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National STEM Learning Centre and Network
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Make It Move: Linear Actuator
In this design challenge from the National STEM Learning Centre and Network, students make a linear actuator. The lead screw linear actuator uses a motor driven screw thread to move a threaded slider along its length. Limit switches turn off the motor when the slider reaches either end of its movement track.
Students must decide on which pulley system will enable the slider to move at a set speed. They need to consider:
* What are the likely outcomes of swapping the driver-driven pulleys to give a speed increase?
* What are the advantages and disadvantages of swapping the pulleys for spur gears with the same speed reduction ratio?
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Linear actuator (teachers' notes) 223.3 KB -
Linear actuator (activity sheet) 187.7 KB
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