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Unread 05-02-2007, 10:47
WaterFreak WaterFreak is offline
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FRC #0708 (Hardwired Fusion)
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Join Date: Feb 2007
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Location: Warrington, PA
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Re: BaneBots Gearbox Locking UP

We had a similar problem this weekend and after a complete teardown of the tranny, discovered WHAT the problem was.

What we discovered was that TILTING the tranny (or the robot for that matter) may cause one of the planetary gears to slide down the pin it is mounted on and get JAMMED between the ring that is used to mount the tranny to the adapter (the one with the 6 little allen key screws). This does NOT happen everytime you tilt the tranny, only if the planetary gear happens to stop in the right spot (not sure what the tolerance on getting "lucky" is).

I wish I had the pictures we took, am working on that now.

We have our lead mechanical working on creating a spacer to put between the planetary gears and the 2-stage gear to prevent any of the planetary gears from dropping down and jamming.

Other than a spacer of some type, not sure if there is any other solution. I am also not certain if BaneBots or FIRST is aware of this second issue (it ONLY affects the 2 CIM adapter). You can certainly NOT guarantee that your robot will not tip over :-(

As soon as I can get the pictures, will post them.