Page 370 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

Index 347

SADbot. See SADbot rated current, in stepper rotating tabletop, Not Lazy
project motors, 138 Susan project, 285–288, 293
Solder a Circuit, 146–149 rated voltage, in stepper rotation, 23
Wind Lantern. See Wind motors, 137 rotational velocity (ω), 14, 97
Lantern project rechargeable batteries round parts, in analog
proliferation alkalines, 108 fabrication, 271
analog and digital, 278 lead-acid, 109 rps (revolutions per second), in
making things move lithium, lithium-ion, and rotational velocity, 14
ecosystem and, polymer lithium-ion, rubbers, 42–44
256–257 109–110 Rube Goldberg Breakfast
overview of, 276–278 nickel-cadmium, 109 Machine project, 26–30
properties nickel-metal hydride, 108 rule of pi, 266
of materials, 34 solar, 112 runners (unfixed pulleys), 12
of natural woods, 44 reciprocating motion, 239,
prototyping stage 247–248
CAD software for, 258 redundant constraint design, S
power, 105–106 15, 25
using LEGO in, 258 regulated benchtop power SADbot project
PTFE (polytetraflourethylene), supplies, 105 overview of, 305–306
195 resistance (R). See also output recipe, 307–325
pulleys (load or resistance) shopping list, 306–307
belts and timing, 228 electricity and, 101 safety, when cutting, 46, 272
closed systems, 9–11 Ohm’s law and, 103 sails, Wind Lantern project,
defined, 9 Restriction of Hazardous 301–302
open systems, 11–13 Substances (RoHS) scales, measuring force, 89
overview of, 227–228 directive, 71 scaling, with pantographs, 244
standard belts and, 228 retaining rings, fastening scissor linkages, 244
pulse-width modulation (PWM) with, 65 scissors
Control Speed using revolutions per minute (rpm), cutting with, 271
Hardware PWM project, bearings, 193 as first class lever, 6
158–162 revolutions per second (rps), scotch yoke, in motion
Control Speed using rotational velocity, 14 conversion, 247
Software PWM project, Rhino 3D modeling tool, screw jacks, mechanical
163–168 261, 266 advantage of, 16–17
speed control with, Rhino 3D OSX modeling screwdriver, as first class lever, 6
156–157 tool, 261 screws
PVC plastic, 43 rigid shaft couplers, 208 attaching component to
rivet nuts, 63 hobby servos, 204
rivets/rivet tools, 69–70 attaching
Q RoHS (Restriction of Hazardous gears/components to
Substances) directive, 71 shafts, 210
QCAD tool, 259–260 roll, in rotation on airplane, 24 drilling and tapping holes,
quick returns, motion conversion roller bearings 57–59
with, 249 alternatives to, 198–200 head and drive styles,
defined, 191 59–61
R linear, 197 major diameter and
threads per inch of,
radial, 192–194
uses of, 194 53–56
rack-and-pinion gears, 19–20 rotary actuators materials for, 62
radial bearings AC motors, 139–141 in Not Lazy Susan
defined, 190 DC motors. See DC project, 293
overview of, 191–192 motors overview of, 16–18, 53
radial ball and roller rotary selenoids, 141 power, 229–231
bearings, 192–194 types of, 127–128 threaded rods and
radial bushings, 191, 195 rotary motion. See also specialty, 62–63
radial cams, 242 machines, combining simple, in Wind Lantern project,
radial motion and forces, 24 246–248 299–300
ramps, 15–16 rotary selenoids, 141 seal, bearing, 193
ratchet and pawl, 246