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UNUSUAL CAMS

V. Ryan 2002 - 2009

 

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The Cylindrical Cam / Barrel Cam: As the cylinder cam profile rotates the follower moves upwards. When the follower reaches the top, the cylinder cam rotates in the opposite direction and follower moves back down.

   

These unusual cams are normally composed of a cylinder which has a groove cut out of its surface and it is in this that the follower runs up and down. This type of cam can be seen in some old clock mechanisms and still in modern sewing machines. Machines that perform repetitive movements may use a cylinder cam profile.

 
 
 
The fork lift truck seen below has forks that rise and fall. This is a basic design requirement as the truck is designed to lift and move heavy weights/objects.

Design a mechanical system based on a cylindrical cam and follower(s) that controls the vertical motion of the forks.

Draw your design on the enlarged diagram below adding labels to identify the parts.

Add notes to explain how your system works.
   


NOTES:
 
 
 
 
 
Moving / rotating mechanisms can be a health and safety hazard. List one way in which your design may be a hazard.
 
 
 
How could you protect people from the hazard you have identified?
 
 
 
   

How could you use a cylinder cam as part of a toy project ? Draw a simple diagram adding notes to explain how the toy works.

   

 

   

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