CS 294-3: RAPID PROTOTYPING
Lecture #3 -- Sep. 15, 2000.
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Discussion of Results of Assignment A#2
- What kind of knots did you design ?
- How did you do it ?
Fabrication Accuracy in SFF
More on Designing with SLIDE
- Fancier sweeps
- Use of symmetry
Preparing for FDM: QuickSlice
Running the FDM Machine
Homework Assignment:
A#3: Design parts with six-fold rotational symmetry:
e.g., a flower, vase, propeller, gear wheel, abstract sculpture, ...
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Using SLIDE, advanced sweeps (perhaps using warps or morphs) design a simple shape, perhaps with 2-fold symmetry;
then place 6 instances of that shape symmetrically around an axis to make an object with 6-fold symmetry.
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Depending on the shape and orientation of the master instance, the resulting object can belong to one of
7 possible symmetry groups,
- - in this case to the right-most column in the survey chart.
Those 2 classes of 3D rotational symmetry groups can be derived from the
7 types of linear Friezes by wrapping 6 copies of these frieze tiles cylindrically around a vertical axis.
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Make seven simple conceptual objects that all belong to different symmetry groups, and for each capture a picture and label it with the symmetry group name.
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Make one more elaborate object of the group of your choosing, suitable for FDM fabrication.
Also capture a picture of that design and
save a suitable STL file in a public_html directory.
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Carlo H. Séquin