｢Mac People magazine’s｣ April 2013 issue
｢Mokei-teki Monozukuri #4-1｣ Article
[ Design & Text: Naoki Terada ]

With work efficiency in mind, machined with a single drill

With work efficiency in mind, machined with a single drill

Inorganic artificial wood is very light and easy to process while having a plaster-like feel. If a material were to be heavy, it may cause an accident. In addition, high workability leads to a cost reduction. For these reasons, I considered it best for a wall clock.

With this material in mind, I immediately began working on the design. Since the theme was “texture” on this occasion, I needed a design that would enable me to make a direct expression using a processing method most suitable for the inorganic artificial wood.

When this material is used at a construction site, the basic process is performed at the factory, so only installation is required at the site in most instances. Thus, based on the design image data submitted, the factory produces components using a cutting machine equipped with Numerical Control (NC) machining technology. The rotating drill bit moves to trace the shape of the design image based on the numerical values inputted by the computer.

Various types of data are submitted to the factory. If 3D data is submitted, the factory can use it as it is. If 2D drawings made using, for example, Adobe Illustrator are submitted, the factory then converts them for a cutting machine. I adopted the latter method for these clocks.

The first thing I considered was what I could do when machining a shape with a rotating drill bit.I then decided to use only one drill when cutting out the indexes from a plate through the NC machining process.Using many types of drills in different sizes will decrease production efficiency, and a thin drill will break easily, which is inconvenient.

On this occasion, I used the most efficient drill bit with a diameter of 5 mm and rounded all corners into a semicircle to design a typeface that allows numbers to be engraved. I also set the line weight to 5 mm to minimize the cutting length and time spent using the drill bit.

Thus, I decided the direction the dial design was taking. Yet, there were other countless matters to consider, including a balance between the dial size and numbers, the aspect ratio of the numbers, and the engraving depth. A simple, plain dial meant that a slight change in size or shape would have a significant impact on the balance, so I proceeded with this task carefully, spending a lot of time on it.