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Jeff,

I would agree with Erich and Cory.... however, Happ Trackballs use the  
"gravity thing" for the ball to evenly make contact with the  
receptors. They should be mounted horizontally to work properly.  I've  
seen quite a few exhibits with trackballs mounted perpendicular or on  
an angle and then hear people trash Happ.

Could this be your challenge?

Regards,
Dave Watkins
VisitXplore
216-287-7822

On Sep 17, 2009, at 11:10 AM, Erich Rose wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology  
> Centers
> Incorporated, a worldwide network of science museums and related  
> institutions.
> *****************************************************************************
>
> I agree that Happ would be my first choice.  Recently I spec'd  a  
> couple of their USB-ready smaller balls. They came in a pretty blue  
> too. But they have not been on the floor long so I can't testify to  
> them yet.
>
> Years ago I remember a few attempts to fit "computer" track balls  
> into exhibits. All were disasters. Happ builds products for game  
> arcades. One of the few environments as tough as our museums.   
> Possibly they got a bad batch. But everything I have used from  
> Happ(buttons, balls, lamps) has always been good.
>
> There are still folks who are gun-shy of touchscreens because of the  
> earlier history of not being durable and always going out of whack.  
> But now you can pretty much count on them being totally plug and play.
>
> --
> Erich Rose
> Exhibit, Environmental and Industrial Design
> 807 The Living End
> Austin, TX 78746
> 512-626-9930; [log in to unmask]
>
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