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Division is a Vertical Disk Spinner 3lb Robot.
Division is a Vertical Disk Spinner 3lb Robot.
===Robot Facts===
===Robot Facts===
[[File:Division.jpeg|30%px|thumb|right|Division]]Version 2.8 (February 2021 NHRL)
[[File:Division-removebg1.png|alt=Division|thumb|Division - August 2023]]
Version 3.5 (July 2023-Present)
{| class="wikitable" style="width: 60%"
{| class="wikitable" style="width: 60%"
!Team
![[Just 'Cuz Robotics]]
|-
|-
! Driver !! [[Seth Schaffer]]
| Driver || Seth Schaffer from [https://www.youtube.com/channel/UCsoZN2VwWJbJ30y2e2sfmnw/ Team Just 'Cuz Robotics]
|-
|-
| Weight Class || [[3lb Weight Class|3lb]]
| Weight Class || [[3lb Weight Class|3lb]]
|-
|-
| Body Material || Titanium & Aluminum
| Body Material || Solid Aluminum Billet
|-
|-
| Weapon || 7.5" Vertical Spinner
| Weapon || 7.5" Vertical Spinner
|-
|-
| Weapon Drive || Cobra 2814
| Weapon Motor || Cobra 2814
|-
|-
|Wheels
| Drive || [https://www.youtube.com/watch?v=D1V4iaFsHO4 Custom Brushless 1806 15:1 Gearbox]
|3D Printed TPU Hubs + Cast Urethane Tires
|-
|-
| Drive || [https://justcuzrobotics.com/products/dartbox-squared-drive?_pos=1&_sid=acd589f71&_ss=r DartBox Viper 6mm Motors]
| Power || 4S Lipo
|-
|}Version 2.8 (November 2020 NHRL)
| Power || 4S Lipo & Custom Power Distribution PCB
|}

Version 2.12 (July-November 2021)
{| class="wikitable" style="width: 60%"
{| class="wikitable" style="width: 60%"
|-
|-
| Body Material || Titanium & Aluminum with 3D Printed Mounts
| Weapon Drive || Propdrive 2836 V2
|-
|-
| Power || 3S Lipo
| Weapon || 7.5" Vertical Spinner
|}
|-
| Weapon Motor || Cobra 2814
|-
| Drive ||[https://www.youtube.com/watch?v=D1V4iaFsHO4 Custom Brushless 1806 15:1 Gearbox]
|-
| Power || 4S Lipo
|}{{Bot Stats|bot=Division|class=3lb}}


==Version 3.5 (July 2023 Redesign)==
{{Bot Stats|bot=Division}}
With the overall solid performance of Division's weapon system in 2022 but disappointing durability in 2023, a bunch of minor tweaks have been implemented in 2023. While there were few before May 2023, after both Labor Day Disarray in November 2022 and the March NHRL event, the Drivetrain was really struggling to hold up to modern horizonal spinners. The drivetrain now uses Just 'Cuz Robotics own DartBox drive brushed motors with AM32 brushed firmware ESCs. The weapon system was also updated slightly with AM32 firmware on the weapon ESC to improve startup torque and reliability.
== Version 3 (2022 Redesign) ==
Division was always a mean robot to fight, but its explosive power proved to be its own downfall only a little less than half the time. With the V2.X archetype, repairs and maintenance were cumbersome, and with many retrofitted components taking the place of prior ones, the whole structure was really problematic in the end. At the end of 2021 it was retired officially, and a brand new from scratch redesign effort began,
[[File:Division V3 Drivetrain.jpg|alt=Division V3 Drivetrain - This consists of a 3D printed Nylon motor mount, a 1/4" steel shoulder bolt dead axel, and nearly indestructible TPU hubs and Urethane tires. |thumb|Division V3 Drivetrain - Custom pinion gear on a Xing 2306 1700kV motor, driving a 3D printed Nylon spur gear coupled to a 3D printed TPU hub with an overmolded Urethane tire]]
The emphasis for Version 3.0 was reliability and reparability. The weapon motor, weapon ESC, drive ESCs, and weapons themselves are the only parts carried over into V3.0. The drive system was entirely overhauled and replaced with a system first prototyped on the control bot Shrapnel Mine (pictured). Shrapnel Mine proved the system could work, and it was able to survive hits far better than any foam wheels with metal hubs ever could. This design is intended to accomplish several things:


# The TPU wheels should survive multiple huge impacts without losing functionality, and absorb shock well
Division's 2021 debut could have gone better. After its first opponent forfeit due to not showing up to the event, Division was faced with an extremely tough opponent in Eruption, a very Lynx-esque beater bar which spins much faster than Division's own weapon. Division always struggles against bots like this, and this was no exception, especially given the brand new weapon system as of yet untested in battle. Less than a minute into the fight Division tapped out with a drive side down, weapon motor entirely detached, and the power switch having been torn loose inside the bot. Fortunately the builder came prepared with a second Division as a spare, and was able to use it for the next fight while finishing up a nearly 3 hour repair job to get the first bot working properly again. It was discovered that the weapon system failure had been caused by not countersinking the motor mount screws deep enough - a costly oversight. All of the electronics besides the switch survived, however.
# The dead axel should never bend or break without other elements failing spectacularly first
# The single stage reduction is far lighter than a planetary gearbox, way cheaper, and more robust
# Custom molded 30A urethane tires have superior grip to foam wheels and most Banebots wheels
# More than 4X the drive power of even Fingertech Mega Sparks on 4S
# Every part can be easily serviced in minutes


