Page 83 - Toucpad robotics C11

21 st
Century #Experiential Learning
A robot’s arm uses an actuator system to perform a series of Skills
delicate movements. The precision of the actuators is critical for accurate execution. How do
deep actuators contribute to a robot’s overall precision, and what factors should be considered when
thinking choosing actuators for different robotic applications?

21 st
LAB ACTIVITY Century #Coding & Computational Thinking
Skills
“Measure Degrees of Freedom of a Robotic Arm”
Tools: A toy robotic arm kit (or DIY cardboard arm with joints + servo motors + Arduino).
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Task: Count and test the DOF of the robotic arm.
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Steps:
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1. Assemble or simulate a robotic arm with joints (base rotation, elbow, wrist, gripper).

2. Connect each servo motor to Arduino.
3. Write code to rotate each servo by specific angles (e.g., 0°, 90°, 180°).
4. Observe how each joint adds a new degree of freedom.
Outcome: Students practically see how DOF and joints affect robot flexibility.
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Answers
Exercise (Solved)
A. 1. ii 2. iii 3. iii 4. ii 5. iii 6. ii 7. i 8. ii 9. i 10. iii
B. 1. Links 2. Joints 3. Degrees of freedom 4. Planar
5. Spatial 6. Payload 7. Workspace 8. Omni
9. Low-cost 10. Base or Chassis
C. 1. False 2. False 3. True 4. True
5. False
D. 1. d. 2. b. 3. c. 4. a. 5. e.

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Mechanical System