers (usually called "zipper flippers"): 21 from Bally and 4 from Williams. Probably the two most well-known are Fireball and Medusa.
Unlike the original zipper flippers, I envision Sin as having the flippers anchored to the inlane return walls as on any other table. However, the inlane return walls consist of an outer, fixed part and an inner, retractable part that can be moved a fraction of an inch at a time by a stepper motor. In this way, the flippers themselves can be anchored strongly, while the mechanism that does the moving is inside the inlane return wall and protected from violent strikes from the ball.