[[File:Division Billet Chassis.png|thumb|This chassis part weighs about 6.5 ounces and is milled from a single 4lb solid block of 6061 Aluminum]]
Division's next fight was against Doom, a meltybrain chain flail bot with unique fiberglass armor. The first two minutes were a whole lot of Division punting Doom all over the box and shrugging off its chain like it wasn't even there, occasionally cartwheeling all over the box without a single issue on the weapon system. This was a great sign, and a huge relief that proved the upgrades had worked as intended. Sadly the spare robot was outfitted with the older weapon which has a blunt neutral rake impactor, so it wasn't able to effectively penetrate the tough fiberglass armor on Doom like the new Cutter blade weapon might have. Even though the weapon was running at under 33% speed for the vast majority of the fight it had no problems almost launching Doom into the ceiling several times. The spare Division bot had a couple drive gearboxes with soldered on pinions rather than press fit due to a gear manufacturing error from the factory. Eventually, about 2 minutes in, one pinion began to slip. Division's drive side gave out, but Division had already bent the steel hoop around Doom up on both sides, so a single hit that flipped Doom was all it took to get the KO win. Division happily enjoyed a gyro dance on its good driving wheel. Spare Division got a new gearbox later on with a spare pressed on pinion and was good to go. Weirdly one of the front wedges snapped where it was bent, likely due to stress fractures from hits past.
[[File:Shrapnel Mine (3lb bot from Team Just 'Cuz Robotics).jpg|alt=Shrapnel Mine is a control bot with an articulating saw arm, but unlike other saw robots, the saw arm articulates along with a hinged par of front forks, with the intent to get under opponents, pin them against a wall, and saw into the undersides. |thumb|Shrapnel Mine (3lb) from Team Just 'Cuz Robotics]]
Another extremely huge experiment was with the chassis. In order to reduce the overall part count and fastener count while maintaining as much rigidity as possible for a given weight, a solid single part aluminum chassis was designed to be milled from a single block of metal. This chassis has numerous advantages compared to the prior structure.


# 1 Piece Construction, saving about 30 screws
Although called to get ready about 10 minutes later, repairs on the main robot were finished up just in time! With a fresh gearbox, rewired switch, new forks, new weapon motor, new rear armor panel, and fresh wheel hubs, Division made its way into the box to see a familiar face. In November 2020, Division had fought and destroyed Sea Devil, a bot by the same exact driver as Division's next opponent: Crossbow. Sea Devil was a vector kit. Crossbow was made of mostly Vector Kit parts, but sideways to make for a big vertical spinner. Unfortunately for Crossbow, its weapon was not a Vector kit bar, but rather a far far heavier weapon, and the weapon motr from the Vector kit couldn;t quite handle the added inertia. Out of the gate, Division gets up to half speed in a second, crosses the box, and delivers a nice hit to Crossbow before Crossbow managed to get spun up or leave the starting position. Crossbow gets stuck on its side, which is its most stable position unfortunately. Trying to keep the fight going, Division goes in for a few more hits until Crossbow magically ends up on its wheels again. However, with one final hit, Division nails the side of Crossbow, which is only held on with a fairly thin 3D printed piece, and Crossbow taps out after landing in three pieces with a drive motor dangling from the side. 27 seconds. One battery swap later, Division is ready to go.
# Much more rigid and less likely to permanently bend than prior baseplate
# Cost is only ~$22 of metal, outsourcing for about $62 each with sponsorship
# Upright mounting is vastly improved, and much better constrained square to the baseplate
# Uprights no longer need to be drilled and end tapped, and are now purely 2D lasercut parts
# Far greater design freedom with 3D vs 2D construction
# Far greater overall stiffness
# Solid single part metal connections, way stronger than Nylon printed parts and screws which frequently failed
# Integrated top panel screw holes, avoiding headaches with threaded standoffs in prior versions
# Rear threaded holes allow for modularity with future rear attachments


And many more!
Feeling pretty good about the bot and how it was performing, and with a draw against a front-hinged flipper bot Bison, Division ends up accompanied in the box this time by Mini Mulcher, an antweight minibot that has a weapon larger than several beetleweights. Sadly this proved Division;s downfall, as not 20 seconds into the fight, Division got its wheel hub cut in half my Mini Mulcher, and lost a wheel. The fight went the full 3 minutes with a lot of back and forth, and Mini Mulcher miraculously surviving multiple Division hits and ceiling shots, but Division only got a couple good hits on Bison. At a few points Division appears to be stuck on the wall, but one of Division;s new tricks is reversing the weapon. When doing this the gyroscopic braking forces launch the robot backwards, freeing it from basically any possible obstruction, and this worked flawlessly during the match. Division freed itself from getting possibly stuck many times even with just one wheel, and remaining perfectly mobile the entire fight. Despite Bison needing Brett to free it from getting stuck on the floor at one point, Division was deemed to have lost almost all control and aggression and the damage to Bison was not as significant as a lost wheel, so Bison was unanimously determined to be the victor. Mini Mulcher lived to fight another day after launching itself into the roof, with the only meaningful damage being the loss of its Talon self righter.


