Page 371 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

348 Making Things Move

Seasonally Affected Drawing 600:1 mechanical advantage, specialty screws, 62–63
Robot. See SADbot project power screws, 229 specifications
second class levers, 7–9 size, increasing motor shaft, 207 continuous rotation hobby
seesaws, as first class levers, 3–5 sketching, 258 servos, 136
self-drilling screws, 62 Skybike, 71 DC gearhead motors, 133
self-tapping screws, 62 SLA (stereolithography), 276 DC toy motors, 129–131
semiconductors, 47 sleeves. See bushings linear motors, 142–143
servo motors. See also hobby SMA (shape memory alloy), standard hobby servo
servos, 133 185–186 motors, 135–136
ServoCity, 204, 206 SmallParts clutches, 210–211 speed
set screws Smith, Sam, 251 Control Speed using
defined, 62–63 Smooth-Cast 300, casting Hardware PWM project,
rigid shaft couplers in style with, 272 158–162
of, 208 socket head screws, 60 Control Speed using
shaft adaptors, for rotating software PWM project, Software PWM project,
tabletop, 285–286 controlling speed using, 163–168
shaft collars 163–168 control with PWM,
overview of, 211–212 solar energy 156–157
in Wind Lantern project, overview of, 115 gear ratios when
296, 298–299, 301 for rechargeable magnifying, 22
shafts, motor batteries, 112 magnifying with
attaching components to, Seasonally Affected machines, 3
205–207 Drawing Robot using. magnifying with wheel
attaching gears and See SADbot project and axle, 15
components to, Solarbotics DC gearhead velocity and, 14
209–210 motor, 132 spherical bearings, 199–200
attaching to other shafts, soldering spiral springs, 236
207–209 in Not Lazy Susan project, spline, 209–210
D-shaped or flatted, 289 spray mount, in analog
204–205 power supply connector translation, 265
increasing size of, 207 for breadboard, 328 spring-lock washers, 64, 235
SADbot project, 314–315 Solder a Circuit project, spring rate or stiffness,
shape memory alloy (SMA), 146–149 compression springs, 231
185–186 uses of, 71 spring scales, 89
Shapeways. com, 278 solderless breadboards, for springs
shear stress, of materials, 35 prototyping, 71, 144 compression, 231–232
sheaves, 9 solenoids elastic energy storage
sheet metal snips, 271 overview of, 143 and, 118
shelving standards, rotary, 141 leaf, 236
aluminum, 41 solid height, compression in MouseTrap-Powered
shield springs, 231–232 Car project, 119–121
in bearings, 193 solid wire, 151 spiral, 236
in thrust bearings, 197 SolidWorks modeling tool, tension/extension,
shims, 207 261–262 232–234
shoulder screws, 62–63 solvents, fastening with, 68 torsion, 234–235
shoulder torque, 75–77 SparkFun usefulness of, 231
Silicon Solar, 115 breadboard power supply, sprockets, and chains,
silicone, 47, 272 328 228–229
silver, 42, 71 computer power supply, spur gears
Sin (angle), estimating 110–111 overview of, 19
torque, 76 polymer lithium-ion planetary gears as, 21–22
single pole, single throw on/off battery, 110 rack-and-pinion gears as,
toggle switch, 146–147 sensors, 89–90 19–20
6:1 mechanical advantage, axe solar cell, 115 worm gears meshing with
splitting wood, 16 variable benchtop supply, teeth of, 20–21
105–106 squish distance, 118