The one in my logitech T-BB18 is 35mm. ap
---------------------------------------------------------------------- Andrew J Perrin - http://www.unc.edu/~aperrin Assistant Professor of Sociology, U of North Carolina, Chapel Hill [EMAIL PROTECTED] * 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 > Get my GPG key here: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x21C61F7F > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
