Re: [CAD_CAM_EDM_DRO] Re: Materials for machines. Was MDF for machines

We have tiled roofs. The slate matches the beautiful grey sky we get. :)
I've seen sieves that hold back more water than our garage's asphault roof!
You ought to see it when it really rains.

John H.

> Hi, Ballendo,
>
> Yes, that is the name of the product I used to use. I think with a grid
> supporting it, this would make a good surface for a router table. I am
> pretty sure it is cheaper than many of the alternatives that have been
> suggested, and it is not affected by moisture. Can any signmakers on the
> list tell the list what they might be able to get half inch sheets for? I
> don't need any myself, but I think highly of this alternative, and would
> reccomend it.
>
> Different people choose building materials for many different reasons.

East

> of the Mississippi River most people prefer to have a home with asphalt
> shingles. They last from 15-20 years roughly. I have heard that in

Europe,

> they would not think of building a house with a roof that would only last
> 15-20 years. They would say we are crazy. Many homes in Europe are
> hundreds of years old. I have heard that in Japan, many buildings are

torn

> down and replaced every 15-20 years. I don't really know if this is true

or

> not. It wouldn't surprise me at all to hear a person with a European
> background wanting to use only Cast Iron for a machine, and a person from
> Japan being happy to use aluminum or lightweight metal. I would not say
> either of them are CRAZY for the choices they make. People's motives are
> usually more complicated than we think, and often when we get to know a
> person better, we are not as apt to think of their perspective on any
> particular issue as so unreasonable that we would describe them as crazy.
>
> Thanks,
>
> Tom E.
>
> ---- Original Message -----
> From: <ballendo@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, June 28, 2001 10:39 PM
> Subject: [CAD_CAM_EDM_DRO] Re: Materials for machines. Was MDF for

machines

>
>
> > Hello,
> >
> > Sintra is one trademark name of an EXPANDED PVC foam that sign makers
> > use...
> >
> > Hope this helps.
> >
> > Ballendo
> >
> > --- In CAD_CAM_EDM_DRO@y..., "Tom Eldredge" <harmonyt@r...> wrote:
> > > Signmakers use white pvc sheets a lot, sold under different names.
> > A half
> > > inch sheet of pvc that signmakers use would be a very versatile and
> > > available material for things like router tables. I have used this
> > stuff for
> > > signs I have made, but I forget the names it is sold under. Don't
> > remember
> > > much expasion problems with pvc. Signmakers?
> > >
> > > Tom E.
> > >
> > > ----- Original Message -----
> > > From: Tom Murray <thomasm923@a...>
> > > To: <CAD_CAM_EDM_DRO@y...>
> > > Sent: Wednesday, June 27, 2001 9:38 PM
> > > Subject: [CAD_CAM_EDM_DRO] Re: Materials for machines. Was MDF for
> > machines
> > >
> > >
> > > > --- In CAD_CAM_EDM_DRO@y..., ballendo@y... wrote:
> > > > > P.P.S. Another possibility is a "chemical grade" sheet plastic.
> > > > Don't
> > > > > use plain polycarbonate(Lexan, Tuffek are two trade names), as
> > the
> > > > > hydrocarbons of the dielectric will weaken and "craze" it...
> > > > Acrylic
> > > > > might also work, and PVC sheet seems a (good)possible
> > alternative.
> > > > >
> > > > > I suspect that the plastic alternative panels will not have
> > > > > the "stiffness" of the trespa or phenolic, so consider this when
> > > > you
> > > > > are deciding.
> > > >
> > > > PVC is a pretty good choice in regards to chemical resistance,
> > > > however a good plastic to consider is Delrin (also known as
> > Acetal).
> > > > From what I've seen it is pretty stiff and it is resistant to a
> > lot
> > > > of chemicals. Another plus - it is relatively inexpensive. I can
> > > > check on it's resistance to dielectric fluid if someone can tell
> > me
> > > > what is in it.
> > > >
> > > > -Tom Murray
> > > >
> > > >
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