Re: [CAD_CAM_EDM_DRO] ACME ( was Re: leadscrew, acme screw, threaded rod, ballscrew

Guys,
Trying to use all thread as a way of constant linear movement, makes
no sense at all. All thread is made for hanging things from ceilings,
bracing shelving, and other uses that require zero accuracy. All thread is
usually so rough, it looks like it was cut with a fire axe. Don't even think
about using it, and at least go with acme screws.

Marv Frankel
Los Angeles

----- Original Message -----
From: "David A. Frantz" <wizard@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, May 15, 2003 9:15 AM
Subject: Re: [CAD_CAM_EDM_DRO] ACME ( was Re: leadscrew, acme screw,
threaded rod, ballscrew


> >
> >
> >snipped alot of stuff<<<<<<<<<<<<
> >
> I have to disagree here slightly there is not a huge difference in
> pricing between ACME thredad and all thread. You end up spending a
> greatdeal of money that you wouldn't otherwise spend if you just upgrade
> to the ACME in the first place.
>
> Also there are design points where even the tought of designing for the
> ultimate makes the project impractical. Yes these are often home
> projects but it isn't unheard of in an industrial situation.
>
> So the reality is that the individual has to make due with what he can
> justify. It does not hurt though to understand that ACME screws are
> not that much out of line.
>
> Thanks
> dave
>
> >
> >My advice stays the same. DESIGN with the ultimate in mind (ie:
> >leave the space for it), but TEST with cheap crap(cheap allthread),
> >and INSTALL the best cost/function you can get away with.
> >
> >As a note here, I used some cheap all-thread on a table and found
> >mistakes in the table that would have prevented me from using the
> >ball screws I so desired. the $10.00 for the screw was well worth it.
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
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