Division V3.0 first entered the March 2022 tournament which exposed a few design flaws and sub optimal material choices. However, it worked as a proof of concept to show there was potential if the billet chassis were better protected. The weapon reliability was very good.
Although it only got two real wins, Division is clearly a vastly improves robot with the new weapon system and the Fairloc pulley worked amazingly well to prevent damage to the weapon motor once it was properly secured. The weapon never died after that first fight and always spun up exactly as fast as it was supposed to. The only real repeated issues were the wheel hubs being too brittle, and the titanium forks bending way too easily and getting in the way, though still an improvement over the nylon forks from November. Overall, a promising start to 2021. Division showed it can finally be more than a glass cannon, able to survive any hits it dishes out to the opponent or the floor, rather than getting stuck doing 'the thing' so often like last year. Division will be back, and it only gets better.


Division V3.1 fought in April with an added TPU rear protector, larger battery, and more durable drive mounts, and this proved extremely competitive with a 6-2 showing, beating several tough opponents (Sombra, Clyde, Spartan X, and Fully Defined). Still, the final fight with Lynx showed there were obvious areas for improvement with the drive system.
== Combat History ==
Division V1.0 first competed at Norwalk Havoc in August 2019 with a blue color scheme. After that, with wins over multibot Sisyphus and The Rock, and Foiled Again, but losses to Trident and Scrambler, the design was completely overhauled for a V2.
Division has continually been iterated after every competition. V2.0 competed at Norwalk Havoc in September 2019, and then upgraded versions competed at the Franklin Institute, SWORD Fall 2019, Norwalk in January 2020, and Motorama in February 2020 with version 2.7. In every competition besides Franklin Institute where Division went 0-2, it has had a record of at least 2-2 or better.


Division V3.2 was upgraded with even more durable Polypropylene drive mounts and rear armor, as well as a design change to the drive mount design to make it more easily serviced and more consistent to handle. This was also a test for a new tire molding compound that would adhere to the hubs much better, which while true, also wore down substantially after a few fights. Once again, Division lost to extremely competitive beater bar bots, but in four grudge matches it showed its true potential with dominant showings across the board. The reliability of the bot as a whole is very good, but there is still room for improvement.
Since Motorama (February 2020), the drive was upgraded to a fully custom brushless solution, the rear armor was upgraded, and Carbon-Fiber Nylon 3D prints were added in place of some plain Nylon parts from past versions. The weapon ESC was upped from 50A to 80A, and the battery was larger as well.

Division V3.2 went on to compete at an event called Labor Day Disarray on September 3rd, 2022. Division had a great run at this event with 4 wins. Division beat May NHRL champion bot Crashfest twice, ultimately losing out to Caldera to earn a 2nd place podium spot, and winning the Most Destructive Bot award. Caldera was responsible for both of Division's losses at this event.

==Notable Facts==
Division stores about 700 joules of kinetic energy in its various weapons with tip speeds approaching 235mph max. However, due to the gyroscopic forces created at top speed and the loss of bite at high RPM, Seth constantly modulates the speed of the weapon while driving to ensure turning is manageable and the hits delivered are biggest when the opportunity arises.

As of 2022, Division has five interchangeable AR500 weapons, but the asymmetric Cutter Blade is the current favorite, having the ability to survive horizontal spinner hits and cut through soft plastic and aluminum armor with ease. Each weapon is roughly 200-255 grams. Fights with Division very rarely make it the full three minutes - it is designed to end fights fast and decisively.

Division V2.12 in 2021 had been rebuilt many times since Version 2.0, but only gotten a ground up redesign between 1.0 and 2.0. Since V2.0, the drivetrain and weapon system have both changed drastically, the armor package has moved from entirely aluminum to mostly titanium, and the entire system voltage was raised. Only the exterior resembled what it was back in 2019. It was sold off at the end of 2021 to fund a brand new build for Division V3.0 in 2022

==Combat History==
'''V2.7-V2.12 (2021)'''

Division lived on to fight through many tournaments both in and out of Norwalk. General reliability improvements to the weapon system were made using a DYS Aria 70A BlHelo32 weapon ESC with conservative programming, a Cobra 2814 1850kV weapon motor with a beefy 5mm shaft, and clamping pullies that slipped on the motor shaft to prevent shock loads from ruining the motors. This last change p[roved to be extremely problematic, however. Toward the end of its combat career, Division V2.X had at least four instances where the pulley axially slid down the motor shaft until it came in contact with Division's own weapon, tearing the motor loose from its mounting. The first time the motor came loose was against Eruption in Division's first fight ever using the Cobra motors. At Division V2.12's final tournament, it was given a brutal sendoff by fighting against more than [https://youtu.be/lDVwuW8MP8k 9 opponents at once in a rumble], knocking five out, losing its weapon motor entirely in the fray, before falling on its back, unable to self right, just 20 seconds from the end of the match.

