Robot Building for Beginners, Third Edition

CHAPTER 5 ■ NUMBERS AND UNITS To avoid errors, the number of digits in long numbers is usually reduced in a standardized way. Re ...

CHAPTER 17 ■ DC MOTORS Efficiency Characteristic of DC Motors Regardless of how efficiently a robot utilizes a motor, the motor ...

CHAPTER 5 ■ NUMBERS AND UNITS A larger multiplier can be used, in which case the original number slides below the decimal point: ...

CHAPTER 17 ■ DC MOTORS Little noise ripples do exist even in the power-off state, but contrast them with the no-load spikes. Loo ...

CHAPTER 5 ■ NUMBERS AND UNITS Alternative for Greek Micro One last comment on powers-of-a-thousand: The abbreviation for million ...

CHAPTER 17 ■ DC MOTORS Summarizing the Characteristics of DC Motors When examining an advertisement or datasheet for a motor, he ...

CHAPTER 5 ■ NUMBERS AND UNITS Table 5-2. Units Common in Robotics Measurement Units Abbreviation Usually Refers To length or dis ...

CHAPTER 17 ■ DC MOTORS Gearhead motors almost always reduce the speed of the motor in exchange for increased twisting force (tor ...

CHAPTER 5 ■ NUMBERS AND UNITS However, as part sizes shrink, less space is available to print the component values directly on t ...

CHAPTER 17 ■ DC MOTORS Revealing Pairs of Smaller and Larger Gears A spur gear is a circle with pointy teeth on the perimeter. T ...

CHAPTER 5 ■ NUMBERS AND UNITS For example: 223 represents 22000, 501 represents 500, 475 represents 4700000. Any guesses as to w ...

CHAPTER 17 ■ DC MOTORS Describing Gear Ratios When all of the teeth of the larger gears have been added up, and all of the teeth ...

CHAPTER 5 ■ NUMBERS AND UNITS If the color table seems difficult to remember (the middle section is in rainbow order), a common ...

CHAPTER 17 ■ DC MOTORS Odd Gear Ratios Gear ratios rarely reduce exactly to the lowest term. This isn’t bad luck; it’s by design ...

CHAPTER 5 ■ NUMBERS AND UNITS Tolerance refers to how far away the part may be from the specified value. A 5% (gold) tolerance o ...

CHAPTER 17 ■ DC MOTORS The gear attached to the motor shaft has 12 teeth and it meshes with a larger gear that has 28 teeth. Tha ...

CHAPTER 5 ■ NUMBERS AND UNITS Figure 5-9. A multimeter shows the capacitor marked 10 mF is actually 11 mF An extra benefit of ch ...

CHAPTER 17 ■ DC MOTORS Stacking layers of planetary gears builds a full gearbox (see Figure 17-29). Just like a spur gearbox, th ...

CHAPTER 6 Robot Line-Following Sandwich, the robot featured in this book, is a robot that follows lines (see Figure 6-1). It’s a ...

CHAPTER 17 ■ DC MOTORS Moving Forward Hopefully you’ve now been exposed to enough information about DC brush and gearhead motors ...