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knowledge base
making models: creating STL (stereo lithography)
files from Microstation
1. STL files can be created from the following MicroStation
data:
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Primitive Solids
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SmartSolids - created by modifying primitives.
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Feature Solids - created using the Feature
Modelling Tools.
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TriForma Forms and Solids - created using TriForma,
Bentley Architecture,
Bentley Structural etc.
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Closed surfaces - the most problematic route
to creating STL output, only attempt this if you
have legacy data drawn in surfaces. All surfaces
must be fully closed and all normals must point
out - use the Change Normal Direction Tool to
correct bad normals.
2. Scale before you Export:
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The model must fit the build chamber (254 x
356 x 203 for the Spectrum 510).
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Strengthen weak parts. Calculate smallest part
size based on diameter 1/10th length for fine
members - 0.6mm diameter = 6mm length - and something
like thickness 1/25th width for wall or slab -
0.6mm x 15mm. In reality the better the support
at either end of a member the higher the thickness
to length ratio can be.
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Scaling before you export will vastly reduce
the size of file created and not in any way affect
the quality of the printed model. Well supported
members of approx 0.8mm diameter spanning 35mm
3. Choose appropriate export settings.
4. Open or import the file into ZPrint Software
for 3D printing or editing further with ZEdit.
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