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Robotics Worksheet: DC and Servo Motors

Robotics lesson 12: DC motors and servo motors · Set 293 · 40 questions
TalentJR

Robot tip (Spin or point): DC motor: spins continuously; swap its wires to reverse it. Servo: goes to a set angle between 0° and 180°. Servo turn = bigger angle − smaller angle (30° to 120° = 90°). A program like angle = 90, angle = angle + 30 adds and takes away degrees in order.

NameDateTime takenScore ___ / 40
  1. 1.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 90°. Where does the arm point? (a) points left (b) points up and left (c) points straight up (d) points right
  2. 2.🦾 A servo moves from 100° to 160°. How many degrees does it turn?
  3. 3.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
  4. 4.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a buzzer (b) a servo motor (c) a DC motor (d) a fan
  5. 5.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
  6. 6.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
  7. 7.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
  8. 8.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a light sensor (c) a buzzer (d) a servo motor
  9. 9.🦾 A servo program runs:
    angle = 40
    angle = angle + 30
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
  10. 10.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
  11. 11.True or false: “reverses if wires swap” is true of a DC motor. (a) False (b) True
  12. 12.🦾 A servo program runs:
    angle = 160
    angle = angle − 10
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  13. 13.🦾 A servo moves from 150° to 60°. How many degrees does it turn?
  14. 14.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
  15. 15.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
  16. 16.🦾 A servo program runs:
    angle = 140
    angle = angle + 10
    angle = angle + 10
    angle = angle − 60
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  17. 17.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
  18. 18.🦾 A servo program runs:
    angle = 120
    angle = angle − 20
    angle = angle + 20
    angle = angle − 60
    To what angle (in degrees) does the servo turn in the end?
  19. 19.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
  20. 20.🦾 A servo program runs:
    angle = 170
    angle = angle − 60
    angle = angle − 20
    angle = angle − 10
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  21. 21.🦾 A servo program runs:
    angle = 70
    angle = angle − 50
    angle = angle + 20
    angle = angle − 40
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
  22. 22.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
  23. 23.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
  24. 24.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
  25. 25.🦾 A servo program runs:
    angle = 110
    angle = angle + 10
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
  26. 26.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 10° (d) 18°
  27. 27.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
  28. 28.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) True (b) False
  29. 29.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points up and right (b) points up and left (c) points left (d) points right
  30. 30.True or false: “has a signal wire” is true of a servo motor. (a) True (b) False
  31. 31.True or false: “turns to an exact angle” is true of a DC motor. (a) False (b) True
  32. 32.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
  33. 33.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
  34. 34.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
  35. 35.🦾 A servo program runs:
    angle = 160
    angle = angle − 10
    angle = angle − 60
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
  36. 36.🦾 A servo moves from 40° to 60°. How many degrees does it turn?
  37. 37.🦾 A servo program runs:
    angle = 40
    angle = angle − 30
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  38. 38.🦾 A servo program runs:
    angle = 70
    angle = angle − 30
    angle = angle + 30
    angle = angle − 10
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
  39. 39.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
  40. 40.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?

Answer key

  1. points straight up
  2. 60
  3. True
  4. a servo motor
  5. True
  6. a servo motor
  7. True
  8. a DC motor
  9. 50
  10. False
  11. True
  12. 120
  13. 90
  14. True
  15. False
  16. 90
  17. False
  18. 60
  19. a DC motor
  20. 120
  21. 40
  22. 250
  23. a DC motor
  24. a DC motor
  25. 90
  26. 180°
  27. a DC motor
  28. False
  29. points up and right
  30. True
  31. False
  32. False
  33. 300
  34. a servo motor
  35. 80
  36. 20
  37. 20
  38. 70
  39. False
  40. 50

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