1. CAMS, Eccentrics & Ratchets

2. CAMS ARE MECHANICAL DEVICES THAT CHANGE ROTARY MOTION TO LINEAR MOTION
CAM ROTARY MOTION
LEVER LINEAR MOTION

3. CAM Followers and Linkages Transfer the Linear Motion of the CAM Lobe to the place where it is used

4. CAM Lobe Parts
Toe
Flank
Ramp
Base Circle
Heel

5. CAM Lobe Lift

6. CAM Displacement Graph
AS ECCENTRIC CAM ROTATES ONE REVOLUTION OR 360 DEGREES THE MOVEMENT OF THE FOLLOWER IS SHOWN BY THE LINE ON THE GRAPH. AT 180 DEGREES THE FOLLOWER IS AT ITS MAXIMUN HEIGHT.

7. Basic CAM Shapes
Circle
Heart
Acceleration
Pear

8. Flat Plate CAM With Roller Follower

9. Groove Box and Grooved Flat Plate Cam Groove Box CAM

10. CYNDRICAL CAM and FACE CAM
Both provide a rocking motion

11. Peripheral CAMS
Peripheral cams are the most widely used form of an eccentric cam
In the peripheral cam, a follower rides on the outside edge of the cam
The high spot on the cam is called the lobe
The low spot is called the dwell
Cams can also move the follower at different levels

12. Eccentric and Strap
The eccentric is inside a device called an eccentric strap
The eccentric is used where heavy loads are moved
The strap is connected to a link or rod which in turn is fastened to a pivot on an object which moves linearly

13. Cloverleaf and Swash plate CAM
Cam Variations
Cloverleaf
drives the follower bar in both directions
Swash plate
provides rocking motion

14. Different Style of a Swash Plate CAM

15. POINT SLIDING ROLLER ANGLE
Types of CAM Followers
POINT SLIDING ROLLER ANGLE

16. Using CAMS 3 Port pneumatic valve is opened and closed
Rotating CAM Controls the operation of a car distributor

17. Using CAMS In Gas Engines

18. Engine CAMS
Small Engine CAM
Car Engine Cams

19. Eccentric CAMS
Concentric Circle
Eccentric Circle

20. Fuel Pump Design Using An Eccentric CAM

21. Connecting Rods
Sometimes called coupling rods these are used to transfer energy from one moving part to another, without using gears or axles
Used to synchronize the movement of parts, to convert rotary motion to oscillating movement

22. Ratchet Wheel And Pawl

23. Types Of Ratchets and Pawls

24. Ratchet Wheel and Pawl Used To Arrest Motion

25. Fishing Reel Uses a Ratchet Wheel and Pawl

26. Hand Crank Winch Using a Ratchet and Pawl

27. Come Along Uses A Ratchet Wheel and Pawl

28. Answer The Following What Is A CAM? What Does A CAM Do?
Name 5 Different Types Of CAMs.
What Is A Follower?
Name 4 Types Of Followers.
What Is A Ratchet?
What Is A Pawl?
What Is A Ratchet And Pawl Used For?
What Is An Eccentric?