3cad

http://fusion360.autodesk.com/about?...Fusion360Media

On 1/31/2015 8:48 AM, wrote:
http://fusion360.autodesk.com/about?...Fusion360Media


No need to clean your chain, just telephone your 3D printer
and a new chain will be waiting for you after the ride.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

AMuzi wrote:
On 1/31/2015 8:48 AM, wrote:
http://fusion360.autodesk.com/about?...Fusion360Media


No need to clean your chain, just telephone your 3D printer and a new
chain will be waiting for you after the ride.


Even better, mount your 3D printer on the rear chain stay and "print" a
single use chain directly into your rear derailleur. At the front, you have
three options:
a) Snip it off every rotation of the front crank and drop the used chain on
the road. This should appeal to weight weenies and touring cyclists afraid
of getting lost.

b) Store it in a small bin under the bottom bracket for future recycling.

c) Melt the used chain, filter out all the schmutz from the road and use it
as feedstock for the printer in the rear.

I expect a patent infringement lawsuit from Jeff Liebermann any day now.

LIEB'S AN ELECTRICIAN, Beattie's a lawyer.

Ima gonna hollow out every part n email to China for reduction.

did you find how to represent your work here at RBT ?

On Sat, 31 Jan 2015 18:48:56 GMT, Ralph Barone
wrote:

AMuzi wrote:
On 1/31/2015 8:48 AM, wrote:
http://fusion360.autodesk.com/about?...Fusion360Media


No need to clean your chain, just telephone your 3D printer and a new
chain will be waiting for you after the ride.

Even better, mount your 3D printer on the rear chain stay and "print" a
single use chain directly into your rear derailleur.

Not this week. 3D printers tend to be rather larger and require
substantial power to melt the plastic. A bicycle dynamo certainly
won't power it. I was thinking of a propane powered 3D printer, but
that's another project (Portable 3D printing).

a) Snip it off every rotation of the front crank and drop the used chain on
the road. This should appeal to weight weenies and touring cyclists afraid
of getting lost.

Ummm... there's a stainless steel cable under the plastic "lumps" that
make up the chain.
http://802.11junk.com/jeffl/pics/Berg/index.html
On the fly trimming might be difficult.

b) Store it in a small bin under the bottom bracket for future recycling.

Probably a good idea. I wouldn't want anyone to get a ticket for
littering.

c) Melt the used chain, filter out all the schmutz from the road and use it
as feedstock for the printer in the rear.

Cleaning plastic suitable for 3D printing is difficult because of the
small orifice size in the 3D printer. There are plastic recycling
machines for 3D printers, but they are intended for recycling clean
plastic, not a plastic and dirt mix:
http://www.appropedia.org/Recyclebot
http://www.3ders.org/articles/20140304-turning-old-plastic-into-3d-printer-filament-is-greener-than-conventional-recycling.html
These are useful because of all the waste and scrap generated by the
typical trial and much error approach to learning 3D printing[1].

I expect a patent infringement lawsuit from Jeff Liebermann any day now.

Nope. I don't sue, mostly because I have too many attorneys in the
family that I detest. I prefer to hire Mongo and his gang of
accomplices to personally demonstrate my concerns to the infringer.


[1] I've made about 5 different parts so far. The first 3 resulted
in scrap with everything failing to fit or function. The last two
were better, actually fit, but only lasted a short while due to lousy
material characteristics. The parts tended to crumble under stress.
I'm considering giving up 3D printing and going back to conventional
machining.


Drivel: Accidentally found while Googling for something else:
http://sonic.net/~ckelly/Seekay/weird_bike_stuff.htm
http://sonic.net/~ckelly/Seekay/weird_bike_stuff2.htm

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

GET A FURNACE

https://www.google.com/#q=3D+PRINTIN...UMINUM+CASTING

do you climb ?

On 1/31/2015 5:45 PM, wrote:
GET A FURNACE

https://www.google.com/#q=3D+PRINTIN...UMINUM+CASTING

do you climb ?

Yep. I've seen it done, using bronze. The pattern was printed in wax,
then standard Lost Wax techniques were used to cast the bronze.

--
- Frank Krygowski

Frank Krygowski wrote:
On 1/31/2015 5:45 PM, wrote:
GET A FURNACE

https://www.google.com/#q=3D+PRINTIN...UMINUM+CASTING

do you climb ?

Yep. I've seen it done, using bronze. The pattern was printed in wax,
then standard Lost Wax techniques were used to cast the bronze.


It's too bad that the technology to create custom cast lugs (parametric 3-D
CAD and 3-D printers, coupled with the casting method above) is starting to
mature after the parts themselves went out of style.

On Sat, 31 Jan 2015 18:56:12 -0500, Frank Krygowski
wrote:

On 1/31/2015 5:45 PM, wrote:
GET A FURNACE
https://www.google.com/#q=3D+PRINTIN...UMINUM+CASTING

In the distant past, I used to have a home foundry, which I used to
make various lead, brass, bronze, and aluminum parts. I tried lost
wax sand casting, but was not particularly successful. My big problem
was preventing voids from forming inside the casting, which limited
the strength of the part. I traded the whole mess to a local
sculpture.

do you climb ?

I did free climbing in my early 20's, aid climbing somewhat later, and
gave it up in my early 30's. I'm 67 now, so climbing is too risky.

Yep. I've seen it done, using bronze. The pattern was printed in wax,
then standard Lost Wax techniques were used to cast the bronze.

Right. However, lost wax sand casting has its limitations, such as
not being able to cast parts with included voids, smooth surfaces,
threaded holes, etc. While such parts are easy with 3D printing, they
are difficult or impossible with sand casting.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Sun, 01 Feb 2015 01:00:56 GMT, Ralph Barone
wrote:

Frank Krygowski wrote:
On 1/31/2015 5:45 PM, wrote:
GET A FURNACE

https://www.google.com/#q=3D+PRINTIN...UMINUM+CASTING

do you climb ?

Yep. I've seen it done, using bronze. The pattern was printed in wax,
then standard Lost Wax techniques were used to cast the bronze.

It's too bad that the technology to create custom cast lugs (parametric 3-D
CAD and 3-D printers, coupled with the casting method above) is starting to
mature after the parts themselves went out of style.

Sure lugs can be sand cast. However, stampings and forgings are
stronger, have fewer imperfections, require fewer secondary
operations, and are cheaper (after the tooling is amortized):
http://www.saltcycle.org/2008/05/lugs.html
Also, if one must use cast lugs, they will probably be thicker and
heavier, than a stamped or forged lug.


--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558