CLICK HERE FOR INDEX PAGE
 
SYSTEMS PREPARATION QUESTIONS 2008 - 4
 
V. Ryan 2008-2017
 
PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET
 
A second version of the clown model has been manufactured (see previous question). This is mechanically operated by a rotating device.
 
 
Draw the mechanical device on the diagram above
 
ANSWER
 
 
 
 
What is the function of the pivot ?
 
 
 
 
 
ANSWER
 
The pivot allows the barrier to rotate at a specific point. In this case the barrier rotates upwards and downwards about the pivot.
 
Name the device and explain how it works.
 
DEVICE NAME: _________________________________________
 
How it works:
 
 
 
 
 
ANSWERS
 
DEVICE NAME: Eccentric Cam
 
How it works:
 
As the eccentric cam rotates in a clockwise direction the barrier is pushed upwards at a constant rate. It then descends at a constant rate back to its original position.
 
What is the function of the spring ?
 
ANSWER
 
What is the function of the spring ?
 
The spring returns the arms to a level position when the eccentric cam has dropped to its lowest position. It also helps ensure that the motion of the entire mechanism is smooth.
 
 
 
CLICK HERE FOR ELECTRONICS INDEX PAGE
 
 
Google
 
Web www.technologystudent.com