3. Rotatability and Limit Positions

Try these first

1. 1.

   What is a rotatable link?

   Hint

   Think about the movement of a door.

2. 2.

   Define limit position.

   Hint

   Consider the maximum extent of a swing.

3. 3.

   What defines a rotatable link?

   • Can complete a full 180° turn
   • Can complete a full 360° revolution
   • Cannot rotate

   Hint

   Think about the motion you observe in items like doors.

4. 4.

   True or False: Limit positions prevent mechanisms from achieving motion.

   • True
   • False

   Hint

   Consider scenarios where a motion stops.

5. 5.

   Design a mechanism with at least three rotatable joints. Explain how you will ensure there are no locking situations.

   Hint

   Check your design against possible limit position scenarios.

6. 6.

   Evaluate a given mechanism's efficiency based on its rotatable links and limit positions. Propose improvements.

   Hint

   Consider practical applications of your design.