re:defiance vmc wasRe: Re: wrong conversion factor ...

I built a CNC router out of 80/20 Aluminum extrusion and
while it works great, I was planning to fill the extrusions with
a morter mix consisting of portland cement, sand, and some pea
sized gravel to add some more rigidity. Anyone ever done this?
Would the sand/epoxy mix be a better choice?

Bill

--- In CAD_CAM_EDM_DRO@egroups.com, "Smoke" <Smoke@5...> wrote:
> Maybe, maybe not. I've done this little trick before....mix dry
sand with
> the epoxy. Mix in as much sand as you possibly can and then some.
It
> doesn't really take much epoxy to bind an awful lot of sand. Use
slow
> setting epoxy and you'll have plenty of time for mixing the sand
....as well
> as getting tired arms. You could possibly fill the cavities nearly
full and
> then add a layer of epoxy/sand mix to complete the fill. That
would
save on
> epoxy too.
>
> Smoke.
>
> >I think you will find the epoxy is VERY expensive, if you are
trying to
> fill
> >up cavities in castings or extrusions. The epoxy will probably
cost
> several
> >times the cost of the finished casting or extrusion!
> >
> >Jon
> >
> >
>