Re: [OT] How big are Logitech's balls?
The one in my logitech T-BB18 is 35mm.
ap
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Andrew J Perrin - http://www.unc.edu/~aperrin
Assistant Professor of Sociology, U of North Carolina, Chapel Hill
clists@perrin.socsci.unc.edu * andrew_perrin (at) unc.edu
On Fri, 26 Mar 2004, Pigeon wrote:
> Logitech do some rather neat optical trackballs, called "Marble", with
> a speckledy ball to give the optical sensor something to work on.
>
> Unfortunately they are all very decidedly asymmetrical and
> right-handed only.
>
> I have a Trust Ami Track trackball, which is sensibly designed: it is
> bilaterally symmetrical and equally suitable for right- or left-handed
> use. Unfortunately it uses mechanical pickup, with the attendant
> disadvantage of picking up finger grease which causes it to stop
> working.
>
> So I've whacked an optical sensor in it, and speckled the ball by hand
> with a felt pen. This took ages, and sooner or later I'm afraid the
> speckles are going to wear off. No doubt the Logitech speckled balls
> are more durably marked, so it would be worth my while to get a
> Logitech optical trackball just for the ball, as long as it's the
> right size.
>
> If anyone on the list has one of the Logitech devices, could you
> please measure the diameter of the ball and let me know? Please be as
> accurate as you can. The Trust needs a 40mm diameter ball; the
> tolerance is something around +/-0.5mm.
>
> TIA,
>
> --
> Pigeon
>
> Be kind to pigeons
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>
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