University of Twente Student Theses


RM Texturing

Ruiter, Josse (2006) RM Texturing.

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Abstract:The use of Rapid Prototyping has already been proved very useful. The development of new technologies makes it possible to exploit rapid prototyping for end use products: Rapid Manufacturing (RM). Rapid manufacturing divides itself into multiple techniques. The most common techniques are FDM (Fused Deposition Modeling), SLA (Stereo Lithographic Apparatus) and SLS (Selective Laser Sintering). These three techniques all have their advantages and disadvantages, which make them suitable for different kinds of processes. There is one common disadvantage in all layered manufacturing processes. The slicing of the CAD model leaves a characteristic effect called ‘staircasing’ on the produced object. This error cannot be eliminated, but can be scaled down by reducing the thickness of the layers. Because of the reduction in layer thickness the production time will be longer, which is not cost effective. Another capability is to apply a surface texture, which denotes a set of tiny repetitive geometric features on the object surface. Compared to post-finishing solutions, direct texturing has potential advantages in terms of flexibility, cost and responsiveness. TNO has developed software to apply textures on CAD surfaces. This software includes two techniques: macrotextures and displacement mapping. Macrotextures are tiny features applied to a surface following a grid. Displacement mapping is a technique to append detail on surfaces by adding surface complexity resulting in silhouettes. In this paper the two techniques are investigated for use on CAD models. The textures can be designed by looking at the possibilities these techniques offer. To design textures the problem must be enclosed in a frame, because of the endless possibilities in sorts of textures. Emotion-based disign is a valuable tool to create interaction between product and user. Designers do not only design functional products, but also aim to design products as a carrier of emotion. Surface texture can provoke actions like grabbing a handle or stroke a fur. Therefore texture design based upon emotion seems to be an obvious step. To do this, a list of 15 emotions was compounded. By making a collage, every emotion was visualized. After this a texture was designed for every emotion resulting in 15 corresponding textures. To evaluate the texture designs, a user research has been carried out among 20 participants. They were asked to link each test shape with the corresponding emotion. A number of different conclusions can be taken. The most important conclusion is that linking texture design with emotion is possible, but proves to be very difficult to achieve. This is because the design in CAD may look different compared to the RM-produced object. Moreover the ability to reproduce fine surface textures relies heavily on the machine’s accuracy, which is limited.
Item Type:Essay (Bachelor)
TNO Industrie en Techniek
Faculty:ET: Engineering Technology
Subject:21 art forms
Programme:Industrial Design BSc (56955)
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