Page 364 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

Index 341

Erector Set, 39 foams, 42–44 G
Estimating Coefficient of Friction followers, 240–242
project, 81–83 food, creating power from,
Etsy.com, 278 116–117 gaffer tape, 69
events, cam, 241 force. See also input (effort gage thickness, of sheet
extension springs, 232–234 or force) metal, 40
extrusions, aluminum, 41 calculating spring Ganson, Arthur, 251
eyebolts, 62–63 stiffness, 118 gas welding, of metals, 70
calculating work, 2 gear ratios, DC gearhead
defining work, 97 motors, 133
F estimating torque, 74–75 gear type, standard hobby servo
free body diagrams motors, 136
fabrication illustrating, 85–88 gearboxes, 18
analog. See analog friction as. See friction gearheads
fabrication gear ratios when DC gearhead motors,
design for manufacture, magnifying, 22 131–133
256 measuring, 89–90 defined, 18
digital, 258, 274–276 Measuring Motor Torque gears
making things move project, 91–93 attaching to motor
ecosystem and, 257 relationship between shaft, 209
rule of pi in, 266–267 torque and, 74–75 belt or chain drives
face cams, 242 using machines to vs., 227
farad unit, capacitance, 113 multiply/change bevel, 20
fastening and joining parts direction of, 3 compound, 225–226
nonpermanent joints. See using wheel and axle to defined, 18
nonpermanent joints magnify, 15 equations for, 214–215
(fasteners) force multipliers, 7 idler, 225
overview of, 52 force reducers, 8–9 in Make Your Own Gears
permanent joints. See force-sensitive resistors project, 215–224
permanent joints (FSRs), 89 overview of, 212–214
fastening screws, 16 Forstner bits, 200 planetary, 21–22
fatigue failure, of materials, 36 four-bar linkages, 243 rack-and-pinion, 19–20
feet per second (ft/s), velocity, 14 free body diagrams, 84–88 ratios of, 22
Fender Blender, bicycle-powered, free fit, screws, 54 spur, 19
117–118 free length, compression springs, in Wind Lantern project,
finishing nails, 64 231–232 296, 300
first class levers, 3–7, 9 friction worm, 20–21
fish scales, measuring force, coefficient of, 80 gel cell batteries, 109
89–90 Estimating Coefficient of Geneva stops, 249
flag hoist, as open pulley Friction project, 81–83 glue
system, 11 free body diagrams attaching gears/other
flanged couplings, attaching illustrating, 85–88 components to
components to motors, 206 overview of, 77–81 shafts, 209
flatted motor shafts, 204–205 reducing, 83–84 in Not Lazy Susan
flexible shaft coupling, 208–209 friction drive, 10 project, 282
flexiforce pressure sensors, 90 friction-drive cranks, 239 wood, 46
fluids FSRs (force-sensitive Google Sketchup
defined, 115 resistors), 89 2D and 3D modeling
motorless motion ft/s (feet per second), for tool, 260
with, 184 velocity, 14 Unfold tool, 266
wind, water and other, fulcrum (pivot point) graffiti robots, 84–88
115–116 in first class levers, 3–7 grapes, squishing with wooden
Flying Pig, 46, 238, 247 as lever component, 3 power screws, 230–231
F=ma, 2 in second class levers, 7–8 Grashof’s law, and linkages, 244
foam core, 47 in third class levers, 8–9 gravity, in free body
foam tape, double-sided, 69 diagrams, 85