Hound MKII After Comp Teardown

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Organized Chaos

2 жыл бұрын

Come along with me as I take apart and examine my robot after a competition at Texas A&M.

Пікірлер: 17

@bami2 2 жыл бұрын

Amazing design

@logandavis1495 2 жыл бұрын

It was super cool seeing this thing at the TX aimbots event. This new design broke my brain for a second.

@LukeQuin 2 жыл бұрын

That's so cool! Counter rotator on the weapon shaft is really clever.

@Chaos_Organized 2 жыл бұрын

Thanks

@TeamJunkYardDog 2 жыл бұрын

We use HDPE as well and love the prong nut idea. Awesome bot!

@DrachenJager1 2 жыл бұрын

Prong nuts, tee nuts, rivnuts, and threaded insert nuts all work great, I use a lot of HDPE/UHMW and find each has a place.

@Dangineering 2 жыл бұрын

Oh my god we almost did the same exact thing! I have a teardown coming out in a couple weeks. Super interesting how we had different design choices to get more or less the same end product.

@Chaos_Organized 2 жыл бұрын

I'll keep an eye out for your video!

@LukeQuin 2 жыл бұрын

For V3 can you put a hub motor in the weapon :)

@Chaos_Organized 2 жыл бұрын

I would like to, but have not come up with a hub motor design I like. Any recommendations? I don't have a ton of machining capability.

@ryanclingman9053 2 жыл бұрын

I'm looking at how you structured the drive modules to see what concepts I could use to improve my own designs. One aspect you glossed over was how you constrained the drive motors without any fasteners. From the little bit you waved it in front of the camera, am I correct in guessing that you added something like a 3D printed key that screws onto the front plate of the gearbox, and then that key is used to constrain the motor in the drive housing and against the inner frame?

@Chaos_Organized 2 жыл бұрын

You are exactly correct! If you need any more info I can get you my discord ID.

@cornmaized 2 жыл бұрын

As always for you crazy compact and unique! Love seeing some HDPE here in the states, the prong nut usage was really creative! will definitely try them out on TPU, the drive pods are totally awesome. The new counter gyro is somehow *even more* innovative than MK 1 hound, and let’s be honest, a lot more sane, that said, I will miss that compact little hunch back, what do you plan on doing with it? It seems basically complete still. Also have you considered PTFE tubing instead of brushings on the drive? If your starved for weight that could save a little!

@Chaos_Organized 2 жыл бұрын

Thanks! Mk1 hound is going to hang out a bit longer for rumbles or a backup for friends until i run out of spare parts. I was considering selling it but it has too many quirks for me to feel like someone else could take it over. Ptfe for the drive is a good idea, I could buy longer tube then cut it to length, every gram counts!

@LukeQuin 2 жыл бұрын

So I’ve been thinking about this some more. Could thin section bearings rpm rating be a limiting issue when scaling up to bigger robots? The counter rotator bearing is essential spinning 2x the speed. Big thin section bearings could be rated for a less than 5k rpm which kind of defeats the purpose of a high speed anti gyro

@DrachenJager1 2 жыл бұрын

Combat robotics usually pushes any kind of bearing well beyond it's rated speeds and loads. The thing is most of these parts are rated for long-term continuous use with the expectation that they won't have to be replaced more than once every few years. In a combat robot, they're used in 3 minute increments and can be replaced if necessary between matches. Same goes for almost every part on bots, when brushed motors were still common, most builders would run them at 1.5-2x the rated voltage and they'd last just fine.

@Chaos_Organized 2 жыл бұрын

From what I hear, If you run them well under their rated load and replace the grease with light oil usually they are fine. I'm running these well over their rated speed even in my 3lb application