Re: pic: Wheel problem.
 

we havent had this problem yet but i have heard of some other teams with the same problem...they said it was from the carpet to the playing surface but i am not entirly sure!
Good luck,
Alicia Albrecht
Electrical Subteam
The Robettes 2177

Re: pic: Wheel problem.
 

The wheel hubs are sized for #8 screws. Did you drill them out before you tapped them for the #10's? If not, you could have stressed the plastic when you used the tapping tool to create your threads.

Re: pic: Wheel problem.
 

This is the link to the AndyMark Cad file, which clearly shows the sprocket mounting holes to be 3/16" (.1895).

http://lib.store.yahoo.net/lib/yhst-...lick-Wheel.pdf

The tap size for a 10-32 is about 5/32" (75% thread clearance), clearly smaller than the existing hole in the wheel. It would seen to be far better to open the hole slightly for the #10 bolts to go through, and jamb nut the bolt/sprocket /wheel assembly together. #8 bolts would be too sloppy in the existing holes (maj. diam. of .164"). :)

Re: pic: Wheel problem.
 

:) Checked the wheel mounting hole size last night on a wheel, and they are definitely NOT sized with a 10-32 or 10-24 tap hole. An 8-32 clearance hole is about right, but a little more sloppy than I would normally like. If you keep your sprocket and spacers centered on the wheel hub, the 8-32 bolts should work fine, and you will eliminate sprocket runout. Sorry for my previous post, but I even checked with A/M and was assured the CAD drawing was correct a 3/16".

Re: pic: Wheel problem.
 

Did you ask someone at AndyMark to try to push a 10-32 screw through the hole in a wheel? :)