SUBTRACTION --- 3 Pound Combat Robot Reveal
Рет қаралды 4,069
10 ай бұрынSUBTRACTION is the newest combat robot from Team Just 'Cuz Robotics. SUBTRACTION will be competing at the NHRL September 30th 2023 tournament.
SUBTRACTION is an evolution of Shameless Self Promotion, which had a top 8 finish at the 2023 National Havoc Robot League "Hot Bot Summer" event, and is the basis for the popular SSP 3lb Lifter Kit. The weapon system of SUBTRACTION consists of a completely custom mass manufacturable hubmotor called the JCR 4935 1000kV. If it works, this will become a drop-in weapon attachment for the SSP Kit, and will be open for use in any other custom-designed combat robot as well.
The JCR 4935 1000kV motor has been built for combat from the ground up - everything about it is meant to withstand the immense forces that 3lb combat robots can dish out. The motor itself weighs around 205 grams and is 49mm in diameter and about 35.5mm tall. More details to follow in an upcoming deep dive video...
JCR-4935 MOTORS ARE AVAILABLE!
Many details are on the product page, please read carefully before asking questions here.
bit.ly/4935-preorder
If you are interested in a preorder or beta testing this motor, please email us at team@justcuzrobotics.com!
Just 'Cuz Robotics Website: justcuzrobotics.com/
Just 'Cuz Store: justcuzrobotics.com/shop
Support on Patreon! bit.ly/JCRPatreon
Try PCBWay's CNC Machining or PCB Fab using this link for a $5 new user credit: bit.ly/PCBWayJustCuz
Instagram: @JustCuzRobotics
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#combatrobotics #beetleweight
JJJreact. Hi Jacksfilms!
@wes8486 10 ай бұрын
Man, that motor looks so cool. I've always toyed with the idea of a fully custom motor but it's currently out of my reach. I am still sceptical though, if this motor is capable of being roofed from a weapon on weapon impact.. but it looks really beefy and well designed. You're doing awesome stuff, I'm really excited to see it at Norwalk!
@JustCuzRobotics 10 ай бұрын
There are a huge number of improvements to this over a traditional motor to make it survive, but you never know til you get hit!
@Drawliphant 10 ай бұрын
When someone says you can't use a motor for your weapon axle just use a bigger motor instead, much stronger.
@Drawliphant 10 ай бұрын
The motor weighs 200 grams.... I need that for my ant weight😂
@JustCuzRobotics 10 ай бұрын
That would be some antweight!
@dingaangwangwa810 10 ай бұрын
Yeah 😮
@mariocastanares2011 10 ай бұрын
Super Sweet Subtraction beetleweight...😊
@stiguybob793 10 ай бұрын
Hey just found your channel yesterday and have been binging all your videos, you rock man!!! And this is such an AWESOME teaser!!! I’m getting goosebumps watching, so excited for this!!!
@JustCuzRobotics 9 ай бұрын
Thank you so much!
@Ossimsauce 9 ай бұрын
That engraving timelapse was such a perfect reveal
@JustCuzRobotics 9 ай бұрын
Thank you!
@heartofdawnlight 10 ай бұрын
SSP seems to have learned how to fight back
@dingaangwangwa810 10 ай бұрын
Wow now that is a good keep it up👍
@JustCuzRobotics 10 ай бұрын
Thank you, I will!
@The8BitNerd 10 ай бұрын
If Mini Mulcher and SSP had a baby.
@FireMageTheSorcerer 10 ай бұрын
Division, Subtraction. Hmm I wonder what could be next. Aha, Square Root!
@forceofwillgaming8475 10 ай бұрын
I AM IN LOVE WITH THIS NEW ROBOT. Best of luck to you this weekend and I will be getting one of those if they go on sale. My only concern is the open space in the chassis where the lifter would go in the lifter version of the SSP kit though I'm sure you will address that before making this an official JCR product. Have fun and be safe. I'll be rooting for you as I'm not judging this weekend's event.
@JustCuzRobotics 10 ай бұрын
The last couple dozen SSP kits sold have a new chassis that makes this hubmotor weapon a drop in attachment option. If someone has an older SSP they should be able to use a dremel and a drill to make the needed modifications.
@forceofwillgaming8475 10 ай бұрын
@@JustCuzRoboticsjust a thought. Would it be possible for you to sell a version of SSP that is just the chassis and drive so people could design their own weapon to use with the chassis. Kinda like Tie Dye and mako have done.
@JustCuzRobotics 10 ай бұрын
I won't say that I for sure would or wouldn't offer that. I want to build up at least a couple of my own weapon attachment options eventually. The servo lifter attachment really doesn't cost that much, it probably would not save more than like $20-40 off the price of the kit. Spinner attachments will be a lot more costly for sure, even an ESC for those could cost as much as the servo. I do hope to offer a drive electronics bundle at a discount that's basically the internals of an SSP that could be used with any custom chassis though. If you are 3d printing a robot chassis it's way cheaper than a milled UHMW one, but UHMW is a lot more durable and more scalable than a 10 hour print per robot.
