Page 369 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

346 Making Things Move

parts, making assemblies of, drilling pilot hole for power tools
262–264 screws in, 55 for plastics, 273–274
patents, 277 glues made for, 67 for wood, 273
patina, of copper, 41 overview of, 42–44 press fit
pawl and ratchet, 246 plate cams, 242 attaching components to
Pepakura Designer, 266 plug-in power options, motor, 206
peripheral cams, 240–241 110–111 attaching components to
permanent joints plywood, 44 shafts, 209
adhesives, 66–69 PMMA, as biomaterial, 47 pressure angle, of spur
brazing, 71 pneumatics gears, 214
defined, 66 defined, 115 printers
rivets, 69–70 motorless motion in 2D digital
soldering, 71 with, 185 fabrication, 274
welding, 70–71 polycarbonate (Lexan), 43 in 3D digital fabrication,
PETG plastic, 43 polymer lithium-ion batteries, 275–276
Phillips head screws, avoiding 109–110 Pro/ENGINEER modeling tool,
stripping, 60 polymers. See plastics (polymers) 261–262
photocells, SADbot project, polytetraflourethylene projects
309–325 (PTFE), 195 Agreeable Sheep
phototransistor, Not Lazy Susan Ponoko.com, 278 automaton project,
project, 289–293 portable drills, in analog 253–254
pillow blocks (mounted bearings) fabrication, 267–268 Basic DC Motor Control,
in Not Lazy Susan ports, and Arduino, 332 145–146
project, 284 positive drive, 10 Breadboard A Circuit,
working with, 200, 202 potential energy, 96 150–152
pilot holes, for screws, 55 power Control a Bipolar Stepper
pinch-clamp, attaching converters, 111 Motor, 175–180
components to shafts electrical, 98–104 Control Speed using
with, 210 mechanical, 96–97 Hardware PWM,
pinions, 19, 22 overview of, 96 158–162
pins, fastening with, 65, to your breadboard, Control Speed using
209–210 328–329 Software PWM,
pitch power screws, 16–18, 229–231 163–168
defining for screws, 53 power, sources of Control Standard Hobby
as rotation on alternative energy. See Servos, 170–173
airplane, 24 alternative energy Different Diving Boards,
pitch diameter (D), spur gears sources 48–49
defined, 212 batteries, 106–110 DIY Motor with Magnet
gear equations, 214 computer power supplies, Wire, 124–127
Make Your Own Gears 110–111 Estimating Coefficient of
project, 215–223 mousetrap-powered car Friction, 81–83
overview of, 19 project, 119–121 Heart Pantograph,
pivot point. See fulcrum (pivot overview of, 104–105 245–246
point) power converters, 111 Make Your Own Gears,
plain. See bushings springs and elastic energy 215–224
plain bore, 206 storage, 118 Measuring Motor Torque,
planar linkages, 243 variable benchtop supply, 91–93
planers, 272–273 105–106 Motor About-Face,
planetary gears, 21–22 power supplies 153–156
plastics (polymers) Adafruit’s adjustable, 328 MouseTrap-Powered Car,
in analog fabrication, computer, 110–111 119–121
273–274 SparkFun’s breadboard, Not Lazy Susan. See Not
do-it-yourself shaping 328 Lazy Susan project
of, 44 variable benchtop, references, 326
drilling into, 267 105–106 Rube Goldberg Breakfast
Machine, 26–30