'''V1.0, V2+ (2020)'''

Division V1.0 first competed at Norwalk Havoc in August 2019 with a blue color scheme. After that, with wins over multibot Sisyphus and The Rock, and Foiled Again, but losses to Trident and Scrambler, the design was completely overhauled for a V2. Division has continually been iterated after every competition. V2.0 competed at Norwalk Havoc in September 2019, and then upgraded versions competed at the Franklin Institute, SWORD Fall 2019, Norwalk in January 2020, and Motorama in February 2020 with version 2.7. In every competition besides Franklin Institute where Division went 0-2, it has had a record of at least 2-2 or better.

Since Motorama (February 2020), the drive was upgraded to a fully custom brushless solution, the rear armor was upgraded, and Carbon-Fiber Nylon or TPU 3D prints were added in place of some plain Nylon parts from past versions. The weapon ESC was upped from 50A to 70A-80A, and the battery was larger as well.


In the November 2020 NHRL Tournament, Division did not perform exactly as expected, although still achieving a 2-2 record against incredibly tough opponents. Many changes which were tested over and over again before the tournament and seemed perfectly reliable, failed unexpectedly and early in fights. Weapon reliability was the main issue as it broke in several ways in different fights. In the end the most repeated issue came down to the weapon motor vibrating itself loose, allowing it to slip in belt tensioning slots from its ideal position. The slack in the belt meant that the weapon spun up fine with little resistance, but lacked the torque to self right like it had proven to do in testing. While the robot suffered little to no real damage in the fights it lost, it was unable to get back onto its wheels and keep driving. The custom brushless drive and 3D printed wheel hubs, however, performed amazingly well, and the drive never failed, even with the wheels taking direct hits in three separate fights.
In the November 2020 NHRL Tournament, Division did not perform exactly as expected, although still achieving a 2-2 record against incredibly tough opponents. Many changes which were tested over and over again before the tournament and seemed perfectly reliable, failed unexpectedly and early in fights. Weapon reliability was the main issue as it broke in several ways in different fights. In the end the most repeated issue came down to the weapon motor vibrating itself loose, allowing it to slip in belt tensioning slots from its ideal position. The slack in the belt meant that the weapon spun up fine with little resistance, but lacked the torque to self right like it had proven to do in testing. While the robot suffered little to no real damage in the fights it lost, it was unable to get back onto its wheels and keep driving. The custom brushless drive and 3D printed wheel hubs, however, performed amazingly well, and the drive never failed, even with the wheels taking direct hits in three separate fights.
==== Changes Made for February 6th ====


==Select Fights==
* '''New redesigned uprights''' with no slots - just the perfect belt tension always
{{#ev:youtube|https://www.youtube.com/watch?v=Sww-vsWSQBw}}
* '''Titanium front forks''', which shouldn't break off
{{#ev:youtube|https://www.youtube.com/watch?v=_ErE7kddM80|||||start=3405}}
* '''New 'Cutter Blade'''' weapon design mixing the best features of the asymmetric disk and "S blade"

* Bigger, torquier, '''even more powerful weapon motor''' with a 5mm shaft
[[Category:3lb Bots]]
* 4S Lipo instead of 3S
[[Category:US Robots]]
* Switch to 16T motor pulley with Fairloc hub to act as a slip clutch
[[Category:NHRL 2018-19]]
* Improvements to brushless gearbox housing & side armor for better mounting
[[Category:NHRL 2020]]
* Cast polyurethane tires are an option (for rare circumstances like fighting a control bot)
[[Category:3lb Bots]][[Category:NHRL 2020]]
[[Category:NHRL 2021]]
[[Category:NHRL 2022]]
[[Category:NHRL 2023]]
[[Category:Vertical Spinners]]

Latest revision as of 15:47, 1 October 2024

Division is a Vertical Disk Spinner 3lb Robot.

Robot Facts

Division
Division - August 2023

Version 3.5 (July 2023-Present)

Team Just 'Cuz Robotics
Driver Seth Schaffer
Weight Class 3lb
Body Material Solid Aluminum Billet
Weapon 7.5" Vertical Spinner
Weapon Motor Cobra 2814
Wheels 3D Printed TPU Hubs + Cast Urethane Tires
Drive DartBox Viper 6mm Motors
Power 4S Lipo & Custom Power Distribution PCB

Version 2.12 (July-November 2021)

Body Material Titanium & Aluminum with 3D Printed Mounts
Weapon 7.5" Vertical Spinner
Weapon Motor Cobra 2814
Drive Custom Brushless 1806 15:1 Gearbox
Power 4S Lipo









