Secondary 2 E/N(A) Design and Technology Projectwork 2008

Material List (every student):
(I) Acrylic (plastic) - 250 x 250 x 3 (1 piece)
(II) Jelutong (wood) - 400 x 200 x 20 (1 piece)
(III) Jelutong Rod (wood) - D12x290 (1 piece)
(IV) Acrylic Rod (plastic) - D8x250 (1 piece)
Note: All dimensions (in D&T) are in millimetres (mm). D12x290 means Diameter 12 and length 290.

Projectwork:
You are to design and build two projects:

(I) a holder (for mainly small objects)
(II) a cam and follower project

Holder:
You are to use Item (I) under the Material List to design and make a holder for small objects. The objects to be held can be bigger but you have to come out with a method to hold it instead of a box to put it in. Do NOT just make a square/rectangular box and put your objects in. Remember that design plays an important part. Some objects you may want to consider for your holder to be used for includes coins, stationary (pen, pencil, ruler, eraser, paper clips etc.), remote-controls (for television, air-cons, DVD players etc.), handphones, CDs, thumb drives, keys. Do explore different shapes and forms (3D) and try to make use of techniques like shape-borrowing or SCAMPER. If you want to find out what SCAMPER means, it's inside your D&T textbook or you can also find out from

here.

Cam and Follower Project:
You are to use Items (II), (III) and (IV) to design and make a cam and follower project. This is a type of mechanism where there are moving parts. Basically there will be a cam (cut out from Jelutong) that is turned by a handle (bent from Acrylic rod) attached to it. When the cam turns, it will move the follower, which is the Jelutong rod, up and down depending on the shape and design of the cam. I have attached a picture of the cam and follower mechanism below to help illustrate this:

The rotating grey object is the cam while the red object is the follower. At the centre of the cam there is this small green circle. This is where the plastic handle will be attached to and it is the centre of rotation. You can design and change the shape of the cam as long as it can move the follower up and down when you rotate the cam.
Of course the cam and follower cannot be moving in mid-air attached to nothing. So you will have to make a stand to hold and support the cam and follower. All this will come from the materials that are mentioned earlier above in the material list. You must plan the use of your materials very carefully if not you may end up not having enough materials for your cam and follower project especially if you waste too much of your materials.

Last updated: 17/6/08