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 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
