RE: [rp-ml] free STL Files and other (free) things we wish for in the new year

From: Marshall Burns <>
Date: Fri Jan 08 2010 - 19:17:44 EET



            I hope you get some good responses to your inquiry about
machining small ABS gears, indeed an important problem.


            I have to disagree with you that in the early 90s we didn’t have
discussions such as the one Adrian Bowyer has been stimulating. If I
remember correctly, there was a steady stream of heated arguments about
where the technology was going, how it would be used, and how it would
affect society. When my book was published in 1993, it included a chapter,
“Economic and Sociological Impact.” Along with sections on the new role of
the customer in manufacturing and on how to get rich from fabricators, there
was my favorite section of the book, “Impact of Automated Fabrication on
Society,” which I later posted in the philosophy section of my personal
website at . I have sometimes wondered if
the musings in that section were part of the reason the Genie Studio Fabber
didn’t get funded!


            The word “money” does not appear there, but the very first
sentence is, “A new technology can change the way people and nations
interact with each other and with their environments, how they acquire goods
and services for survival and betterment, and how they assign value to
various sorts of available goods and services,” which is exactly what the
debate here in the past few days has been about.


            I’ve been delighted with the way Adrian has gone far beyond the
ideas discussed there. More important yet is that Adrian is not just
speaking theoretically, but has put his ideas into a physical product that
he has brought to market, something I did not succeed in doing.


            I do understand that some or many members of this list are only
interested in technical information or economic applications. Please bear
with the rest of us geeks who are also interested in more esoteric aspects
of the field.



Marshall Burns <>







From: [] On Behalf
Of Mullen, John
Sent: Friday, January 08, 2010 07:46
To: José Joaquín Prieto Cruz; G. Sachs;
Subject: RE: [rp-ml] free STL Files and other (free) things we wish for in
the new year


I remember back in the early 1990’s when the RP mailing list was very
vibrant and informative with issues related to Rapid Prototyping. If you
saw a new rpml email come through, you read it and many times learned
something. There was none of this ranting we’ve seen recently and just
hitting the delete key as the messages come in.


Are we all just the old timers left on this list? Where have the young
bloods gone? Blogs?.......Twitter?.....other lists?


The recent political rants need to move onto to a chat line please and off
the rpml.


This is still a very dynamic industry, with so many things changing in
hardware, software, materials, processes, etc. each month and year. I
would like to hear about it and learn something.


Here’s what’s on my mind this morning……….


Is there someone out there who can actually RP small, usable gears for me?
I’d love to move away from machining numerous ABS gears for our electronic
“works like” prototype models. Anyone have some success? We do create RP
gears in a variety of technologies, but they all suffer from one issue or
another such as initial material strength, inaccuracies, material breakdown.
After the design is proven we machine custom gears. I don’t need a very long
life for these typically a couple of months tops, just a quite, smooth
running gear. As always timing is an issue. It’s asking a lot but it’s my
Holy Grail.


Someone inspire me again….teach me something please.



John Mullen

Rapid Prototype Manager

Hasbro, Inc.

1027 Newport Avenue 401.727.5194

Pawtucket, RI 02862


Received on Fri Jan 08 19:13:26 2010

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