1. Motion Transformation Systems The mechanical fxn of relaying a motion from 1 part to another while altering the nature of the motion.

2. 5 Systems 1) Rack and Pinion Systems 2) Screw Gear Systems Type 1 3) Screw Gear Systems Type 2 4) Cam and Follower Systems 5) Slider-Crank Mechanisms

3. Rack and Pinion Systems Rotation to Translation or Translation to Rotation Reversible

4. Rack and Pinion at least 1 gear = a pinion 1 straight bar with teeth = rack teeth on rack and pinion must be identical frequent lubrication the greater the # of teeth the slower the rotation

5. Rack and Pinion Animation http://www.youtube.com/watch?v=D3MrUngdl CQ

6. Screw Gear Systems Type 1 the screw is the driver rotational is transformed into translational e.g. jacks for lifting cars

7. Screw Gear Type 1 Scissor Car Jack http://www.youtube.com/watch?v= QeB2YxMqogI

8. Screw Gear Systems Type 2 the nut is the driver rotational to translational e.g. pipe wrenches

9. Screw Gear Type 2 Pipe Wrench http://www.youtube.com/watch?v=HYspwtCZ1y o

10. Screw Gear Systems type 1 (car jack) has the nut connected to the screw so that the nut cannot rotate in both systems the threads of the screws and nuts must match type 2 (monkey wrench) has the nut fixed so that its only possible motion is rotational

11. Cam and Follower Systems transform the rotational motion of a cam into the recriprocating translational motion of a follower a back and forth movement like that of a sewing machine cams = rotational axis is centred eccentric cams = rotational axis is off-centre

12. Cam and Follower the follower must be guided in its translational motion the shape of the cam determines how the follower will move a device such as a return spring is usually necessary to keep the follower in continual contact with the cam

13. Cam and follower http://www.youtube.com/watch?v=ZbdsGf_t8hs

14. Slider-Crank Mechanisms used in internal combustion engine to transform the translational motion of the pistons into the rotational motion of the crank

15. Slider - Crank Mechanisms the connecting rod contains 2 bushings to attach it to the crank and piston the cylinder must guide the part moving in translation frequent lubrication

16. Slider - Crank Mechanisms http://www.youtube.com/watch?v=KnASJHtbGB 0