Thanks Philip - quick response (sorry, I forwarded your first, therefore
the double post).
The material of the lugs, that connect the tube is crucial for the
overall stability. Plastic is surely a no go. What about sintered metal?
The CNC-solution is an interesting idea, we should keep in mind.
Grüße,
Jürgen.
On 21.08.2017 20:25, Philip Hahn wrote:
As much as I love the idea - as someone who both cycles as a primary
vehicle and has melted 10+kg of plastic in his printer over the last
year - this will not be a robust or safe idea in any available plastic.
The deposition of layers in the X-Y plane results in weakness in the Z
plane, highly susceptible to both shear and tensile loading. Think of it
as separate laminations which have a weakness in bonding between laminas.
I would suggest perhaps that idea of tubes and connectors aimed at the
CNC community. Homebrew hobby CNC machines are built for under $1000 or
about 3x the cost of a decent printer. They are driven by the same gcode
so you can prototype on your printer and then make metal parts with the
same code. I'm currently working on such a CNC conversion at the moment.
philip hahn
On Mon, Aug 21, 2017 at 11:17 AM, Jürgen Mages <jmages@xxxxxx
<mailto:jmages@xxxxxx>> wrote:
I think, it is about time to reanimate an idea, made by Dirk Bonné
in 2011: The 3D-printing of a python frame. I guess, the printing
technology has advanced in a way, we can seriously start to work
with it.
Thus I have set up a wiki page:
http://en.openbike.org/wiki/3D-Printing
<http://en.openbike.org/wiki/3D-Printing>
Here we can gather all useful information and hopefully one day the
first prototype will be made.
Everybody interested is invited to contribute ...
Cheers,
Jürgen.
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