Re: Ball screw cost and sources - Moglice - Phillycast - concrete

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "dcdziner" <Dcdziner@p...>
wrote:

> Dave,
> Let's try a slightly different scenario. Rather than

filling the

> center void with wood, I would use styrofoam, and use it in

rectangles to

> divide the underside into cells. You'll then have structural members
> supporting the underside of the top slab in both directions, and

require a

> thinner top section. In addition, you should add fibers of

monofilament

> polypropylene to the concrete mixture. This is the newest method of
> reinforcing concrete, that's replaced steel mesh. When you get a

little

> closer to pouring concrete, I'll give you instructions on how to

finish the

> slab so it's really flat.
> In the past 20 years, I have placed several million square

feet of

> "superflat" warehouse floor, so a router table should not be a

problem.

>
> Marv Frankel
> Los Angeles

I think the way I have seen kitchen counter tops done is that the
floor is made as the lower mold so if the floor is flat, your end
result will be too.

After posted that part about leaving space for screws behind the
maounts, I thought about putting blocks behind and possibly welding
them in place so that you would have more strenght in a bolt.

and also to install any additional mounting plates for whatever else
one minght need, a rotary table or somesuch.

Dave