BattleBots Returns...

Man sieht ja wie das funktioniert hat...

Quote from Malice

The Tantrum Fight Breakdown: The one hit knockout!

Tantrum rushed across the box as we spun up and BAM one big hit then…. Nothing? But hey, our belt stayed on this time.

So, what happened?

Our motor controller burnt up because the bearing exploded and caused a massive energy spike!

During the first hit, the massive energy between Tantrum's smashing blade and our blade contacting caused our bearing to disintegrate. The excess energy had to go somewhere and caused feedback to the VEX BB speed controller blowing it up.

Malice runs an ME0909 Motor to power our Weapon, this is a massive motor that runs on 12S and 600amp+ peak. There are very limited motor controller options to get something that massive moving a weapon as heavy as ours. There’s the old reliable contactors,

the Trampa VESC and the Vex BB ESC.

Contactors and why we didn’t use them: Contactors are great for the old batteries that didn’t have the capacity to dump all their amperage all at once. Since we run lipos, if we used a contactor, we would have our batteries dump their amps and catch on fire (see Tombstones fight against Shrederator for what happens when you use Lipos with Contactors)

Trampa VESC and why we didn’t use it: The trampa vesc is a great ESC for brushless motors, but when it’s used in brushed mode (what we need for the ME0909) use a very reduced current, and the spin up time is ATROCIOUS.

Vex BB and why we used it: The Vex BB seemed like our best option because it had been shown reliable by robots like Bite Force. We thought this tantrum fight failure was caused by a faulty Vex BB as we had purchased some used ones and sometimes those can be sketchy.

The diagnosis after our tantrum fight: YAY OUR WEAPON BELT STAYED ON! Sure, our Vex BB failed, but we’ll replace it with a Brand New one and see if that does better in our next fight! The rest of the robot looks great and held up well, hopefully, we stay spinning next time!

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Quote from Mad Catter

MADCATTER VS YETI SPOILERS!!! This year we upgraded to three big weapon motors, but before the fight we were struggling with our weapon motor gears. The gears on the motors were sliding off because the set screws weren’t holding strong enough. The misaligned gears combined with the amount of power the motors were putting out broke some gear teeth causing a chain reaction breaking all the other gears with it. To solve it for the fight coming up in the next few hours, we welded the gears onto the motor shafts. Luckily it worked great for the fight!

We got a nice gouge in our weapon tooth from hitting yeti but that was easily filled with some hard face welding. The only thing that broke on the weapon were the bearings. This would have completely seized up our weapon last year, but our new weapon motors just powered through like it was nothing!

We also tried a new drivetrain with six motors instead of last years four. It drives amazing with all that power. However, we were making use of the same motors we’ve run since battlebots 2019, so they’ve all seen 3 seasons of wear already. All our motors were very tired and it showed in this match. 5 out of 6 motors had broken shafts, bent shafts broken magnets, bad sensors, or wobbly bells, or a combination of those issues. At the end of the fight we couldn’t accelerate or turn like we could at the start. We could do victory circles really well though! (That was the only direction we could turn by the end )

For the next fight, we Frankensteined together the good parts of our remaining motors, epoxied all the magnets in place, made new motor shafts, and supported the motor shafts better in the frame.

Thanks to our sponsors @sendcutsend botkits, Monterey machine products, and Mt SAC! #battlebots #madcatter #combatrobots #robots

Mad Catter hatte eine große pit area zusammen mit Big Dill, entsprechend habe ich einige Zeit bei denen verbracht. Ich kann auf jeden Fall bestätigen, dass Calvin über die alten Motoren geflucht hat. Nach seinem Sieg bei Norwalk Havok hätte er immerhin Budget für Neue