Date: Sun, 22 Oct 2017 19:28:33 -0400
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From: rp-ml [mailto:rp-ml-bounces_at_rp-ml.org] On Behalf Of Deniz, Sebastian
Sent: Sunday, October 22, 2017 6:32 AM
To: Rapid prototyping mailing list <rp-ml_at_rp-ml.org>; 'Steven Adler (A3DM)'
<adler_at_a3dm.com>
Subject: Re: [rp-ml] Quadrax and Cubital ball in cage and gear tree
Hi guys,
I have this STL file and I believe it is the original one.
Send me your email address and I can forward it to you.
Best Regards,
Sebastian
Sebastian Deniz | Customer Services Manager, Latin America
3D Systems, Av. Riachuelo 92, Diadema SP 09912-190, BR
Tel: +55 11 3318 5153 Mobile: +55 11 99621-1483 www.
<http://3dsystems.com/> 3dsystems.com
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From: rp-ml [mailto:rp-ml-bounces_at_rp-ml.org] On Behalf Of Marshall Burns
Sent: Saturday, October 21, 2017 23:13
To: 'Steven Adler (A3DM)' <adler_at_a3dm.com <mailto:adler_at_a3dm.com> >
Cc: 'Rapid prototyping mailing list' <rp-ml_at_rp-ml.org
<mailto:rp-ml_at_rp-ml.org> >
Subject: Re: [rp-ml] Quadrax and Cubital ball in cage and gear tree
Hi Steven,
The file the other person sent me is available on
Thingiverse at:
www.thingiverse.com/thing:1532
<http://www.thingiverse.com/thing:1532>
and on the RepRap Wiki at:
www.reprap.org/wiki/File:Brain-gear.stl
<http://www.reprap.org/wiki/File:Brain-gear.stl>
The files at those links are identical. The one at Thingiverse has a date in
2010, the other one in 2008. They were both contributed by someone using the
name "mappum" or "Mappum."
This is definitely not the original. If you compare it to
the photo I linked to below, you'll see that the original design had much
thicker axle junctions with flat ends, as well as a smaller base. Aside from
the geometrical differences, it's also interesting to note that the Mappum
design is supplied oriented upside down. This might be intended to make it
more easily compatible with devices that use support structures, in which
case they would want the lightest part of the object built above the
heaviest part. Cubital would not have had to think about such things since
it was building in a solid environment.
So I'm still looking for the originals (or reasonable
facsimiles, if necessary). The photos I linked to below are of objects I
obtained in 1991, so the STL files to make them were created in that year or
earlier.
From: rp-ml [mailto:rp-ml-bounces_at_rp-ml.org] On Behalf Of Steven Adler
(A3DM)
Sent: Saturday, October 21, 2017 18:21
To: Rapid prototyping mailing list
Subject: Re: [rp-ml] Quadrax and Cubital ball in cage and gear tree
Hey Marshall
Blast from the past ... can you forward the Brain Gear file to me. I have
been searching my archives but have yet to find it..,
What year was it ?
Steven Adler
Mobile 503-250-3324
On Oct 21, 2017, at 6:33 PM, Marshall Burns <ListMail2_at_fabbers.com
<mailto:ListMail2_at_fabbers.com> > wrote:
Hi Jan,
That would be fantastic. I only got one other response so
far, which sent me a copy of the brain gear file from Thingiverse. I was
wondering about the possibility of reproducing the CAD from the photographs.
It does seem like that would be pretty simple (for someone well experienced
in CAD) for the ball in the cage. I would really appreciate that.
From: rp-ml [mailto:rp-ml-bounces_at_rp-ml.org] On Behalf Of Jan Andrzejewski
Sent: Saturday, October 21, 2017 14:29
To: Rapid prototyping mailing list
Subject: Re: [rp-ml] Quadrax and Cubital ball in cage and gear tree
Hi Marshall
If you have problems getting this I will offer to recreate the CAD for this,
I'll send you what I can do from the picture. (Ball in Cage)
I have an STL model that comes from 1990 I do not know what the original
file name was But I have always called it the G-Cube
<https://grabcad.com/library/sla-g-cube-fun-puzzle-1> .
A German Field Engineer called "Gunther" let me have the STL file whilst I
was learning to operate the SLA250 at Lasercad (Feb 1990)
If anyone from Germany knows where it came from originally I too would like
to know this.
The actual model was very helpful when I went from Lasercad to Formation
Engineering Services Ltd in 1991 as I got two CAD software companies to try
and model from the actual object and The Anvil 5000 struggled as at one
corner 3 edges came together with each edge having a 5 mm radius and this
was something that that software package struggled with at that time. But
Euclid from Matra Datavision was able to do this in solids as well as
surface modelling.
How 3D software has changed!
Regards Jan Andrzejewski
On 21 October 2017 at 00:04, Marshall Burns <ListMail2_at_fabbers.com
<mailto:ListMail2_at_fabbers.com> > wrote:
Hi folks,
Does anyone know where to find these two original STL files from 1991, or
close replicas?
* The ball in a cage made by Quadrax,
photo at
www.fabbers.com/_file/_/~fabbers/Quadrax_BallInCage.jpg
<http://www.fabbers.com/_file/_/~fabbers/Quadrax_BallInCage.jpg>
* The gear tree (or brain gear) made by Cubital
photo at
www.fabbers.com/_file/_/~fabbers/Cubital_GearTree.jpg
<http://www.fabbers.com/_file/_/~fabbers/Cubital_GearTree.jpg>
There are similar models at Thingverse and some other places, but none of
them is quite like the originals. I want to make a physical replica of one
of them as a gift for a friend.
Thanks if you can help out.
Regards,
Marshall Burns
www.fabbers.com <http://www.fabbers.com>
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