ACM West Georgia Student Chapter

We will be attending Robot Battles 40 January 21-23 in Chattanooga at Chattacon 36. Travel and lodging will be provided by the school, along with entrance into Chattacon. For safety reasons attendees must be 21 Years or older. You must fulfill your selected roles to be able to attend the event.

This project will involve working with dangerous tools. Safety is paramount at all times. If you have questions do not hesitate to ask for help. We are building a killer robot, both killer as in bad ass, and killer as in Extremely Dangerous. Never operate twisty with the blade attached unless authorized to do so. Never operate any tools without the property safety equipment.

TwistyWeight: 3lbCurrent Weapon:

SumoTX: Arduino & Wii

Classic ControllerRX: ArduinoESC: Sabertooth

10A Dual Speed Controller

DriveTrain2 Banebots 28:1 6mm

MotorsTiming Pulleys set with

a rough gear ratio of 4:1

Speed to the Wheels: Roughly 6 mph

Mounting Hardware to attach hubs and timing pulleys to axelsSet Screws1/8” Key

Weapon

.5lb 7075 aluminum barSpeed: 2500 RPMJoules: 50 @ 2500 RPMPowered by Axi 2808 @

7.4vTiming pulley 3:1 ratio Keep it slow and keep it

heavy, We want a good bite and lots of force.

Twisty was originally Designed for the 3lb weight class as a horizontal spinner

Frame MaterialsAluminum 7075 1/8” Thick

Exceptionally strong, lightweight, aircraft alloy. Easy to machine and decently priced.

UHMW Polyethylene pillow blocks 3/8” thickBrinnell Rating: UnbreakableLightweight

Electronics“Brains”: Arduino Nano ProDrivetrain speed controller : Sabertooth

speed controllerWeapon speed controller: Patriot ESCBattery: LiPo * These are Dangerous, Follow

proper charging and handling proceduresWireless Communication: XBEE Modules

ESC <-> ArduinoESC’s accept PPM values between 1000 &

2000usSabertooth Brushed Motor Controller

1000us Full Reverse1500us Full Stop2000 Full Forward

Brushless Axi Motor Controller1000us Full Stop *EXTREMELY IMPORTANT2000us Full Forward

Arduino servo.writeMillis(1000);

Wireless XBEE CommunicationAT or API mode300 Feet Max RangeAT Mode

Raw data transfer over serialRequires custom buffer checks

APISuccessful Transfer ChecksCraft Custom Packets

ControllerReceiving XBEE

Hooked to ArduinoArduino Interfaced with

Wii Classic Controller over I2C

Classic Controller Poor Joystick Resolution

TasksUpdate to more efficient controlling systemUpgrade Armor for new weight classRedesign Weapon System to accommodate new

weight classRedesign Frame to accommodate for new weight

classPre-Match Checklist & Pre-Competition ChecklistCreate a Testing ArenaPractice DrivingDocument

Control System – Think Unconventional!Effective Use of ESC input values

Ideally control resolution of 211

Possible Controllers 360 Controller Using C# and XNA Hacked Atari Controller - Arduino Wii Balance Board - C#

Experiment with single stick drivingAI Control

Robot Vision, IR / Ultrasonic Sensor, Proximity Sensor

ArmorUltra-High Molecular

Weight Polyethylene (UHMW) All the way!RuggedImpact ResistantA pain to machinePurpose: Encase the

electronics

WeaponChoose Blade Material

The heavier the more energy stored

DimensionsSpeed based on weight and

shapeType

Drum Horizontal Spinner

Backup BladesAttach to axel

Redesign FrameConcepts To Consider

Type of materialThicknessSpace for electronicsTime to mill ~ 1

Month

ChecklistsPreCompetition Checklists

Better organized and ready with spare parts and needed tools

PreMatch ChecklistsEnsure Robot is ready to compete, no loose

screws, no controller issues

Practice DrivingEveryone will be able to drive the bot so

everyone will need to practice driving!Fights against non moving enemiesPractice in Mock Arena late NovemberFight against cheap r/c cars with extra armorExperiment with different controlling

schemes

The robot design process must be fully documented.

Building the bot must be repeatable!All steps need to be documented to

accommodate individuals with no prior robot building experience.

We can assume some programming experienceUpload to Moodle under Brandon’s Robot

Project. We will set up a new area soon.Use Version Control for software development

Proposed Project MilestonesRX Code & Frame Redesign – Oct 27th

Weapon Redesign & Armor Upgrades – Nov 10th

Mock Arena Build – Nov 12th - 15th

Checklists – Nov 24th

Follow Up MeetingsWe will need to meet occasionally to discuss

progress and any problems that may arise.Most information can be discussed during the

regular ACM meetingsExpect to meet again October 13th to discuss

finalized roles and things you will need to start working on these roles.

That’s It!

Thank you Again For Your Time!