@bami2 10 ай бұрын
Love the laser-etched name on the top plate
@JustCuzRobotics 10 ай бұрын
Thanks!
@motlow1465 10 ай бұрын
Looks solid! Can't wait to see it in action, nice work.
@JustCuzRobotics 10 ай бұрын
Thank you!
@CrimsonHiroX07 10 ай бұрын
It looks like SSP stole Divisions blade... I like it.
@JustCuzRobotics 10 ай бұрын
Division has a 7.5 inch blade, SUBTRACTION has a 9 inch blade!
@sushsidnd 10 ай бұрын
This has gotta be one of the most dope hype videos for a combat robot that I've ever seen
@JustCuzRobotics 10 ай бұрын
😁 thank you! I really appreciate that. It was a lot of work!
@DigitalJedi 10 ай бұрын
This looks a lot like my 3lb undercutter. I'm excited to see your take on the horizontal game.
@JustCuzRobotics 10 ай бұрын
My 1lb bot Mini Mulcher is also an overhead horizontal but it's wayyy less stable than Subtraction so I'm pretty hopeful
@craigbowie8925 10 ай бұрын
That is going to be fun to watch.
@JustCuzRobotics 10 ай бұрын
I hope so!
@razer259 10 ай бұрын
That looks very promising and punishing!
@JustCuzRobotics 10 ай бұрын
Thanks, I hope it works as good as it looks!
@chefboiarby304 10 ай бұрын
So when you mentioned a spinner upgrade to the SSP kit, I thought you meant like a small vertical spinner module that fits into the lifter slot. This is not what I expected, but I am even more intrigued.
@zedf7244 10 ай бұрын
Looks interesting! Curious to see what your plan for self-righting when getting flipped by a control bot is. Also, the intro music was a great pick this time. :)
@JustCuzRobotics 10 ай бұрын
It kinda drives upside down with the back wheels, but I am going to play with cone shaped attachments over the spinner to see if it can be improved or self right somehow. If I think there is a very high chance of being flipped I can always switch back to the SSP lifter configuration though. Thanks!
@danielnye427 10 ай бұрын
That shaft on the motor looks beefy enough! Good work Seth and good luck.
@JustCuzRobotics 10 ай бұрын
Thank you!
@Fatbloooood 10 ай бұрын
Can you put that upgrade kit in the mail right now? ☠️🤠🤓
@JustCuzRobotics 10 ай бұрын
Sadly it will take probably 2 months to get another batch but I'll be working on it as soon as I can!
@andreikersha4060 10 ай бұрын
Awesome bot, Seth, I presume we'll see it on September 30th!
@JustCuzRobotics 10 ай бұрын
Yup!
@starry53 10 ай бұрын
Awesome Over-cutter Spinner named Subtraction. Will it compete with Division in NHRL September 2023.
@JustCuzRobotics 10 ай бұрын
The September NHRL filled up super fast and I could only register one robot so Subtraction fights alone!
@ioncannonmusic 10 ай бұрын
Is it able to self-right from the crazy torque to weight ratio of the weapon motor, or what’s its plan for inversion?
@JustCuzRobotics 10 ай бұрын
Sadly not thaaaat much torque. But I was able to get it to drive upside down at least well enough to not get counted out! And might be able to drive into a wall to self right potentially.
@Living_Murphys_Law 10 ай бұрын
The weapon goes over the wheels, so just making sure, it does have a way to deal with being flipped, right?
@JustCuzRobotics 10 ай бұрын
It kinda drives upside down with the back wheels, but I am going to play with cone shaped attachments over the spinner to see if it can be improved or self right somehow.
@Unhallowedrobotics 10 ай бұрын
That looks terrifying
@JustCuzRobotics 10 ай бұрын
😈😈😈
@dogjutsufpv3813 10 ай бұрын
Interested to find out about the motor -- be cool if it's able to deal with big vert hits on the blade and doubly so if it can take the punishment without doing the epoxy battle-hardening thing.
@JustCuzRobotics 10 ай бұрын
I guess I'll see! The FEA simulations I did suggest the blade will bend long before the motor shaft fails but its always possible the magnets explode or something. Only one way to find out, in the arena!
@BeefIngot 10 ай бұрын
Interesting design. I wonder what a v2 might look like. maybe tilting up by pushing the back wheels down to get a lower angle on the blade? Very interested in seeing how that motor survives. I must also wonder if having it go through the case of the bot that close in some way is to help brace the motor since the shaft is sort of cantilevered since its only really supported at the base of the can. Like perhaps when a big hit comes in, its meant to deflect, hit into that top panel, and therefore not need all of the impact to go right into the shaft. I do wonder though if there is enough room/built in flexibility there for that too happen before exceeding how much the shaft can take.
@Emer8 10 ай бұрын
Unlikely Pushing the back wheels down while may allow better engagements with the lower front weapon, is going to make driving extremely difficult with how angled weapons gyro.
