Re: [CAD_CAM_EDM_DRO] How Would You Design question

Tim,

Would it also be worth considering a "plane" arrangement where you
eliminate the saw completely and basically just pass a 4"(actually a bit
wider than your maximum work block) wide plane blade over the block.
The blade would need to be rigidly mounted and on rails - kind of like a
railway bogey which has a software controlled height control.

I'm sure this would work at the .050" thicknesses but would probably
fail at .200" due to the thickness of the blade. If it could be made to
work - you would get a lot more yield from a block and no sawdust...
Obviously the blade would have to be rigidly mounted.

Cheers, Peter

Tim Goldstein wrote:

> Been thinking about creating a specific purpose CNC machine and thought it
> would be help to see how some of you would attack the problem. The question
> revolves complete around the mechanical design of the equipment and does not
> at all consider the electrical or software from the motors to the computer.
>
> Here are the design parameters:
> 1) The machine will be single purpose to cut sheets of wood off of blocks
> with a maximum dimension of 3" x 4" x 37"
> 2) The resulting sheets need to be consistent in thickness over the lenght
> of the sheet + - .0025
> 3) The thinnest sheets cut will be .050" and the thickest will be .200"
> 4) The cutting motion travel will need to be in the speed range of 20 - 60
> ipm with a rapid backfeed in the 200+ ipm range.
> 5) The actual cutting equipment will be a high end table saw with very good
> bearings so that the spindle rigidity, run out, etc do not need to be part
> of the design discussion
> 6) The designed mechinism has to fit on and be compatable with a high
> quality table saw
> 7) The mechanical portion of the design (not including motors, the base saw,
> electronics, or software) should be able to be constructed for about $500
> 8) Specifying expensive components that are commonly able to be found in the
> surplus market to meet the cost goal of #7 is acceptable.
>
> I think that pretty well lays out the general requirements I am trying to
> meet. Look forward to the various ideas that everyone may have on how to
> accomplish this. I have some ideas in mind and it will be interesting to see
> if they are consistent with the group consenses.
>
> Tim
> [Denver, CO]
> http://www.KTMarketing.com/CNC.html
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> 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 as 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.
>
>
>
> 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@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>