Re: [CAD_CAM_EDM_DRO] Router - Cutting Thin Sheet Clamping??

Todd,

For small parts, once the vacuum system has held it down, you will need to
add tabs to the small parts so that they do not come loose. Vacuum systems
are not very good for small parts.

Commercial system use a high flow vacuum system that will suck through a
sheet of MDF and hold down the sheet that you are going to cut. The bit will
go through the part and slightly into the sheet of MDF. This work very well
for large pieces (12" by 12" or larger). In your case you can use tabs
placed so that the parts never get cut all the way out. You can then go back
and cut the tabs off by hand.

Bob Campbell
http://www.campbelldesigns.com
Breakout Boards
VisualMill 5.0 basic
Stepper motors
Plasma Torch Height, THC 300 boards

----- Original Message -----
From: "Les Newell" <lesnewell@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, February 05, 2004 10:55 AM
Subject: Re: [CAD_CAM_EDM_DRO] Router - Cutting Thin Sheet Clamping??


> The way I used to do this was to use a thin porous sheet over the vacuum
> table. This sheet was simply thrown away when it got too cut up. The
> stuff I used came from a shoe manufacturer and was meant for insoles.
> If you have a good vacuum you can sometimes use thin MDF as the
> sacrificial sheet.
>
> Les
>
>
> Todd Meidinger wrote:
> > I am building my first CNC wood router mainly for cutting model
> > aircraft parts out of 4mm coroplast and thin Balsa Wood (1/16 to
> > 1/8" Thk) and maybe upto 1/4" Ply.
> >
> > I plan on a vacuum hold down system.
> >
> > My question is how can I fixture this material so that I can cut
> > through the entire thickness without destroying my table? I am sure
> > there are lots of people doing this.
> >
> > Thanks for any suggestions.
> >
> >
> >
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> Addresses:
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> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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> 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
>
>
>
>