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

[Richard <cnc@cncservo.co.uk>]

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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