Abstract: 3D printing technology can fabricate models by additive accumulation of a material that is
fused together layer by layer, but the overhang area should be added support structure. The support
structure will not only cause a waste of printing material, but also increase the printing time and
damage the appearance of the model. In this paper, we propose an algorithm on support structure
based on the voxelization model, which analyzes the interaction of voxels, and introduces the support
energy parameters and calculation method. Then we calculate the area of the voxels which need to
add support structure, and finally, we generate the support structure according the voxels area. The
experimental results show that the algorithm can add support structure of the model more accuracy. At
the same time, the voxel-based support algorithm can be used for a research on internal support
structure of a model.

Key words: 3D printing, voxelization model, support energy function, support algorithm