Re: [CAD_CAM_EDM_DRO] re:Re: RE:Re: Re: no thrust bearing - simple design ?

At 10:21 PM 4/22/03 -0700, you wrote:

>Hoyt, load stiffening is a very common phenomena. I wasn't talked about
>elastic stiffness of a differential unit of volume but rather the stiffnes
>of a long screw or rod.

Stiffness is a material characteristic and it isn't affected by preload, in
tension or compression. Sorry if that sounds anal, but I was trained in
science and worked in a testing environment. What you are describing is in
fact simple preload, which does have the effects you described. All I want
you to do is be aware of the distinction, so next time someone like me
won't see that error, and he won't have to chime in.

>enough tension on the rod will prevent it from going into compression, thus
>it will be stiffened.

Preloaded. HAGO.

Regards, Hoyt McKagen


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