Re: [CAD_CAM_EDM_DRO] Open (i think) design for a parallel robot (reprap may be interested)

Dear Dennis,

Thank you for the tip.
I think we'll start about by making a cartesian robot, i.e. some traditional
mill/gantry/router type thing, and then eventually move over to a Stewart
platform.
http://en.wikipedia.org/wiki/Stewart_platform
(I'm including the above link for the benefit of others. I know you know what
a Stewart platform is.)

The one thing a cartesian robot has going for it is that it's easier to
design, build, control and troubleshoot, because it's conceptually simpler.
(It's something the reprap group discussed briefly some time ago.) Stewart
platforms are harder to figure out, but I think they make more economic use
of materials, require smaller motors, etc.

On the other hand, even someone who's very clever would have trouble building
one in a weekend, like this thing:

http://engadget.com/2006/06/29/how-to-build-your-own-cnc-machine-part-1/
http://engadget.com/2006/06/29/how-to-build-your-own-cnc-machine-part-2/
http://www.engadget.com/2006/07/11/how-to-build-your-own-cnc-machine-part-3/

Once we've got a few reprap units going, we'll think about switching over, and
using those systems to bootstrap a stewart platform.

Still, I'll drop that guy a note.

Regards,
-Sebastien

On Sunday 27 August 2006 16:16, Dennis Schmitz wrote:
> Again with my broken record about the spidery looking parallel robot...
>
> I ran across this website which has what appears to be an open design:

http://www.laboratoryformicroenterprise.org/lme/LaboratoryForMicroEnterprise.html
>
> It hasn't been updated in quite some time, basically because the guy who
> wrote it got a job. In any case, this also appears to be compatible with
> the goals of the reprap project. It seems that this design would be simpler
> to build than a cartesian positioner, and since reprap doesn't require the
> rigidity of a mill, this might be a more versitile design. Judging from the
> stated intent on the website, the author might be willing to donate it to a
> GPL type open license.
>
>
> [Non-text portions of this message have been removed]
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
> timg@... Moderator: pentam@... indigo_red@...
> davemucha@... [Moderators] URL to this group:
> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
> you have trouble. http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> sister site to the CCED group, as many of the same members are there, for
> OT subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
>
>
>