Re: [CAD_CAM_EDM_DRO] Re: CNC Machine for relatively precise wood carving-what would I need?

Wyatt,

I didn't get your original post, and the reply has your email address
truncated, so I can't respond directly to you.

I've built a Stewart Platform (hexapod) 5-axis machine that works quite
well for cutting images and artwork in wood.

If you email me directly, I'd be happy to answer questions.

-- Carl
cmm@...
http://www.foxkid.net

At 09:39 PM 3/4/2003 +0000, you wrote:

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, "wyatt_meng <wyattmeng@h...>"
><wyattmeng@h...> wrote:
> > Hi,
> >
> > First of all, let me say that I'm relatively new to this.
> >
> > I'm trying to build a machine for wood carving. It would have to be
> > able to cut with enough precision to cut an approximate 1mm groove.
> > It would also have to be able to cut 3-dimensionally. What would I
> > need? What would it cost? What would I need in terms of computer
> > controls? Price isn't much of a problem, so I'm open to any
> > suggestions. The work area would have to be about 22" x 16" x 1".
> >
> > Thanks for your time.
>
>Wyatt. There are more qualified persons on the list that can give
>you advice about 3D carving in wood. It sounds however that what you
>want to do is more 2.5D; that you want to route designs into flat
>wood pieces. I gathered that from your 1" Z specification. Have you
>looked at any software design programs? Is your intent more artistic
>(signs, plaques, etc) or mechanical (furniture parts, mold masters,
>etc). For TRUE 3D you need to be considering a 4 or 5 axis machine.
>By telling us what your intended end result is we can give more
>concise advice.
>
>The issue with accuracy has a lot to do with cumulative error and
>repeatability rather than just raw resolution. You can easily build
>a machine that has a resolution of .0001 inch or better but has so
>much backlash and flex that it's lucky to hold .1 inch (or worse).
>Remember that complex wood carving/routing can consist of thousands
>of lines (moves) in g-code and a machine with bad backlash and
>excessive flex will give really poor results. I just finished a
>carving (.65 inch deep in 1" wood) that was 60,000 lines of code. It
>took 4 hours to run on the machine and it only went back to 0,0 three
>times in the whole thing!
>
>I know this did not answer your question, but until we understand
>your end usage any advice is pure speculation.
>
>I responded because I saw no one else did and it's important that new
>members questions get answered. Contact me off list if you want and
>I will take the time to relate my experiences in building and
>programming 3 different hobby CNC machines.
>
>
>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@... [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
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/