Entropi

Entropi
Year Of Creation	2018-2019
Versions
Current Version	1.0
Wins/Losses	1/2
Information and Statistics
Weight Class	BeetleWeight
Weapon Class	Beater Bar Spinner
Combined Wins/Losses	1/2

Entropi is a 3lb beater bar battlebot, first of its kind constructed for Robojackets. It is designed around an aluminum chassis, steel weapon, and high density polyethylene armor. The image to the right is before the "combat ready" ugly modifications.

Competitions

Motorama 2019

• Results: 1/2
  • Bracket Style: Double Elimination
    • Loss vs Wedge of Allegiance, wedge bot
      • Wedge of Allegiance had steel plating, Entropi's drive motors were not working properly, screws where not Locktighted, Timed out from loss of controlled movement
      • (Observations: Weapon did minimal damage to opponents armor, screws began to unscrew from the chassis after full weapon spin up)
    • Win vs Crispi, GT Drum spinner
      • Crispi was heavily damaged before the fight, their drive motors were not working properly, repairs just finished before the match, Entropi had full control, screws were locktighted
      • short fight, match was surrendered by Crispi to be able to salvage the electronics from Crispi. This was after they lost total control of their bot.
    • Loss vs Scramble, Kit Beater bar
      • Scrambler is a beater bar built from a kit, with ABS armor, aluminum beater bar with steel teeth.
      • Clashes were mostly weapon to weapon, with a few hits into the flanks of either robot, with minimal effect. Entropi's loss of weapon function was due to the drive belt tearing, and the weapon moved within its retention hub, impacting one of the drive motors and disabling it. Entropi also had trouble driving inverted

RoboJackets 20th Anniversary Competition

• Results: 1/2
  • Bracket Style: Group Stage to Single Elimination Bracket
    • [Loss vs M.A.D., Undercutter Horizontal Spinner]
      • Both bots got one good hit in and both belts walked off the pulley forcing a pushing contest for the remainder of the fight.
      • (Observations: M.A.D. won in a close decision based on aggression. M.A.D. had better drive motors so they were able to push us around more.)
    • [Win vs Unlucki, GT Vertical Bar Spinner]
      • Fair fight where many hits were exchanged and the beater bar was able to contact with their vertical bar and disable their belt. After a couple more hits, Unlucki's drive was disabled and the bot was KO'd
    • [Loss vs Event Horizon, Undercutter Horizontal Spinner]
      • Good hits were exchanged initially with both bots taking damage. Eventually Event Horizon got a good hit by hooking the side plate and ripped the beater bar out of it's socket.

Versions

Entropi

Created by: Dylan Adriano, Maxwell Kazman, Bhuiyan Rifat al hadi, Connor Bradshaw, Prathic Sundararajan, Rajan Vivek, Ryan Chen

Drive Motors	DYS BE1806 2300KV Motors
Drive Motor Gearboxes	KITBOTS 1000rpm Gearmotor Gearboxes
Drive Motor Controllers	DYS 20A Micro Opto Multi-rotor ESC
Weapon Motor	Turnigy D3536/6 1250KV Brushless Outrunner Motor
Weapon Motor Controllers	(Weapon Motor Controller Name)
Receiver	Turnigy T6A-V2 AFHDS 2.4GHz 6Ch Receiver V2
Remote Control	Turnigy T6A-V2 AFHDS 2.4GHz 6Ch Transmitter V2
Battery	Turnigy Nano-Tech 1000mAh 3s 45~90c LiPo Pack

Problems

• screws did not have enough contact, too shallow threads
• tolerances between shaft and ball bearings resulted in shaking that caused screws to come out
• large regions of useless aluminum on side plates
• back plastic armor affected wheel contact
• screws on hub (4-40) too thin to handle impacts
• open access to electronics by spinning weapon
• small bearings
• NEVER TRUST THE DRIVE MOTORS

Good aspects

• side plastic armor for wheels prevented total destruction of wheel, lasted several hits from a kit beater bar
• rear plastic armor allowed robot to not become trapped on a flat surface without wheel coverage.
• heavy weapon and good weapon motor
• drive while inverted
• Sturdy axle
• compact, easy access to electronics
• low friction between axle and hub
• powerful motor (FWOOOOOSH)

Changes/Improvements

• increase depth of screws
• increase width of axle
• increase size of bearings
• increase weapon attachment screw diameter
• locktight screws
• install screws into top plate to hold armor down

Notes:

aka Horni, aka MrDestructoidi, aka Janki, aka Watermeloni

Name inspired by our mentor Thomas, and also because we are lazy