Re: [CAD_CAM_EDM_DRO] Granite router/mill

HI John;

Believe it or not I was thinking along the same lines a few months
ago. Well atleast with a slightly differrent bent, my thought being
tomb stones from the local tomb stone suplier. Whild not sureface
plates these stones are often nicely sized. A few things have put
this project on hold not the least of which is time and money.

There are only two ways that I see as pratcal in assemlbing such a
machine, one is through bolts the other is cemented in anchors. A few
years ago I had the priviledge to work on some machinery made with cast
"granite". This synthetic material made one hell of a lathe but it is
heavy and granite would be two. The other option seriously floated
was concrete and making your own synthetic granite. Casting an epoxy
machine does have its possibilities. By the way I'm not 100% sure
that the commercial offerings are actually epoxy, the material did seem
to be a bit harder than what I would normally expect from epoxy.

Either way the materials discussed do provide a stable platform for
mechanical integration.

Dave


Dave

John Johnson wrote:

>(Not the Smithy Granite)
>
>I'm wondering about the feasibility of building a router/mill out of
>granite. Specifically, cheap surface plates. They have a lot of mass,
>are inexpensive, and are flat and square, seems ideal. Use one for the
>bed, two for uprights, and one for the cross member of the gantry. I
>wonder how you would attach them together, and how you would attach
>roundways and the like to them?
>
>Comments appreciated.
>
>Regards,
> JJ
>
>
>