@JustCuzRobotics 10 ай бұрын
Emer8 is right, my ant has an angled overhead blade and it's sortof a nightmare. Because subtraction is built off of the SSP chassis I have really no choice about the height of the weapon being taller than some robots. Instead I've decided that I'll just lean into the fact that SSP has fantastic ground game. As soon as I get under the opponent they instantly experience full bite on my weapon if they were too short to begin with. This should lead to some gigantic hits if less frequent
@TeamJunkYardDog 10 ай бұрын
Kamikaze! or Mini Blood Sport Looks great!
@mikoonblitz5966 10 ай бұрын
Prolly dumb question but how does it fare driving inverted?
@JustCuzRobotics 10 ай бұрын
Not very well! I'm working on that today.
@burnsfamily1616 10 ай бұрын
I LOVE IT
@JustCuzRobotics 10 ай бұрын
Thanks!
@burnsfamily1616 10 ай бұрын
@@JustCuzRobotics OMG U RESPONDED TO ME
@burnsfamily1616 10 ай бұрын
@@JustCuzRobotics Also this winter i will be making my own mini mulcher
@JustCuzRobotics 10 ай бұрын
Cool, good luck
@burnsfamily1616 10 ай бұрын
thanks@@JustCuzRobotics
@neilrhoades5951 10 ай бұрын
How thick is the shaft?? Is it hardened steel?
@JustCuzRobotics 10 ай бұрын
8mm diameter. It's not hardened like tool steel would be but it is heat treated appropriate for a shaft
@jimbotron8552 10 ай бұрын
subarashii
@sickboy1031 10 ай бұрын
Are they going to cast the fights live
@JustCuzRobotics 10 ай бұрын
Yes, NHRL has a really impressive livestream. However there are a ton of 3lb robots so most fights may not make it to the stream. They set up a special thing called Brett Zone where you can see all the other fights as well but without commentary. www.nhrl.io/
@alexsalchemy 10 ай бұрын
Can I ask why your weapon has two teeth instead of one? My robot's weapon only has one tooth in order to maximize bite into my opponent. Also, super cool robot, I'm a big fan of the direct-driven weapon!
@JustCuzRobotics 10 ай бұрын
I have a relatively low RPM weapon since it's huge, 9 inches in diameter. So I thought having 2 teeth wouldn't give up too much. Division's weapon actually spins at around the same RPM and its similar looking Superlight Slicer still hits pretty damn hard. I'll definitely play around with different blade designs in the future though.
@Vivitribal_lame 10 ай бұрын
I Littearly had a Daydream about this being an idea of an SSP bot like this in May so now I am scared of my intuition.
@JustCuzRobotics 10 ай бұрын
Haha wild
@rc-fannl7364 9 ай бұрын
Can it self-right when flipped over?
@JustCuzRobotics 9 ай бұрын
Not this version, though it can sorta drive upside down. I'll be working on that more with the next iteration. This was sort of a proof of concept.
@rc-fannl7364 9 ай бұрын
@@JustCuzRobotics I see. So maybe some ideas from this design will be used in a future bot called "Addition" or "Equation"? To suggest a few new names. ;-)
@JustCuzRobotics 9 ай бұрын
What I meant is that I want to bring subtraction back with some improvements
@rc-fannl7364 9 ай бұрын
@@JustCuzRobotics Ah, ok. So this is basically a beta version of Subtraction and the experience gained from it will lead to the "release" version of it.
@JustCuzRobotics 9 ай бұрын
Kind of? Everybody is always improving their robots in combat robotics between competions. Rarely do people build a whole new bot every time they compete, and while some people do take the same bot with no changes to several events usually yoy try to make at least some improvements. I have competed with Division for 2 years and I changed things all the time.
@andrewpetrov7646 10 ай бұрын
this will probaby be a kit for ssp idk looks like it
@JustCuzRobotics 10 ай бұрын
Certainly could be if it works!
@markxr1 10 ай бұрын
Can you confirm that this goes in unseeded into the challenger bracket, as it's technically a new robot? I hope you are really gentle on any newbies who come along with my 1st robot!
@JustCuzRobotics 10 ай бұрын
As far as I know, yes it counts as a new bot!
@j.f.3542 10 ай бұрын
Do you sell this motor?😇
@JustCuzRobotics 10 ай бұрын
Not yet! This bot will be the test for the first prototype motors. If they work I'll have them available for preorder in a few weeks
@NeonDeion109 8 ай бұрын
TEAM PEMDAS!?!
@johnathanclayton2887 10 ай бұрын
Looks a bit like a 3lb crippling depression! Very cool.
@RobertCowanDIY 10 ай бұрын
that bot sucks
@ma9ici4n 10 ай бұрын
0:44 swastikas on the weapons lol
@JustCuzRobotics 10 ай бұрын
No... I'm Jewish I would never. Its just an interface pattern that's cheaper to lasercut than 9 holes would be.
@ma9ici4n 10 ай бұрын
@@JustCuzRobotics oh i was just joking, I know its not on purpose so dont worry
@teamsmokeyrobotics 10 ай бұрын
You could put a bigger weapon and rename it SSD: shameless self destruction
@JustCuzRobotics 10 ай бұрын
That would be difficult it's kind of close to the weight limit right now. I probably will play around with different weapon designs in the future though. Maybe I can try one that requires the front forks to be removed to make weight for an even larger weapon
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