Re: Digest for chemshapes_dev@googlegroups.com - 4 Messages in 2 Topics

[Joshua D. Johnson]

All,

       It is fascinating reading the posts here. I have a couple of really precise >.0001" XY carriages here from a scanning microsope that I am dying to use for this project. they are 12" x 12" with probably 6" travels. I have a little machine shop and lots of 80/20 at my disposal.. Where can I contribute? My forte is mechanicals up to mounting motors and basic wiring (I can make simple PCB's)

       Keep up the good work.

                      JOSH

On Tue, Jun 7, 2011 at 9:51 PM, <chemshapes_...@googlegroups.com> wrote:

  Today's Topic Summary

Group: http://groups.google.com/group/chemshapes_dev/topics

• Part size, resolution, and other tid bits. [1 Update]
• 2.5D Printer Concept [3 Updates]

 Topic: Part size, resolution, and other tid bits.

tj <sny...@cfl.rr.com> Jun 07 06:17AM -0700 ^

 
Jon and John
I will definitely look into that.Thats a whole project by itself.The
optic train is extremely sensitive and fragile as far as adjustments
goes,and dont even know if it possible with this lenses.I am not
afraid of hacking it,its just the time.
Coming closer to the end of this project all my ducks are somewhat in
order,so that would be just another issue to create a variable for
(that I don't need to open that can of worms right now) . I have to
get this machine to shape something soon so we can start
troubleshooting everything together.
 
I am on the instalation of all the pc boards and power supplies right
now,and that's way overdue (timewise). I had to master that PCB
etching technique first.That was a thorn in the flesh for a while
now ,but I won !! and the outcome was way above expectations , So our
project is moving again, we are going on! . Read up on it here:
http://www.chemshapes.com/?cat=27
TJ.


 

 Topic: 2.5D Printer Concept

4Ddabbler <dingl...@gmail.com> Jun 06 07:36PM -0700 ^

 
I am in process of getting a suitable chemical brew together. Have the
most fortunate circumstance of convenient local access to a very
knowledgeable chemist who is a resin and polymer specialist who is
willing to talk and idea share to any degree that doesn't directly
interfere with or hamper his business. He and I are consolidating
thoughts and knowledge base to arrive at more sensible cost and
purchase option than Sigma Aldrich etc. for source of the chemical
components. Unfortunately as part of this process we are seeing that
this sort of chemistry and process is not going to be so cut and dry
or wash and wear as Junior and his site and blog are promoting things.
The Sudan dye and most other suitable dyes or chromo-selective photo
initiator are usually toxic and carcinogenic and need to be handled
with caution. The two part monomer brew components are also chemicals
that require caution and sensibility with regards to handling and use
also. There are potential alternatives to use lesser toxic and more
friendly mixtures and such but I am not thoroughly read up or versed
on their actual chemistries and pitfalls or issues as of yet. It is
foreseeable to be able to produce multiple liters volume batches of
the photo initiated or activated resin mixtures for less than couple
hundred dollars when you are able to purchase through access of
commercial sales source routes and there are obviously other
alternative routes on chemistry and composition to still be studied. I
am not so optimistic as to see Mr. Veloso deliver the goods on his
promised offerings and criteria particularly on the polymer or resin
compounds as a viable product for reasons of both economic and safety
issues. I believe that Mr Veloso is going to have to learn some
serious lessons the hard way by trying to do-it-all per say and expect
to market and profit from a proprietary geared business model,
products and activity or distributions scheme. Either he will have to
compromise safety and/or performance somewhere or risk some rather
horrendous lawsuits and pitfalls from materials safety and handling
management issues or he is going to completely piss off or drive away
much or all of his following once the realistic bottom line of costs
and practices is outlined and achieved. I am not deterred or stating
anything to negate or stop anyone's work and progress in this venture.
I am going to plan and proceed with caution and sensibility as to
goals and expectations especially after several conversations and
extensive details analysis with the aforementioned professional career
chemist. It is fully possible and achievable to do some ground
breaking and successful work in a group such as this group and forum
is involved in.


 

tj <sny...@cfl.rr.com> Jun 06 08:23PM -0700 ^

 
4Ddabbler
You are a lucky man to have a chemists experience at your
fingertips,Is there any posibility that he can join our Forum. That
would be so great!
We are in desperate need of a polymer chemists input,
TJ.


 

tj <sny...@cfl.rr.com> Jun 06 08:28PM -0700 ^

 
Nuri
unfortunately it's not that that easy,The chemicals is not that cheap
to ship and some are almost impossible.
If any of you guys can shed more light on this, as far as price
shipping etc. and availability that would be great.
Sigma aldrich is hard to deal with. I found that CYTEC are by far the
best and give out free samples too.
 
tj


 

--

[tj]

Josh , welcome to the forum
These are really a bunch of nice guys with the willingness to help and
brainstorm any problem that comes along ,I am sure we can use you
expertise too .stay tuned..We all have one goal to come up with a good
solution to a 3d modeling printing/shaping with UV chemical
exposure.There are already some machines in the makings and soon one
of us will be able to produce a model.

We are still moving data over from the old website. to ChemShapes.com
so stay tuned

TJ. Snyman.