Build Your Own Combat Robot

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FIGURE 1-4 The vicious-looking Razer has been a crowd favorite for several years running at the U.K. Robot Wars. (courtesy of Vincent Blood) Walking robots get an extra 20-percent weight increase bonus, so the weight classes for walking bots are 72 pounds for lightweights, 144 pounds for middleweights, 264 pounds for heavyweights, and 408 pounds for superheavyweights. All of the details about BattleBots, including rules and regulations, can be found online at www.battlebots.com. Robot Wars Chapter 1: Welcome to Competition Robots 9 Robot Wars is where it all began—two robots fighting to the death. In the early days of Robot Wars, there was an arena filled with hazards, including spikes, buzz saws, and a swinging bowling ball. Robots fighting in this competition had to avoid the hazards while attacking opponents. Not only were there remote-control robots fighting, there were also autonomous machines competing. Since Robot Wars moved to the United Kingdom in 1997, the event has changed quite a bit. Before the bots get a chance to go to the big fight, they now have to pass a series of obstacle course tests. These obstacles include crashing through brick walls, climbing over teeter-totters, passing between two closing walls with spikes, avoiding large pendulums, knocking over large metal drums, and steering clear of fiery pits.
10 Build Your Own Combat Robot Pinball Sumo Soccer To make the events a little more challenging, the contestant bots have to contend with “house” bots whose main purpose is to destroy anything fool enough to come near them. The smallest house robot is Shunt. At 231 pounds., this powerhouse can pull a Land Rover and wield a deadly axe. Dead Metal, weighing in at 247 pounds., is very effective at using its buzz saw and deadly pincers. The 256 pound titaniumarmored Matilda wields a chain saw on her rear, and the 264 pound Sergeant Bash with his deadly flamethrower can cook his victim when it gets caught in his front pincers. Finally, there is Sir Killalot, at a massive 617 pounds. His pincer claws can cut through the toughest armor and then lift a 220- pound hapless victim—to be dropped into the fiery pit. The lucky winners of the obstacle courses get to move on to bigger and better fights. Below is a list of three of the most popular events that bots must pass in more advanced Robot Wars competitions, prior to moving on to the final round: In the pinball tournament, bots must navigate around a course and hit certain objects, each of which is worth a different number of points. The bot with the most points wins the tournament. Bots score 5 points for hitting barrels, 10 points for the multiball, and 5 points for each multiball in the pit. Crossing over the ramp is worth 20 points, going through the car door gate is worth 25 points, and moving the sphere out of the pit is worth 25 points. Hitting Matilda’s and Sergeant Bash’s guarded targets are worth 50 points each, and getting past Dead Metal to its target is worth 75 points. All of this must be accomplished in 5 minutes. The Sumo event is held on an elevated ring, and the contestant bot goes up against a house bot. This is a timed event to see how long a bot can stay in the ring before being pushed off by the house bot. Most of the time, the house robot wins this event, but once in a while a challenger will be successful in pushing a house bot to its doom. The bot with the longest time on the sumo ring wins that event. Robot Soccer is an event where two bots try to push a white ball into the other bot’s goal. A house bot is positioned in the arena to assist in the game. “Assist” is a relative term because the house bots have a tendency to capture the ball, thus leaving the other two bots to fight. Once the time limit expires, a judge determines which robot is the winner. Robot Wars has several other events that are less common, one of which is the Grudge Match. In this competition, if your bot has a grudge against another bot—including a house bot—it gets the opportunity to fight that bot one on one.
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Page 6 and 7: Contents For more information about
Page 8 and 9: Current Ratings, 129 How It All Wor
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Page 14 and 15: Introduction Some kids spend their
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chapter Motor Selection and Perform
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Chapter 4: Motor Selection and Perf
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FIGURE 4-1 Typical motor performanc
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Determining the Motor Constants Cha
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FIGURE 4-2 Heat generated in an ele
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FIGURE 4-4 Motor power changes by d
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Chapter 4: Motor Selection and Perf
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FIGURE 4-7 24-volt, 185 rpm, 896 in
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the robot. If the engine is used to
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80 LECTRICALLY powered competition
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104 NE of the most important consid
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128 F batteries are the source of p
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chapter Remotely Controlling Your R
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FIGURE 8-1 Wiring and rotational po
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FIGURE 8-2 Futaba’s top of-the-li
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Chapter 8: Remotely Controlling You
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FIGURE 8-4 Typical radio frequency
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FIGURE 8-5 Motor with three capacit
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Innovation First Isaac Robot Contro
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FIGURE 8-6 Block diagram of Isaac o
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chapter 9 Robot Material and Constr
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Metals Aluminum Chapter 9: Robot Ma
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Stainless Steel Chapter 9: Robot Ma
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Titanium used to solder small brass
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Chapter 9: Robot Material and Const
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Welding, Joining, and Fastening We
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place, or some liquid may have ente
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vibration and bounce around the ins
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204 ECAUSE robot combat has evolved
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240 HE robots described in the book
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248 Build Your Own Combat Robot tub
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250 Build Your Own Combat Robot One
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chapter 12 Robot Brains Copyright 2
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FIGURE 12-1 From top left to bottom
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Chapter 12: Robot Brains 263 space
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FIGURE 12-2 The BoeBot from Paralla
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Handy Board BotBoard Chapter 12: Ro
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FIGURE 12-5 Robo-Goose, a robotic g
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FIGURE 12-8 A fully autonomous robo
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S ummary Chapter 12: Robot Brains 2
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276 HE referee signals, and my hear
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chapter 14 Real-Life Robots: Lesson
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FIGURE 14-1 Chew Toy Chapter 14: Re
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FIGURE 14-2 Chew Toy with protectiv
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FIGURE 14-3 Wheel shown bolted to d
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FIGURE 14-5 Front view with arm dow
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Final Words Chapter 14: Real-Life R
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Chapter 14: Real-Life Robots: Lesso
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design all the parts, and Dave did
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FIGURE 14-12 The 4-inch-tall alumin
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FIGURE 14-15 Internal view of Live
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330 The Future of Robot Combat The
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336 NLESS you’re building an exac
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338 Build Your Own Combat Robot ■
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344 S promised, following are some
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350 Build Your Own Combat Robot Mic
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356 OLLOWING are formulas that you
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358 Index 1BDI, 272 1/4 wave antenn
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sources of robot parts, 35 top ten
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INTERNATIONAL CONTACT INFORMATION A
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