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Are Trackballs supposed to jump?

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RayB:
Maybe the bearings aren't quite as "free" as they should be...
Soak them in AeroKroil. Lube them with 3 in 1. Spin them with a drill.

heh.

Also check the springs underneath the bearings. (I dunno if yours has those, but in a Wico there are small springs). THese springs help keep the ball as close to the opening as possible, without it really rubbing against it. If those springs are compacted, then your gap will be a bit bigger than it should be, allowing the ball to jump up.

Stingray:
I have the same trackball that you have and mine does not do what you describe.

-S

SirPoonga:
I suggest looking into getting new rollers and bearings.  My happs did that for abit until I replaced the rollers and bearings.

u_rebelscum:
I agree, the most likely problems are not good bearings, and worn rollers.  Open up the case (four screws on bottom) and take a look.

TheRealBobRoberts bearings how-to
TheRealBobRoberts trackball basics (including pics of good and bad rollers)

Bob has replacement bearings and rollers for betsons, which are different from happs.

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