Statistics

Info

  • Rank: #208 in 3lb.
  • Last 5 fights: LWWWL
  • Current streak: L1 (0 KOs/KO'd)
  • Longest winning streak: 4 (2 KOs)
  • Longest losing streak: 4 (3 KO'd)
  • Avg fight time (seconds): 87.9

Record

Year Events Fights W L % KOs KO'd
2018-19 2 7 4 3 0.571 3 3
2020 2 9 5 4 0.556 4 4
2021 3 11 5 6 0.455 5 5
2022 3 13 7 6 0.538 5 6
2023 2 7 3 4 0.429 1 2
2024
All-Time 12 47 24 23 0.511 18 20


Events

Date Fought as Reached Place Fights W L KOs KO'd
August 10, 2019 Division Losers 4 3 2 1 2 1
September 28, 2019 Division Losers 3 4 2 2 1 2
January 18, 2020 Division Losers 4 5 3 2 2 2
November 21, 2020 Division Losers 4 4 2 2 2 2
February 6, 2021 Division Losers 3 4 2 2 2 1
May 15, 2021 Division Losers 3 3 1 2 1 2
July 24, 2021 Division Losers 4 4 2 2 2 2
March 26, 2022 Division Elimination 2A 3 1 2 1 2
April 23, 2022 Division Elimination 7 7 5 2 3 2
July 16, 2022 Division Elimination Round 3 3 1 2 1 2
March 18, 2023 Division Boss 2 0 2 0 2
August 12, 2023 Division Bracket Round 3 5 3 2 1 0


Opponents

Opponent Fights W L KOs KO'd Last Meeting
Foiled Again 2 2 0 2 0 September 28, 2019
Professor Hex 2 2 0 2 0 March 26, 2022
Fully Defined 2 1 1 1 1 April 23, 2022
Sepi01 2 0 2 0 2 July 24, 2021
Death Adder 1 1 0 1 0 September 28, 2019
Sea Devil 1 1 0 1 0 November 21, 2020
Drum Go Dum 1 1 0 1 0 November 21, 2020
Marceline 1 1 0 1 0 May 15, 2021
BX11B 1 1 0 1 0 July 24, 2021
Spine Crawler 1 1 0 1 0 July 16, 2022
Protostorm 1 1 0 1 0 January 18, 2020
Wheels Are Tasty 1 1 0 1 0 January 18, 2020
Meili 1 1 0 1 0 January 18, 2020
Crossbow 1 1 0 1 0 February 6, 2021
Doom 1 1 0 1 0 February 6, 2021
WhirlWax 1 1 0 1 0 August 12, 2023
Absolute Zero 1 1 0 1 0 August 12, 2023
Dragonfruit 1 1 0 1 0 August 12, 2023
Sisyphus + The Rock 1 1 0 1 0 August 10, 2019
Sombra (3lb) 1 1 0 1 0 April 23, 2022
Lunch Break 1 1 0 1 0 April 23, 2022
Clyde 1 1 0 1 0 April 23, 2022
Spartan 1 1 0 1 0 April 23, 2022
BDE 1 0 1 0 1 September 28, 2019
Silent Spring 1 0 1 0 1 September 28, 2019
Nitro Hornet 1 0 1 0 1 November 21, 2020
Voxel (3lb) 1 0 1 0 1 November 21, 2020
Blackbird 1 0 1 0 1 May 15, 2021
Wreckfest 1 0 1 0 1 March 26, 2022
NotDeadYet 1 0 1 0 1 March 18, 2023
Brute 1 0 1 0 1 March 18, 2023
Honeycomb 1 0 1 0 1 July 24, 2021
Voxel v.1 1 0 1 0 1 July 16, 2022
Shreddit Bro 1 0 1 0 1 July 16, 2022
Wasp 1 0 1 0 1 January 18, 2020
Tiny Huge 1 0 1 0 1 January 18, 2020
Eruption 1 0 1 0 1 February 6, 2021
Scrambler 1 0 1 0 1 August 10, 2019
Dread Hades 1 0 1 0 1 April 23, 2022
Lynx 1 0 1 0 1 April 23, 2022
Bison 1 0 1 0 0 February 6, 2021
Ratfish 1 0 1 0 0 August 12, 2023
Kili 1 0 1 0 0 August 12, 2023

Click "Expand" to see this table.


