TY  - JOUR
A1  - Baudisch, Patrick Markus
A1  - Silber, Arthur
A1  - Kommana, Yannis
A1  - Gruner, Milan
A1  - Wall, Ludwig
A1  - Reuss, Kevin
A1  - Heilman, Lukas
A1  - Kovacs, Robert
A1  - Rechlitz, Daniel
A1  - Roumen, Thijs
T1  - Kyub
BT  - A 3D Editor for Modeling Sturdy Laser-Cut Objects
JF  - Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems
N2  - We present an interactive editing system for laser cutting called kyub. Kyub allows users to create models efficiently in 3D, which it then unfolds into the 2D plates laser cutters expect. Unlike earlier systems, such as FlatFitFab, kyub affords construction based on closed box structures, which allows users to turn very thin material, such as 4mm plywood, into objects capable of withstanding large forces, such as chairs users can actually sit on. To afford such sturdy construction, every kyub project begins with a simple finger-joint "boxel"-a structure we found to be capable of withstanding over 500kg of load. Users then extend their model by attaching additional boxels. Boxels merge automatically, resulting in larger, yet equally strong structures. While the concept of stacking boxels allows kyub to offer the strong affordance and ease of use of a voxel-based editor, boxels are not confined to a grid and readily combine with kuyb's various geometry deformation tools. In our technical evaluation, objects built with kyub withstood hundreds of kilograms of loads. In our user study, non-engineers rated the learnability of kyub 6.1/7.
KW  - Personal fabrication
KW  - laser cutting
KW  - interactive editing
Y1  - 2019
SN  - 978-1-4503-5970-2
U6  - https://doi.org/10.1145/3290605.3300796
SP  - 1
EP  - 12
PB  - Association for Computing Machinery
CY  - New York
ER  - 
TY  - GEN
A1  - Roumen, Thijs
A1  - Shigeyama, Jotaro
A1  - Rudolph, Julius Cosmo Romeo
A1  - Grzelka, Felix
A1  - Baudisch, Patrick
T1  - SpringFit
BT  - Joints and mounts that fabricate on any laser cutter
T2  - User Interface Software and Technology
N2  - Joints are crucial to laser cutting as they allow making three-dimensional objects; mounts are crucial because they allow embedding technical components, such as motors. Unfortunately, mounts and joints tend to fail when trying to fabricate a model on a different laser cutter or from a different material. The reason for this lies in the way mounts and joints hold objects in place, which is by forcing them into slightly smaller openings. Such "press fit" mechanisms unfortunately are susceptible to the small changes in diameter that occur when switching to a machine that removes more or less material ("kerf"), as well as to changes in stiffness, as they occur when switching to a different material. We present a software tool called springFit that resolves this problem by replacing the problematic press fit-based mounts and joints with what we call cantilever-based mounts and joints. A cantilever spring is simply a long thin piece of material that pushes against the object to be held. Unlike press fits, cantilever springs are robust against variations in kerf and material; they can even handle very high variations, simply by using longer springs. SpringFit converts models in the form of 2D cutting plans by replacing all contained mounts, notch joints, finger joints, and t-joints. In our technical evaluation, we used springFit to convert 14 models downloaded from the web.
KW  - Laser cutting
KW  - fabrication
KW  - portability
KW  - reuse
Y1  - 2019
SN  - 978-1-4503-6816-2
U6  - https://doi.org/10.1145/3332165.3347930
SP  - 727
EP  - 738
PB  - Association for Computing Machinery
CY  - New York
ER  -