Re: Re[2]: [ATM] Use of bearings in (static) mirror cells

["matt" <electro_optic@bellsouth.net>]

now that's a new one, friction allegedly being a linear function of
velocity!
would you happen to have any references for it ? ;-)

thanks,
matt

-----Original Message-----
From: Richard <cnc@cncservo.co.uk>
To: Don Clement <atm@atmlist.net>
Date: Wednesday, April 20, 2005 7:24 AM
Subject: Re[2]: [ATM] Use of bearings in (static) mirror cells


>Hi Don,
>
>Wednesday, April 20, 2005, 4:43:21 AM, you wrote:
>
>DC> Stiction is not friction. Stiction is the change in friction wrt change
in
>DC> velocity
>
>Erm... no it isn't!
>
>Stiction is the static part of friction, ie the force
>at zero velocity that has to be overcome to make the object
>move. And yes, flexture has no stiction. The confusion arises
>because people think it comes from 'sticky' but it doesn't, it
>comes from 'STatic frICTION'
>
>Frictional force, F = a + k.V
>where V is velocity
>
>a = stiction
>k = coefficient of sliding friction.
>
>Any change in 'k' with velocity (ie higher terms) have nothing
>to do with stiction, just the possible non linear behave of
>friction.
>
>--
>
>Best regards,
> Richard
>
>
>
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>

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