Re: Materials for test, foam?

John,

Thank you for the kudo's...

That source isn't necessarily cheap; but it's commercial quality CNC
proofing material.

We can't get that brown foil faced foam anymore at our local big box
stores. But there are 2, 1-1/2" thick sheets above me where I'm
typing<G> Was gonna insulate a roll-up garage door, but never got a
round tuit...

The pink and blue stuff is not carried locally any longer either.
Except at REAL contractor supply places. All we have now from th
ebig boxes is plain white styro with a blue plastic film on one
side. We use it in 1" thickness for packing/shipping the phenolic bb
ply Wood ducks.

The blue stuff is pretty close to what experimental aircraft
builders call "clark foam", and it and the pink stuff work pretty
well for CNc proofing and even some kinds of parts.

BUT! set up a GOOD vacuum or you'll go crazy as that stuff gets
EVERYwhere...

BTW, the foil faced brown stuff is polyisocyanate AIRC. Be careful
breathig its dust. Stuff above me is labelled Johns Manville AP foil
faced foam sheathing.

Hope this helps,

Ballendo

P.S. Get the pink and blue from Aircraft supply places like Wicks
and/or Aircraft spruce and supply.

West Marine may have it as well.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "John Delaney"
<jdelaney2@...> wrote:

>
> >I seem to recal there being some
> > > sort of dense beige foam--I am thinking that I could cut this

at a

> > > higher speed as a test. Does anyone have any suggestions as a
> > > material?
>
> I went ot the local lumber yard (Ganahl Lumber here in So. Cal.)

They

> had some insulatioin board. It is a urethane foam. It has foil on
> both sides which is a pain. The other problem with it is that it
> tends to have voids. It is not square so you gotta square it up.

But,

> it's pretty cheap. I got a 4' x 8' sheet for about $18.00. It's

1.5"

> thick. Made by a company called Rimax.
>
> That source Ballendo put up looks good too, as usual coming

from 'B'.

>
> And, yeah, get a vaccum rigged up. I have a shop vac nozzle right

on

> the cutter and I am still getting some dust around the garage. I
> would also cut a hoover vac bag in half and put it over the vac
> filter so you don't waste vac filters.
>
> But, for proving out my programs it beats cutting metal and

running

> coolant.
>