J. Technology and Education, Vol.21, No.1, pp.9-16 (2014)

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Design and creation of a molecular model for a 3D printer

 

Tadayosi YOSHIMURA1 and Michiyori YOSHIMURA2

1Fukui National College of Technology(Geshi, Sabae, Fukui 916-8507, Japan)

2Tsurugakehi High School(Kutsumi 164-1, Tsuruga, Fukui 914-8558, Japan)

 

(Received December 16, 2013; Accepted January 10, 2014 )

 

Molecular modeling software has many applications. However, molecular modeling of the CAD system to create an STL file is almost nonexistent. Molecular structure coordinate data, which have been published, cannot be directly exploited by CAD.

OpenSCAD is written in an object language in the same way programmers write solid 3D CAD models. It is not model interactive; instead, the user draws or constructs an object by reading a script. Therefore, CAD is optimal for inputting coordinate data of a molecular structure from the keyboard. As a result, the user is able to create an STL file for a 3D printer by using OpenSCAD.

To display a 3D molecular structure, written scripts are constructed by using two settings: the covalent radius of the sphere of the atoms (sphere (r=10.4)) and the coordinates (translate ([x, y, z])). This method is optimal for 3D modeling of small molecules. We publish lists of the OpenSCAD language of several molecular sphere models in this paper.

Key words: molecular sphere model, molecular modeling software, molecular structure coordinate data, OpenSCAD, creating an STL file for a 3D printer

 

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