Build Your Own Combat Robot

Construction, cost factors in
large robot, 35–36
Construction techniques,
robot material and,
183–201
general machining
operations, 192–201
metals and materials,
184–193
when in doubt, built it
stout, 201
Contacts
NC (normally closed), 129
NO (normally open), 129
welded relay, 130
Contests
compete in fastestgrowing
robot, 277
competing in, 33
current rules and
regulations, 16
designing robots for
multiple, 23
what can go wrong
during, 34
Control
radio interference and
reliable, 170–173
relay, 128–139
variable speed, 139–155
Control channels, 160–166
50MHz radio frequency
band, 163
radio frequency crystals,
164–165
75MHz radio frequency
band, 163–164
72MHz radio frequency
band, 163
27MHz radio frequency
band, 162–163
United Kingdom radio
frequency bands, 164
Control of motors
bi-directional, 143
variable speed, 143
Control systems
must fulfill several
requirements, 158
traditional radio, 154
Controllers
adding, 317–319
cheaper hobby, 145
commercial electronic
speed, 143–155
4QD speed, 152–153
IFI Robotics Victor, 147
motor, 299–300
motor speed, 26
OSMC Motor, 153–155
speed, 172
Vantec Speed, 149–152
Victor 883 Speed,
147–149
Controller’s interface, RC, 159
Controlling
heat with ESCs, 73
motors with relays, 132
Controlling one’s motors,
127–155
relay control, 128–139
variable speed control
basics, 139–155
Controlling speed =
controlling voltage, 140
Controlling voltage, 140
Controls, traditional RC,
158–160
Conversion factors of
batteries, 86
Cool, keeping motors, 113
Coolrobots, Team, 44
Copper wire minimum
current ratings, AWG, 91
Cordless drill motors, 75
Cost considerations, 30
Cost factors in large robot
construction, 35–36
Countersinks, 198
Coupling, Lovejoy, 114
Creating
armor, 311–314
weapons, 311–314
Crimp style connectors,
339–340
Crusher bots, 231–233
crusher design, 231–233
strategy, 233
Crystals, frequency, 164–165
Current
batteries limiting amount
of, 72
fighting robots will draw
lot of, 81
no-load, 63, 64, 68
voltage stability for peak,
88–89
Current capacities in
batteries, estimating, 91
Current capacity in hobby
ESCs, 145
Current draw
measuring from batteries,
80–81
specifications from robot
motors, 26
using Ohm’s Law to
measure, 81
Current ratings, 129–131
AWG copper wire
minimum, 91
Cutting metal, 194
Cycle, duty, 141
Index 363