[ZZII 527]

Originally Posted by AdamHeard

Well, we thought we had the problem fixed (read above) by the steel gears, anti twist plates and reducing the input sprocket size to reduce the stress on the gearboxes.


They totally, totally failed today. We had some other minor issues, but none like that.


Luckily, during the fix-it window we machined new motor mounts that will use the A-M planetarys with small CIMs.

The only three matches we were working in were against 330, then 254 and then 968. After that we were working awesomely on the practice field. Then... total failure.

Our drivetrain is still working great luckily and we play great defense, since we are currently ranked 52nd, we're hoping some of the top alliances realise our defensive abilities.

slightly off topic, but it's been a long day.

Do not use the high reduction BB gearboxes, especially if there is any significant shock load.

That really, really stinks. I have been pulling for these little gearboxes, but I haven't heard any good stories recently. Could you elaborate on the nature of the failure? (Was it the double-D, the twising, the shearing of gear teeth, or all of the above?) My current thinking is that we will continue to use the softer-than-usual plates and just monitor the backlash carefully. At least it is a slow failure mode and I have an idea of how much the plates can handle. If I put in harder ones, it may just doom the next weakest link, whatever that is. Sigh...

Sorry to hear about it and I hope your AM solution works out.