Full Fight History

Date Opponent Round Result By Points Fight Length (s) Video
August 10, 2019 Trident Winners 1 Loss Forfeit 0.00
August 10, 2019 Foiled Again Losers 1 Win KO 1.00 68 https://youtu.be/_ErE7kddM80?t=1918
August 10, 2019 Toasty Losers 2 Win Forfeit 0.00
August 10, 2019 Sisyphus + The Rock Losers 3 Win KO 1.00 42 https://youtu.be/_ErE7kddM80?t=3405
August 10, 2019 Scrambler Losers 4 Loss KO -1.11 65 https://youtu.be/_ErE7kddM80?t=4085
September 28, 2019 Foiled Again Winners 1 Win Judges Decision 1.00 180 https://youtu.be/weuEDgtspwU?t=1
September 28, 2019 Silent Spring Winners 2 Loss KO -1.00 29 https://youtu.be/KZ0kPd_L1Bw
September 28, 2019 Death Adder Losers 2 Win KO 1.00 37 https://youtu.be/7S9_Ixr36_I
September 28, 2019 BDE Losers 3 Loss KO -1.33 80 https://youtu.be/R2m5htZtq3c
January 18, 2020 Protostorm Winners 1 Win KO 1.00 22 https://youtu.be/mR3lnezxzF8?t=7488
January 18, 2020 Tiny Huge Winners 2 Loss KO -1.00 68 https://youtu.be/mR3lnezxzF8?t=11888
January 18, 2020 Wheels Are Tasty Losers 2 Win Judges Decision 1.00 240 https://youtu.be/mR3lnezxzF8?t=19535
January 18, 2020 Meili Losers 3 Win KO 1.00 65 https://youtu.be/mR3lnezxzF8?t=24883
January 18, 2020 Wasp Losers 4 Loss KO -1.00 83 https://youtu.be/mR3lnezxzF8?t=27977
November 21, 2020 Voxel (3lb) Winners 2 Loss KO -1.00 32 https://youtu.be/shBFEDnKC28
November 21, 2020 Sea Devil Losers 2 Win KO 1.00 118 https://youtu.be/CbwqE_vDBU4
November 21, 2020 Drum Go Dum Losers 3 Win KO 1.00 84 https://youtu.be/HTFb0QA8BJg
November 21, 2020 Nitro Hornet Losers 4 Loss KO -1.11 113 https://youtu.be/AlKV-lYIf5U
February 6, 2021 Pipe Bomb Winners 1 Win Forfeit 0.00
February 6, 2021 Eruption Winners 2 Loss KO -1.32 50 https://youtu.be/9Rib27rbbfc?t=5689
February 6, 2021 Doom Losers 1 Win KO 1.00 151 https://youtu.be/9Rib27rbbfc?t=14545
February 6, 2021 Crossbow Losers 2 Win KO 1.00 28 https://youtu.be/9Rib27rbbfc?t=16789
February 6, 2021 Bison Losers 3 Loss Judges Decision -1.21 180 https://youtu.be/9Rib27rbbfc?t=23849
May 15, 2021 Sepi01 Winners 2 Loss KO -1.24 32 https://youtu.be/x5Co8AkBmsQ
May 15, 2021 Hobgoblin Losers 1 Win Forfeit 0.00
May 15, 2021 Marceline Losers 2 Win KO 1.00 27 https://youtu.be/Sww-vsWSQBw
May 15, 2021 Blackbird Losers 3 Loss KO -1.00 114 https://youtu.be/TJ3-Va6kzy0
July 24, 2021 Fluffy Death Machine Winners 1 Win Forfeit 0.00
July 24, 2021 Honeycomb Winners 2 Loss KO -1.04 64 https://youtu.be/w00PthxWHOE
July 24, 2021 BX11B Losers 2 Win KO 1.00 109 https://youtu.be/db9gNOqaij4
July 24, 2021 Professor Hex Losers 3 Win KO 1.00 50 https://youtu.be/-IJooaRa5-s
July 24, 2021 Sepi01 Losers 4 Loss KO -1.12 110 https://youtu.be/FxRJfyhlsr0
March 26, 2022 Professor Hex Undefeated 1B Win KO 1.00 24 https://youtu.be/uZmq9Hl75Ts?t=7244
March 26, 2022 Fully Defined Undefeated 2 Loss KO -1.00 135 https://youtu.be/KgyKEvpO6uU?t=5220
March 26, 2022 Wreckfest Elimination 2A Loss KO -1.15 53 https://youtu.be/ayB8B9kGa6k?t=14471
April 23, 2022 Lunch Break Undefeated 1 Win KO 1.00 39 https://youtu.be/It5MpH50dvs?t=4958
April 23, 2022 Dread Hades Undefeated 2 Loss KO -1.00 78 https://youtu.be/wf528BQr0eA?t=7202
April 23, 2022 Clyde Elimination 2 Win Judges Decision 1.06 180 https://youtu.be/LmS-A1QhbRc?t=10516
April 23, 2022 Sombra (3lb) Elimination 3 Win KO 1.08 69 https://youtu.be/wf528BQr0eA?t=19208
April 23, 2022 Drum Go Dum Elimination 4 Win Forfeit 0.00
April 23, 2022 Fully Defined Elimination 5 Win KO 1.16 15 https://youtu.be/wf528BQr0eA?t=26935
April 23, 2022 Spartan Elimination 6 Win Judges Decision 1.07 180 https://youtu.be/wf528BQr0eA?t=30400
April 23, 2022 Lynx Elimination 7 Loss KO -1.00 36 https://youtu.be/wf528BQr0eA?t=34810
July 16, 2022 Voxel v;1 Undefeated Round 2 Loss KO -1.28 85 https://youtu.be/Y7ICJDeDdfY?t=5996
July 16, 2022 Spine Crawler Elimination Round 1 Win KO 1.00 75 https://youtu.be/Y7ICJDeDdfY?t=11094
July 16, 2022 Skitter Elimination Round 2 Win Forfeit 0.00
July 16, 2022 Shreddit Bro Elimination Round 3 Loss KO -1.00 93 https://youtu.be/p76hqdy44QU?t=20895
March 18, 2023 Brute Round 2 Loss KO -1.13 17 https://youtu.be/oTohTyfcm5A?t=5870
March 18, 2023 NotDeadYet Boss Loss KO -1.00 66 https://youtu.be/gdrBzzkFkVg
August 12, 2023 Ratfish Qualifier Round 1 Loss Judges Decision -1.14 180 https://www.youtube.com/live/nAXvrZdnceQ?feature=share&t=2580
August 12, 2023 WhirlWax Qualifier Round 2 Win KO 1.00 26 https://youtu.be/Y9twilXzDpA?t=5808
August 12, 2023 Absolute Zero Bracket Round 1 Win Judges Decision 1.18 180 https://youtu.be/IMD6ArOMrPY?t=16925
August 12, 2023 Dragonfruit Bracket Round 2 Win Judges Decision 1.00 180 https://youtu.be/IMD6ArOMrPY?t=24805
August 12, 2023 Kili Bracket Round 3 Loss Judges Decision -1.00 180 https://youtu.be/4OYtS0Qtngw?t=29720

