AndyMark CIMple Box Stripped Out

[MrForbes]

They do need periodic lubrication....

Other possible problems are loose screws, or the key falling out

[Richard Wallace]

Originally Posted by squirrel

They do need periodic lubrication....

Other possible problems are loose screws, or the key falling out

The sudden failure described suggests that squirrel is on the right track there.

Did you disassemble and inspect yet, and if so what did you find?

[Madison]

If it locked up, it's unlikely that the teeth are stripped away.

[Adrian Clark]

If you stripped a gearset you would be having the exact opposite of the problem you described. If it's locked up it's probably because a set screw or keyway has come loose inside the gearbox, as mentioned before.

Have you disassembled the gearbox yet? You'll get much more information from the gearbox itself than you will from a bunch of CD'ers trying diagnose your problem based off of one symptom.

Edit: In hindsight it was probably the external self-locking retaining ring popping off the CIM shaft and getting jammed between the gears. But if there was a grinding sound beforehand then you might have larger problems.

[BobbyVanNess]

Originally Posted by Richard

The sudden failure described suggests that squirrel is on the right track there.

Did you disassemble and inspect yet, and if so what did you find?

We havent disassembled it yet, we've scheduled to fix it later this week back at the school. I'll post what it was once we confirm the problem.

[JVN]

So your gearbox failed, and your first course of action was to post about it CD?

This is an interesting failure recovery plan.
Opening it up is probably a good next step.

-John

[Garret]

We had this same thing happen to us just after the fall classic in 2011 with our back left drive gear box. Ended up that the teeth on the large gear had worn away and one of them had failed. Pretty sure the issue was the we didn't grease it enough during the season and we drove that robot pretty hard.