B-band Ukko Instruction Manual download pdf (Page 21)

Student 23974754 Page 21 Design and Technology MDP: Cajón with Effects

FINAL CONSTRUCTION

The final Cajón needed to be made exactly how I want it to be. This meant that I needed to learn from the

prototype regarding various issues that arose. For the final Cajón, I planned to:

• Use finger joints for the side edges, and butt joints to attach the tapa and back

• Glue all joints except for the tapa which will be screwed to the box

• Use half-width holes in each side for the snare-dowel to sit into

• Countersink the tapa screws evenly

• Make a larger and more centred sound hole

• Include the components in the rear

CONSTRUCTION

1. Having purchased 2.5mm and 19mm plywood, I was able to begin the final construction by marking out

the wood. I began by marking out a 300 x 480 piece of the 2.5mm ply for the tapa, followed by the rest

of the pieces using the 19mm ply. After marking out however, I realized that I could have marked it out

better, so that the grain almost perfectly followed around the sides, the top and bottom. For this

reason, I erased what I had done and marked out again.

Although marking out the wood took almost three hours, I was happy with the result. I’m glad

that I realized about how the grain should run before cutting it.

2. Once I had completed this, my teacher cut the wood using a track saw, which is banned for students to

use. Although we could have used a table saw, moving such a heavy sheet through it would have

proved difficult and may not have been as accurate. We began by sawing the long piece, before sawing

each side and top from that. When sawing the long piece, it was important to clamp the track of the

track saw to the wood, to prevent it from moving during the long 2.4m cut.

After cutting each part, I re-measured the dimensions to find that one end was about 2mm

wider than the other. This means that there must have been a taper while cutting. Due to

the small size of it, we kept going and hoped that it would not matter for the construction.

VALUATION

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B-band Ukko Instruction Manual Page 21