Asian Digital Modeling Contest 2017
Instructions on Preparation of Entries andPrecautions in Data Creation◆Printer used
Entries that have passed the screening process will be modeled using the PolyJet 3D printer * (madeby Stratasys Ltd.) . Table setting size is max. 250mm x 250mm × 200mm.
※ The formal name of 3D printers is “Additive Manufacturing”.
In Asian Digital Modeling Contest 2017, it will be called “3D printers”.
◆Flow to printing using 3D printer①① Build the 3D model using amodeling software such as 3DCAD. Type of file format is STL.
② Cut the 3D model data in thehorizontal direction at the same
thickness to prepare the slicedata(Thethicknessof③

theequipment used in this contest is0.016 ㎜ or 0.03 ㎜).
③ Form thin coatings using resin with thesame shape as the slice data, andlaminate in order from the bottom tobuild the 3D model with the same
shape as the 3D model data.

◆Precautions on preparing 3D model
The following values are estimates.
It may be difficult to remove the support depending on the model built.
Determine if support can be removed from the 3D model data.
(The model cannot be built if the part of 3D model data is too thin.)・ Set the clearance above 0.3mm.
・ The thinnest part of the model must be 0.5mm at the least (Figure 1).
For thin structures, set height of about 10mm (Figure 2) for a thicknessof 0.5mm.
Figure 1

Figure 2

Asian Digital Modeling Contest 2017
Instructions on Preparation of Entries and Precautions in Data Creation

・ Set the tolerance (resolution) to 0.01mm.
・ Do not create space inside the model unless there is an opening.
◆Precautions on building 3D models with 3D CG software
・ The 3D model data must be a solid with structure on a consistent shape and enclosed bypolygons.
・ At places where the polygons are adjoining each other, theymust be separated by more than 0.5mm or the model cannot
be formed properly. (Figure 3)

Figure 3
・ Make sure that polygons which are configured three-dimensionally do not intersect or overlap
with each other.
◆File format
・ The file format must be STL.
※ Any 3D CG software with function to export to STL format or 3D CAD can be used tocreate 3D model data in STL.
※ If your software does not have a function to export to STL, use other conversion software
to convert to STL.
◆File size
・ Data volume：Less than 50MB
※If the STL file size is over 50MB, convert to and submit in XVL format or magics format.

※

For details on file compression, please see “STL data compression method” at the How
to Enter page.

◆Maximum model size
・ Set to 100mm x 100mm x 100mm (volume).
・ The maximum size can be exceeded slightly if the volume is within the required range.
※Entries which have passed the judgment process exceeding the maximum size will bemodeled in a different size.

◆Others
・ The Executive Committee may contact the applicant if there are problems such as data filecannot be opened, etc. at the email address registered for entry. Please make sure that emails
can be received at this address.
・ The unit is “mm” where not indicated in the explanation of entries.
-2–© Organized by Japan Society for Graphic ScienceAsian Digital Modeling Contest 2017
Instructions on Preparation of Entries and Precautions in Data Creation

Data check
Please conduct final checks to make sure that there are no problems with your 3D model structure.
In any of the following cases, use the repair function, etc. of 3D CAD and 3D printers to edit theproblems.
Defect can be found in the structure and there are missing polygon (there are unintended holes).



There are no holes, but some polygons are inverted in the normals direction.



Sheet-shaped 3D models are thin.

When polygons are intentionally built apart, the distance between them is not over 0.5mm

The external shape of the created 3D model is very small.

-3–© Organized by Japan Society for Graphic Science