* Forfeits before the 2024 season are not counted in a bot's W-L record. Forfeits from 2024 and on are counted in a bot's W-L record.

For more information on how points are calculated for rankings, click here.

Click "Expand" to see this table.

Version 3.5 (July 2023 Redesign)

With the overall solid performance of Division's weapon system in 2022 but disappointing durability in 2023, a bunch of minor tweaks have been implemented in 2023. While there were few before May 2023, after both Labor Day Disarray in November 2022 and the March NHRL event, the Drivetrain was really struggling to hold up to modern horizonal spinners. The drivetrain now uses Just 'Cuz Robotics own DartBox drive brushed motors with AM32 brushed firmware ESCs. The weapon system was also updated slightly with AM32 firmware on the weapon ESC to improve startup torque and reliability.

Version 3 (2022 Redesign)

Division was always a mean robot to fight, but its explosive power proved to be its own downfall only a little less than half the time. With the V2.X archetype, repairs and maintenance were cumbersome, and with many retrofitted components taking the place of prior ones, the whole structure was really problematic in the end. At the end of 2021 it was retired officially, and a brand new from scratch redesign effort began,

Division V3 Drivetrain - This consists of a 3D printed Nylon motor mount, a 1/4" steel shoulder bolt dead axel, and nearly indestructible TPU hubs and Urethane tires.
Division V3 Drivetrain - Custom pinion gear on a Xing 2306 1700kV motor, driving a 3D printed Nylon spur gear coupled to a 3D printed TPU hub with an overmolded Urethane tire

The emphasis for Version 3.0 was reliability and reparability. The weapon motor, weapon ESC, drive ESCs, and weapons themselves are the only parts carried over into V3.0. The drive system was entirely overhauled and replaced with a system first prototyped on the control bot Shrapnel Mine (pictured). Shrapnel Mine proved the system could work, and it was able to survive hits far better than any foam wheels with metal hubs ever could. This design is intended to accomplish several things:

  1. The TPU wheels should survive multiple huge impacts without losing functionality, and absorb shock well
  2. The dead axel should never bend or break without other elements failing spectacularly first
  3. The single stage reduction is far lighter than a planetary gearbox, way cheaper, and more robust
  4. Custom molded 30A urethane tires have superior grip to foam wheels and most Banebots wheels
  5. More than 4X the drive power of even Fingertech Mega Sparks on 4S
  6. Every part can be easily serviced in minutes
This chassis part weighs about 6.5 ounces and is milled from a single 4lb solid block of 6061 Aluminum
Shrapnel Mine is a control bot with an articulating saw arm, but unlike other saw robots, the saw arm articulates along with a hinged par of front forks, with the intent to get under opponents, pin them against a wall, and saw into the undersides.
Shrapnel Mine (3lb) from Team Just 'Cuz Robotics

Another extremely huge experiment was with the chassis. In order to reduce the overall part count and fastener count while maintaining as much rigidity as possible for a given weight, a solid single part aluminum chassis was designed to be milled from a single block of metal. This chassis has numerous advantages compared to the prior structure.

  1. 1 Piece Construction, saving about 30 screws
  2. Much more rigid and less likely to permanently bend than prior baseplate
  3. Cost is only ~$22 of metal, outsourcing for about $62 each with sponsorship
  4. Upright mounting is vastly improved, and much better constrained square to the baseplate
  5. Uprights no longer need to be drilled and end tapped, and are now purely 2D lasercut parts
  6. Far greater design freedom with 3D vs 2D construction
  7. Far greater overall stiffness
  8. Solid single part metal connections, way stronger than Nylon printed parts and screws which frequently failed
  9. Integrated top panel screw holes, avoiding headaches with threaded standoffs in prior versions
  10. Rear threaded holes allow for modularity with future rear attachments

And many more!

