On 1/26/2011 9:07 AM, keith gutshall wrote:
>
> Hi Ron
> Â Some time back I built a lathe with a wood base,it worked good.
> Â But it had it shortcomeings,one day it worked fine ,the next day it was
> funcky.
> Â I guess the humidity in the Florida Panhadle made it swell and shrink.
> Â
> Â Keith
>
> Deep Run Portage
> Back Shop
> " The Lizard Works"
>
> --- On Tue, 1/25/11, Ron Thompson <ron@ourcadguy.com
> <mailto:ron%40ourcadguy.com>> wrote:
>
> From: Ron Thompson <ron@ourcadguy.com <mailto:ron%40ourcadguy.com>>
> Subject: Re: [gingery_machines] Re: new article: How Accurate is Your
> Micrometer?
> To: gingery_machines@yahoogroups.com
> <mailto:gingery_machines%40yahoogroups.com>
> Date: Tuesday, January 25, 2011, 8:27 AM
>
> Â
>
> On 1/25/2011 9:01 AM, Rick Sparber wrote:
> >
> > Shannon,
> >
> > You ask a very good question that has no answer. It is sort of like
> > beauty.
> >
> > I know people that define accurate as better than 1/8" while others
> > that define it as better than 0.0001". I try to talk about getting the
> > best possible accuracy rather than an absolute number.
> >
> > Rick
> >
> >
> >
>
> I took a 2 year machine shop course at a local college. One of the
> things I learned was to take my expectation of accuracy from 1/8" to
> .001".
> In woodworking, 1/8" is acceptable and you can't get much more accurate
> because wood changes with humidity. Metal, not so much.
>
> I tried making wooden stuff to a higher standard, but was dismayed when
> it stopped working due to swelling. Tolerance and clearance do not mean
> the same thing.
>
> --
>
> Ron Thompson
> On the Beautiful Florida Space Coast, right beside the Kennedy Space
> Center, USA
>
> There are two kinds of posts on newsgroups.
> 1. This is what I have done...
> 2. This is what I think...
> Be aware of the difference!
>
> http://www.ourcadguy.com/
>
> http://www.plansandprojects.com My hobby pages are here:
> http://www.plansandprojects.com/My%20Machines/
>
> Visit the castinghobby FAQ:
> http://castinghobbyfaq.bareboogerhost.com/
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
Sound right to me. I went to that college not too far from you. It is in
Gautier, MS. (pronounced Go-Shay) on the gulf coast. Very humid.
--
Ron Thompson
On the Beautiful Florida Space Coast, right beside the Kennedy Space Center, USA
There are two kinds of posts on newsgroups.
1. This is what I have done...
2. This is what I think...
Be aware of the difference!
http://www.ourcadguy.com/
http://www.plansandprojects.com My hobby pages are here:
http://www.plansandprojects.com/My%20Machines/
Visit the castinghobby FAQ:
http://castinghobbyfaq.bareboogerhost.com/
[Non-text portions of this message have been removed]
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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