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

> Last ditch effort... place fixtures in the concrete that the rails
> simply bolt to. Then align the rails in typical fashion after

concrete

> is hard.
>
> If it truly is a first effort though, forget the concrete.... Just

get

> something running. The first attempt usually leaves much to be
> re-engineered on "the next one".
>

I would think that for a first attempt, I would take a couple pieces
of steel channel, fill the center void with some bits of wood, then
pour the table. the wood would allow you to drill and tap the steel
and the mass would offer stability.

but the very first attempt using concrete would seem like a stretch.
I have all the pieces for a small 8" x 12" work envelope from a
single 4' x 8' sheet of 3/4 MDF.

runners and leadscrws for a small wood router would let one get some
experiance in the subtleties of all the various features.

then tackling the metal milling unit would be done with experiacne
and confidence.

Dave