Division V3.0 first entered the March 2022 tournament which exposed a few design flaws and sub optimal material choices. However, it worked as a proof of concept to show there was potential if the billet chassis were better protected. The weapon reliability was very good.

Division V3.1 fought in April with an added TPU rear protector, larger battery, and more durable drive mounts, and this proved extremely competitive with a 6-2 showing, beating several tough opponents (Sombra, Clyde, Spartan X, and Fully Defined). Still, the final fight with Lynx showed there were obvious areas for improvement with the drive system.

Division V3.2 was upgraded with even more durable Polypropylene drive mounts and rear armor, as well as a design change to the drive mount design to make it more easily serviced and more consistent to handle. This was also a test for a new tire molding compound that would adhere to the hubs much better, which while true, also wore down substantially after a few fights. Once again, Division lost to extremely competitive beater bar bots, but in four grudge matches it showed its true potential with dominant showings across the board. The reliability of the bot as a whole is very good, but there is still room for improvement.

Division V3.2 went on to compete at an event called Labor Day Disarray on September 3rd, 2022. Division had a great run at this event with 4 wins. Division beat May NHRL champion bot Crashfest twice, ultimately losing out to Caldera to earn a 2nd place podium spot, and winning the Most Destructive Bot award. Caldera was responsible for both of Division's losses at this event.

Notable Facts

Division stores about 700 joules of kinetic energy in its various weapons with tip speeds approaching 235mph max. However, due to the gyroscopic forces created at top speed and the loss of bite at high RPM, Seth constantly modulates the speed of the weapon while driving to ensure turning is manageable and the hits delivered are biggest when the opportunity arises.

As of 2022, Division has five interchangeable AR500 weapons, but the asymmetric Cutter Blade is the current favorite, having the ability to survive horizontal spinner hits and cut through soft plastic and aluminum armor with ease. Each weapon is roughly 200-255 grams. Fights with Division very rarely make it the full three minutes - it is designed to end fights fast and decisively.

Division V2.12 in 2021 had been rebuilt many times since Version 2.0, but only gotten a ground up redesign between 1.0 and 2.0. Since V2.0, the drivetrain and weapon system have both changed drastically, the armor package has moved from entirely aluminum to mostly titanium, and the entire system voltage was raised. Only the exterior resembled what it was back in 2019. It was sold off at the end of 2021 to fund a brand new build for Division V3.0 in 2022

Combat History

V2.7-V2.12 (2021)

Division lived on to fight through many tournaments both in and out of Norwalk. General reliability improvements to the weapon system were made using a DYS Aria 70A BlHelo32 weapon ESC with conservative programming, a Cobra 2814 1850kV weapon motor with a beefy 5mm shaft, and clamping pullies that slipped on the motor shaft to prevent shock loads from ruining the motors. This last change p[roved to be extremely problematic, however. Toward the end of its combat career, Division V2.X had at least four instances where the pulley axially slid down the motor shaft until it came in contact with Division's own weapon, tearing the motor loose from its mounting. The first time the motor came loose was against Eruption in Division's first fight ever using the Cobra motors. At Division V2.12's final tournament, it was given a brutal sendoff by fighting against more than 9 opponents at once in a rumble, knocking five out, losing its weapon motor entirely in the fray, before falling on its back, unable to self right, just 20 seconds from the end of the match.

V1.0, V2+ (2020)

Division V1.0 first competed at Norwalk Havoc in August 2019 with a blue color scheme. After that, with wins over multibot Sisyphus and The Rock, and Foiled Again, but losses to Trident and Scrambler, the design was completely overhauled for a V2. Division has continually been iterated after every competition. V2.0 competed at Norwalk Havoc in September 2019, and then upgraded versions competed at the Franklin Institute, SWORD Fall 2019, Norwalk in January 2020, and Motorama in February 2020 with version 2.7. In every competition besides Franklin Institute where Division went 0-2, it has had a record of at least 2-2 or better.

Since Motorama (February 2020), the drive was upgraded to a fully custom brushless solution, the rear armor was upgraded, and Carbon-Fiber Nylon or TPU 3D prints were added in place of some plain Nylon parts from past versions. The weapon ESC was upped from 50A to 70A-80A, and the battery was larger as well.

In the November 2020 NHRL Tournament, Division did not perform exactly as expected, although still achieving a 2-2 record against incredibly tough opponents. Many changes which were tested over and over again before the tournament and seemed perfectly reliable, failed unexpectedly and early in fights. Weapon reliability was the main issue as it broke in several ways in different fights. In the end the most repeated issue came down to the weapon motor vibrating itself loose, allowing it to slip in belt tensioning slots from its ideal position. The slack in the belt meant that the weapon spun up fine with little resistance, but lacked the torque to self right like it had proven to do in testing. While the robot suffered little to no real damage in the fights it lost, it was unable to get back onto its wheels and keep driving. The custom brushless drive and 3D printed wheel hubs, however, performed amazingly well, and the drive never failed, even with the wheels taking direct hits in three separate fights.

Select Fights

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