Re: tensioned ballscrew

Doug,

Hadn't seen this post when I asked your traverse speed...

So you're planning for 500ipm?

Okay, so what's the cost of a "not-cheap" ballnut, compared to the
time, effort, materials, etc. of the traveling supports?

Ballendo

P.S. Is this a ground or rolled screw? Are you using one or two?

--- In CAD_CAM_EDM_DRO@y..., "Doug Harrison" <prototype@c...> wrote:
> ----- Original Message -----
> From: ballendo <ballendo@y...>
> > Sounds like a lot of work, especially when there's a simple,
proven,
> > often-used solution.
> >
> > Spin the nut.
>
> I was going in this direction until I came to the same conclusions
that Les
> outlined. Cheap ballnuts are not made to spin at 2000rpm. These
are six
> inches long with square bodies and external return tubes.
>
> Rotating nuts are still in the back-up plan. So are rack and
pinion.
>
> Doug