Recent digital fabrication tools have opened up accessibility to personalized rapid prototyping; however, such tools are limited to product-scale objects. The materials currently available for use in 3D printing are too fine for large-scale objects, and CNC gantry sizes limit the scope of printable objects. In this paper, we propose a new method for printing architecture-scale objects. Our proposal includes three developments: (i) a construction material consisting of chopsticks and glue, (ii) a handheld chopstick dispenser, and (iii) a printing guidance system that uses projection mapping. The proposed chopstickglue material is cost effective, environmentally sustainable, and can be printed more quickly than conventional materials. The developed handheld dispenser enables consistent feeding of the chopstickglue material composite. The printing guidance system — consisting of a depth camera and a projector — evaluates a given shape in real time and indicates where humans should deposit chopsticks by projecting a simple color code onto the form under construction. Given the mechanical specifications of the stickglue composite, an experimental pavilion was designed as a case study of the proposed method and built without scaffoldings and formworks. The case study also revealed several fundamental limitations, such as the projector does not work in daylight, which requires future investigations.
Hironori Yoshida, Takeo Igarashi, Yusuke Obuchi, Yosuke Takami, Jun Sato, Mika Araki, Masaaki Miki, Kosuke Nagata, Kazuhide Sakai, and Syunsuke Igarashi. "Architecture-Scale Human-Assisted Additive Manufacturing." ACM Transactions on Graphics (Proc. ACM SIGGRAPH 2015).
We would like to thank the team from Shimiz Corp. : H. Umeyama, T. Satoh, H. Ogura, K. Tanno, M. Indo, K. Takeuchi. The pavilion could not be built without the supports from the lab staffs and students: S. Sugita, TK. Kiuchi, TH. Kiuchi, K. Clement, A.Rod, M. Xu, F. Osman, Q. Jin, O. Saraya, B. Berwick, Y. Xiong, J.Vranovsky, G. Judhinaputra, P. Virutamawongse, S. Aaron, R. Shatarova, R. Sam, Y. Xu, D. Lopez, H. Habib, A. Crusius, M. Mori, A. Karlsson, Y. Lu, J. Lai. We thank M.Nakamoto and his colleagues for providing leftover chopsticks almost for free. Finally, we thank A. Ivelich for her continuous English collection.