ITERATION 2

ITERATION 1 CNC Modelling

Assembled Piece

This happen to be the first time I made any furniture and it is quite rewarding to achieve the piece with both traditional wood craft method and CNC at the same time.

It is essentially an assembly of all sort of experiment I did in Hooke Park Workshop. From The CNC puzzle joinery to the traditional lap joint. And different way to treat the wood piece such as painting it and or leave it as it is ,etc.

Overall, I am quite happy how the piece turn out aesthetically and practically as a usable furniture.

After the iteration 2, I wish to explore how patterning can be done with the CNC tool itself.

Prototype 3.1 & 3.2

An attempt to explore other texture possibility with CNC

3.1

Simple form but planning on doing only fine roughing and find out how aesthetic it can be.

3.2

Explore CNC in a slightly complicated form to experience the logistic in setting up to do this small scale of curvature.

The outcome will help me to make comparison with previous way of doing pattern and hence inform me which technique I will employ for later design.

CNC Modelling

1. Roughing 6mm End Mill

* (Roughing area is a 8mm offset from the actual model so there is space for tool to go down during finishing)

2a. Finishing 6mm Ball Nose - Stepover 2mm

2b. Finishing 6mm Ball Nose - Stepover

Failure: When the Wood is too wet it is very difficult to do perfect finishing on both side.

Success: It is possible to do pattern by manipulating the stepover for finishing. (Right hand side)

3a. Roughing 6mm End Mill

3b. Finishing 6mm End Mill-Stepover 0.5mm

Final Prototype

Each dimension of piece is determined by the scraps’ size I collect. The angular and pointy geometry is meant to raise awareness to people as an installation- to rethink if the lecture hall is empty before entering.

Installation will sit on the frame and Part A should weight more than B so the installation can support itself sitting on the frame without addition reinforcement.

The pointy element will also act as hook for users of lecture hall to hang their coat or umbrella before entering the lecture hall. The inhabitants therefore in a way contribute in how the installation will look.

Iteration 4

Tool Used

Iteration 4

Stepover as Pattern

In this piece various of pattern is made by changing the stepover value ranging from 0.5mm to 8mm to create finishing such as strips , coarse and smooth surface.

Stepover 0.5mm (Smooth Finishing)

Stepover 8mm (Clear Pattern, but deeper than 6mm)

Stepover 4mm (Still Smooth)

Stepover 6mm (Clear Pattern)

Stepover 2mm (Clear Pattern)

ITERATION 4 CNC Modelling

Round 1

1a. Set up a timber plate under wood piece (Total height do not exceed 70 mm)

1b. Drill holes of diameter of 6.4mm with 6mm End Mill, for the depth of wood piece as well as wooden plate . (Holes are in symmetry)

3. Remove pieces and turn upside down, there are marks on both wood piece and wood plate

4. Set up the location of the wood piece by slotting in bosom wood (6mm) so it would be at the same location as before but up-side down.

ITERATION 4 Prototype on Site

In terms of scale it will probably look nicer if it is bigger

Tolerance Test

Since the installation relies a lot on joinery putting pieces together,but that it has been difficult to assemble two pieces of CNC component together, I have decide to find out the reasons of that.

Given the general tolerance offset is 0.3mm, I have tested a several variable base on that, which is 0.3mm, 0.5mm, 1.3mm, 1.5mm respectively.

I also wondered why the previous model didn’t work despite that I gave it a 0.3mm tolerance. Turns out if it is a raster cut it will increase in precision of the profile and will result in difficulties in assembly.

The right way to do it is to use profile cut. Which give a better precision on the components’ profile.

Tolerance: 1.5 mm Too Loose

Tolerance: 1.3 mm Loose Fit

Tolerance: 0.5 mm Comfortably Fit

Tolerance: 0.3 mm Tight Fit

Final Design

Whenever the Lecture Hall is being used, there will be a sign sitting outside stopping people from entering. However the sign do little in stopping people from entering the lecture hall abruptly. The installation is therefore, aimed to raise awareness of people before they rush into the room.

In order to achieve this, the installation would act as a coat/umbrella rack , like a frame it will slot onto the existing door frame of lecture hall. And whenever the lecture is being used, people will hang their coats and umbrella outside on the frame and therefore letting people know it is being occupied.