Re: [OT] How big are Logitech's balls?
On (25/03/04 21:31), Andrew Perrin wrote:
> The one in my logitech T-BB18 is 35mm.
>
> ap
>
> 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.
Hi Pigeon
I've got a MS Optical Trackball (one of the best things to come out of MS that
I've used) unfortunately it's RH only. The ball is 38mm.
HTH
Clive
--
http://www.clivemenzies.co.uk
strategies for business
Reply to: