Build Your Own Combat Robot

More documents

Recommendations

Info

FIGURE 7-13 Associated Runner Plus hobby ESC and Innovation First Victor 883 speed controller. Victor 883 Speed Controller Chapter 7: Controlling Your Motors 147 A more serious option is the Innovation First (IFI) Robotics Victor 883 speed controller (www.ifirobotics.com). The Victor 883 is an offshoot of technology developed for the FIRST robotics competition. The competition needed a heavy-duty speed controller, usable for drive motor or actuator duty, that would fit in a small space and lend itself to high design flexibility. Built like a hobby-grade controller “on steroids,” the IFI Robotics Victor has a built-in cooling fan and uses three FETs in parallel for each leg of its motor control H-bridge, for a total of 12 FETs. Figure 7-13 shows the Victor 883 alongside a hobby ESC. The IFI Robotics Victor controller can handle 60 amps of continuous current and up to 200 amps for short duration, and it is designed for up to 24-volt motors. Because the Victor 883 was designed specifically for competition robot use, it gives consistent and matched performance in forward and reverse. The Victor was originally designed to be used exclusively with the IFI Robotics Isaac radio control gear. Following marked demand, IFI Robotics released a new version of the controller that is compatible with hobby-grade radio gear. Some R/C receivers, such as the Futaba receivers, do not deliver enough current to drive the opto-couplers in the Victor 883. Because of this, IFI Robotics sells an adapter that boosts the signal. Knowing whether your radio will need the signal booster or not
148 Build Your Own Combat Robot FIGURE 7-14 Block diagram of the Victor 883 electronic speed controller. is difficult without testing it—simply buying the booster cable and using it is probably the best idea. Like a hobby-speed controller with a battery eliminator circuit, the Victor 883 controller uses a voltage regulator to produce a 5-volt power source for its control logic. But, unlike the hobby-grade controllers, the Victor 883 does not feed power back to the radio receiver, and uses an opto-isolator for full electrical isolation between the controller and the radio to prevent electrical noise generated by the motors from getting into the receiver power circuit. Figure 7-14 shows a block diagram of the Victor 883 electronic speed controller. The electronics on the Victor 883 are contained on a single small circuit board, which is encapsulated inside a sealed plastic housing. The controller is highly impact resistant and does not need special mounting to be safe from impact shocks, although it’s still a good idea to protect all onboard electronics from large shocks. Take care to ensure that the cooling fan has access to ambient air; the 60 amps continuos rating assumes that the fan has a constant source of external room-temperature air to blow over the FETs. Sealing a Victor 883 inside a box will have it circulating the same air over the cooling surfaces again and again, which will reduce the effective current capacity. As a final safety measure, Victor 883 controllers ship with auto-resetting 30-amp thermal breakers. Intended to be wired in series with the motor, these heat up and disconnect the power at a current rating well under what the controller itself can handle. After a few seconds, the breaker will cool off and reconnect the motor. While these will ensure that the controller will not be damaged by over currents or shorts, they effectively cut in half the maximum current that the controller can source. While most motors used by robots in weight classes under 60 pounds usually don’t draw more that 30 amps continuous, many motors in the larger
Page 2 and 3:
Build Your Own Combat Robot Pete Mi
Page 4 and 5:
For more information about this boo
Page 6 and 7:
Contents For more information about
Page 8 and 9:
Current Ratings, 129 How It All Wor
Page 10 and 11:
Object Detector, 290 Sensor Integra
Page 12 and 13:
Acknowledgments We would like to th
Page 14 and 15:
Introduction Some kids spend their
Page 16 and 17:
About the Authors xv About the Auth
Page 18:
This page intentionally left blank.
Page 21 and 22:
2 ELCOME to the world of combat rob
Page 23 and 24:
4 Build Your Own Combat Robot FIGUR
Page 25 and 26:
6 Build Your Own Combat Robot aroun
Page 27 and 28:
8 Build Your Own Combat Robot FIGUR
Page 29 and 30:
10 Build Your Own Combat Robot Pinb
Page 31 and 32:
12 Build Your Own Combat Robot FIGU
Page 33 and 34:
14 Build Your Own Combat Robot Seas
Page 35 and 36:
16 Build Your Own Combat Robot Robo
Page 37:
18 Build Your Own Combat Robot In t
Page 41 and 42:
22 S we said in Chapter 1, it’s g
Page 43 and 44:
24 Build Your Own Combat Robot Even
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
30 Build Your Own Combat Robot Befo
Page 51 and 52:
32 Build Your Own Combat Robot What
Page 53 and 54:
34 Build Your Own Combat Robot Test
Page 55 and 56:
36 Build Your Own Combat Robot S af
Page 57:
38 Build Your Own Combat Robot Ther
Page 61 and 62:
42 OVING is what many might call a
Page 63 and 64:
Page 65 and 66:
46 Build Your Own Combat Robot Bot
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
52 Build Your Own Combat Robot You
Page 73 and 74:
Page 75 and 76:
56 Build Your Own Combat Robot Thro
Page 77 and 78:
Page 80 and 81:
chapter Motor Selection and Perform
Page 82 and 83:
Chapter 4: Motor Selection and Perf
Page 84 and 85:
FIGURE 4-1 Typical motor performanc
Page 86 and 87:
Determining the Motor Constants Cha
Page 88 and 89:
FIGURE 4-2 Heat generated in an ele
Page 90 and 91:
FIGURE 4-4 Motor power changes by d
Page 92 and 93:
Chapter 4: Motor Selection and Perf
Page 94 and 95:
FIGURE 4-7 24-volt, 185 rpm, 896 in
Page 96:
the robot. If the engine is used to
Page 99 and 100:
80 LECTRICALLY powered competition
Page 101 and 102:
82 Build Your Own Combat Robot the
Page 103 and 104:
Page 105 and 106:
86 Build Your Own Combat Robot Comp
Page 107 and 108:
Page 109 and 110:
90 Build Your Own Combat Robot Batt
Page 111 and 112:
92 Build Your Own Combat Robot You
Page 113 and 114:
94 Build Your Own Combat Robot Hawk
Page 115 and 116: 96 Build Your Own Combat Robot FIGU
Page 117 and 118: 98 Build Your Own Combat Robot Alka
Page 119: 100 Build Your Own Combat Robot Ins
Page 123 and 124: 104 NE of the most important consid
Page 125 and 126: 106 Build Your Own Combat Robot Gra
Page 127 and 128: 108 Build Your Own Combat Robot FIG
Page 131 and 132: 112 Build Your Own Combat Robot Loc
Page 137 and 138: 118 Build Your Own Combat Robot Bel
Page 139 and 140: 120 Build Your Own Combat Robot V-B
Page 141 and 142: 122 Build Your Own Combat Robot Mou
Page 143: 124 Build Your Own Combat Robot Pla
Page 147 and 148: 128 F batteries are the source of p
Page 153 and 154: 134 Build Your Own Combat Robot Dri
Page 159 and 160: 140 Build Your Own Combat Robot Rel
Page 161 and 162: 142 Build Your Own Combat Robot are
Page 165: 146 Build Your Own Combat Robot You
Page 171 and 172: 152 Build Your Own Combat Robot Lik
Page 173 and 174: 154 Build Your Own Combat Robot At
Page 176 and 177: chapter Remotely Controlling Your R
Page 178 and 179: FIGURE 8-1 Wiring and rotational po
Page 180 and 181: FIGURE 8-2 Futaba’s top of-the-li
Page 182 and 183: Chapter 8: Remotely Controlling You
Page 184 and 185: FIGURE 8-4 Typical radio frequency
Page 190 and 191: FIGURE 8-5 Motor with three capacit
Page 194 and 195: Innovation First Isaac Robot Contro
Page 196 and 197: FIGURE 8-6 Block diagram of Isaac o
Page 202 and 203: chapter 9 Robot Material and Constr
Page 204 and 205: Metals Aluminum Chapter 9: Robot Ma
Page 206 and 207: Stainless Steel Chapter 9: Robot Ma
Page 208 and 209: Titanium used to solder small brass
Page 210 and 211: Chapter 9: Robot Material and Const
Page 212 and 213: Chapter 9: Robot Material and Const
Page 214 and 215: Welding, Joining, and Fastening We
Page 216 and 217:
place, or some liquid may have ente
Page 218 and 219:
Chapter 9: Robot Material and Const
Page 220:
vibration and bounce around the ins
Page 223 and 224:
204 ECAUSE robot combat has evolved
Page 225 and 226:
206 Build Your Own Combat Robot Thi
Page 227 and 228:
208 Build Your Own Combat Robot Wed
Page 229 and 230:
210 Build Your Own Combat Robot Wed
Page 231 and 232:
212 Build Your Own Combat Robot Str
Page 233 and 234:
214 Build Your Own Combat Robot FIG
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Page 255:
Page 259 and 260:
240 HE robots described in the book
Page 261 and 262:
242 Build Your Own Combat Robot Pas
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
248 Build Your Own Combat Robot tub
Page 269 and 270:
250 Build Your Own Combat Robot One
Page 271 and 272:
Page 273 and 274:
Page 275 and 276:
Page 278 and 279:
chapter 12 Robot Brains Copyright 2
Page 280 and 281:
FIGURE 12-1 From top left to bottom
Page 282 and 283:
Chapter 12: Robot Brains 263 space
Page 284 and 285:
FIGURE 12-2 The BoeBot from Paralla
Page 286 and 287:
Handy Board BotBoard Chapter 12: Ro
Page 288 and 289:
FIGURE 12-5 Robo-Goose, a robotic g
Page 290 and 291:
FIGURE 12-8 A fully autonomous robo
Page 292:
S ummary Chapter 12: Robot Brains 2
Page 295 and 296:
276 HE referee signals, and my hear
Page 297 and 298:
278 Build Your Own Combat Robot In
Page 299 and 300:
Page 301 and 302:
Page 303 and 304:
Page 305 and 306:
286 Build Your Own Combat Robot lef
Page 307 and 308:
Page 309 and 310:
290 Build Your Own Combat Robot nex
Page 311 and 312:
292 Build Your Own Combat Robot Onc
Page 313 and 314:
Page 315 and 316:
296 Build Your Own Combat Robot b2
Page 317 and 318:
Page 319 and 320:
300 Build Your Own Combat Robot abo
Page 321 and 322:
302 Build Your Own Combat Robot has
Page 324 and 325:
chapter 14 Real-Life Robots: Lesson
Page 326 and 327:
FIGURE 14-1 Chew Toy Chapter 14: Re
Page 328 and 329:
FIGURE 14-2 Chew Toy with protectiv
Page 330 and 331:
FIGURE 14-3 Wheel shown bolted to d
Page 332 and 333:
FIGURE 14-5 Front view with arm dow
Page 334 and 335:
Final Words Chapter 14: Real-Life R
Page 336 and 337:
Chapter 14: Real-Life Robots: Lesso
Page 338 and 339:
Page 340 and 341:
design all the parts, and Dave did
Page 342 and 343:
FIGURE 14-12 The 4-inch-tall alumin
Page 344 and 345:
FIGURE 14-15 Internal view of Live
Page 346:
Page 349 and 350:
330 The Future of Robot Combat The
Page 351:
Page 355 and 356:
336 NLESS you’re building an exac
Page 357 and 358:
338 Build Your Own Combat Robot ■
Page 359:
Page 363 and 364:
344 S promised, following are some
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
350 Build Your Own Combat Robot Mic
Page 371:
Page 375 and 376:
356 OLLOWING are formulas that you
Page 377 and 378:
358 Index 1BDI, 272 1/4 wave antenn
Page 379 and 380:
360 Build Your Own Combat Robot Bea
Page 381 and 382:
362 Build Your Own Combat Robot fin
Page 383 and 384:
364 Build Your Own Combat Robot D D
Page 385 and 386:
366 Build Your Own Combat Robot rad
Page 387 and 388:
368 Build Your Own Combat Robot sec
Page 389 and 390:
370 Build Your Own Combat Robot var
Page 391 and 392:
372 Build Your Own Combat Robot Sha
Page 393 and 394:
374 Build Your Own Combat Robot RFI
Page 395 and 396:
sources of robot parts, 35 top ten
Page 397 and 398:
378 Build Your Own Combat Robot Spo
Page 399 and 400:
380 Build Your Own Combat Robot U U
Page 401:
INTERNATIONAL CONTACT INFORMATION A
show all

Build Your Own Combat Robot

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?