Antweight Drive Motor Investigation

Рет қаралды 11,974

Күн бұрын

At my last two tournaments, my antweight combat robot "Cheesecake" frequently lost one or both of its drive motors without taking very much damage. I decided to try and fix this.
Cheesecake:
www.robotcombatevents.com/gro...
Strikes Twice:
www.robotcombatevents.com/gro...
SAAS Robot Rumble:
www.robotcombatevents.com/eve...
0:00 - The problem
0:27 - Gearbox investigation
0:57 - Impact to the gearbox
1:32 - My solution
1:54 - SAAS Robot Rumble 2022
2:21 - Cheesecake vs. Strikes Twice
3:33 - Fight analysis
4:38 - Fight 1
5:00 - Fight 2
5:32 - Fight 3
7:38 - Fight 3 analysis
7:59 - Conclusion

Пікірлер: 29

@camdenm Жыл бұрын

you're too kind, that was a close fight all things considered. And for the record, I was trying to push you off the wall, but a hit you got earlier on my left drive gearbox knocked the motor loose, so it was working intermittently, making it incredibly difficult to drive half the time for the rest of the tournament!

@alexsalchemy Жыл бұрын

Oh dang, I had no idea! Thanks for the great fight!

@Austinfromcorncountry Жыл бұрын

Love the TPU spokes solution and the clips of all the fights! I think TPU is one of the most underrated filaments. And by lowering the diameter of your wheels, you probably will gain some more control and maybe some more torque.

@TheZombieSaints Жыл бұрын

You're totally right! Tpu is near damn indestructible. I sell printed stuff at the markets and I have a tpu one and I say to kids "if you can break it you can have another one"... I still haven't given one away yet 😂

@JustCuzRobotics Жыл бұрын

This is a great video, very well edited and presented! I'm glad to see more combat Robotics channels popping up that actually put in the effort to make original content about building and improving robots. Squishy and compliant wheels are a good solution to this problem. TPU wheel hubs are super popular in beetles for the same reason. I would also recommend making the wheel hubs as close to the face of the motor as possible to reduce the bending load on the shaft/output bushing or bearing or whatever it is for silver sparks.

@matts1166 Жыл бұрын

I've been using the same Fingertech 11:1 motors on my bot (aproximately 30mm tall wheels) since 2019 and never had to change them. I've had 17 matches. Here in the Midwest we've gotten a reputation for some major hitters. I've bee slammed into the ceiling, Thrown into walls, and gotten into major pushing matches. I think part of why I survive is the small diameter of the wheels. It will limit the leverage concerning lateral twisting of the axel.

@alexsalchemy Жыл бұрын

You're probably right. Thanks for the information!

@chriscapps206 Жыл бұрын

That’s amazing glad it worked,can’t wait to see it throw down at Mechanical mayhem hopefully in January! Now question how would you think that’d work for a beetle now? This could be something useful to use on power surge

@alexsalchemy Жыл бұрын

You know, it just might work for a beetle, but don't quote me on that; I've never built or even driven a beetle, so I don't know anything. All I know is that I'm going the Hypershock route of simply shock-mounting everything.

@TheZombieSaints Жыл бұрын

I think you're onto a winning design with cheesecake. Especially when he gets his "secret weapon" for the wedges 😉. That spinner does spin very fast lol

@CamdenWallraff Жыл бұрын

With such large wheels, you might be better off offsetting the motors and running TPU/nylon gearing to absorb the torsional loads from the wheels hitting the ground at high speed

@Term-0 11 ай бұрын

You should extend the wheels back again, this will allow you to right faster from being stuck upright but more importantly, it could allow you to absorb more shock from falling on the back. Those compliant wheels were really effective I'd say.

@alexsalchemy 10 ай бұрын

I've thought about it, but have you ever tried to steer a heavy shopping cart using the handle bar at the back? That's what it's like to drive old Cheesecake: tons of under-steering. Now, if I can redistribute some of the weight more toward the rear inside the chassis... maybe this design could make a comeback.

@wich1 11 ай бұрын

Would it help to angle the edge of your weapon such that it would either be exactly vertical or even such that the top edge is closer to the main body than the bottom edge? As it is now I should thing the natural force on the edge tends to push the weapon up and away from your opponent, especially when they have sloped sides. When you change the angle of the edge of your weapon you could maybe change it such that it tends to dig in, or be neutral if digging in would give too much load too fast on the weapon.

@axel_fagerberg Жыл бұрын

What do you think about foam wheels?

@alexsalchemy Жыл бұрын

They're probably fine, but I like being able to customize my wheels and give them rubber band treads. I can't easily make my own foam wheels.

@dutchdrifter8740 Жыл бұрын

Loving your videos. Quick question, is hitting the wall to get your robot unstuck allowed?

@alexsalchemy Жыл бұрын

I'm pretty sure you can hit the wall as much as you want. Most arenas have a "kick plate" at the base of the wall where most robots are likely to hit it anyway. Just... you know, don't set out to specifically break the arena.

@dutchdrifter8740 Жыл бұрын

@@alexsalchemy Thanks, good to know. I could have imagined that there where rules about "outside" interference.

@alexsalchemy Жыл бұрын

@@dutchdrifter8740- Oh wait, I'm sorry, you were asking if it's okay for the driver to hit the wall of the arena with their hand. Generally the answer is no, but you do get one "un stick", and you can do it by hitting the wall from the outside if that works.

@human890209yang Жыл бұрын

Why did your weapon stop spinning during the fight?

@alexsalchemy Жыл бұрын

I think my weapon motor overheated. I did a lot of weapon and motor tests this weekend, and I found that the weapon I used at this tournament was probably too big for the 1800KV weapon motor, which caused the motor to draw a lot of current and overheat.

@human890209yang Жыл бұрын

@@alexsalchemy Did the motor or the ESC overheat? Does an overheated motor recover its magnetism after a cooldown?

@alexsalchemy Жыл бұрын

@@human890209yang - The ESC was okay (I think). The overheated motor recovered. I think it shut down because the copper wires got hot, which increased their electrical resistance, and not enough current got through to spin the motor. I'm not an electrical engineer, so that's my best guess.

@human890209yang Жыл бұрын

@@alexsalchemy Thanks.

@wafranken6502 Жыл бұрын

Here is my personal opinion, The wheels were too big for the motors, so that the motors were running too big of wheels

@alexsalchemy Жыл бұрын

You're probably right. It's just so nice to have big wheels! They keep me up away from people's weapons, and they allow me to drive over debris that might otherwise get me stuck... but you're probably right.