Re: Inexpensive ACME (lead) screws

McMasterCarr ( http://www.mcmaster.com ) is also be a good place to
try. They have ACME and ball screws/nuts. If you look at ball
screws you'll see there's one size, 5/8" x 13/64" pitch, that only
cost $1.07/inch and the nuts are $20.63 ea. It must be an
automotive size or something that makes it high volume for low
price. The pitch is odd but software doesn't care and the price is
about the same as not so good ACME screws.

Al

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Greg Maxwell"
<greg_susie@y...> wrote:

> I am working on converting an existing manual panagraph engraver to

a

> CNC (2 axis) system. I have a good understanding of the software,
> motors (probably use steppers for low cost), and their associated
> motor drivers. However my problem is in the hardware. I have
> searched a couple websites to get pricing on a x-y manual table

that

> will be controlled with the steppers but they want $1,000's for
> these. I have contemplated buying the lead screws and pillar

blocks

> and building my own x-y table but the cost of the lead screws
> ($100's) seem to make this also overcostly. Is there any surplus
> dealers that can sell lead screws (and bearings) for reasonable

costs

> (i.e. $20-$50)? I have searched ebay for parts but they only have
> 1pcs. I need to match the x & y turn ratios so I don't have to

deal

> with interpolation issues.
>
> Please let me know.
>
> Thanks,
>
> Greg