The Shapeways Blog: 3D Printing News & Innovation

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Design rules & detail resolution for 3D printing


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Very useful stuff! I look forward to being able to apply this information. Thanks for getting us this data!

What I'm hoping for next, beside flying cars and housekeeping robots, is to see how WSF material behaves under dynamic cases: For example plastic and elastic deformation statistics for strips and rods of various thicknesses. Also I'd be curious in testing of the lifetime of the materials under stresses (repeatedly bend strips and rods of materials until their point of failure). Heck, maybe even such things like finding the coefficient of friction of WSF vs WSF as a function of contact area.

Thanks for the useful info, and keep up the good work. I wish I had these stats before I sent my models to order last week. :-)
#1 Psawhn on 2009-05-18 19:03 (Reply)
Psawhn,

We're working on deformation statistics. We also have data on stresses and we will get that to you also. Friction is something we have not come up with a test for.

Joris
#2 Joris on 2009-05-18 19:06 (Reply)
Sounds incredible! Looking forward to it!

I just noticed that pins were consistently thinner than designed - this is definitely important to keep in mind. I also find the negative correlation between the size of pin and magnitude of deviation interesting.

If I may make a suggestion to the graphs: I would find them easier to read if the independent axis was nominal wall thickness, not measurement number, so the graph would be Deviation vs. Nominal Thickness. This would flatten out the curves and make correlations and lines of best fit more intuitive to see. I could also be picky about choice of colour, but I won't. ;-)
#3 Psawhn on 2009-05-18 19:31 (Reply)
Great stuff guys!
One thing that's not a 100% clear to me though: regarding the "Switch from edge to contour exposure".

How I understand it is that for walls below 0.8mm the laser's path goes back and forth but (because it doesn't want to overlap itself?) the paths don't fit and the actual wall thickness therefore is bigger than the nominal thickness.

Am I right? Maybe it could be explained in a different way. The image is quite confusing to be honest.
#4 Peter Hermans on 2009-05-18 20:48 (Reply)
Psawhn,

for this tutorial we do not have the raw data, we only have the output. For the other tutorials that will follow we do have the data so we could do things like that.

Joris
#5 Joris on 2009-05-19 07:49 (Reply)

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