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Robotics 1: Gears

posted May 28, 2014, 9:58 AM by Michael Dreyfus-Pai   [ updated May 28, 2014, 10:15 AM ]
For our first lesson in robotics, we're going to play around with some gears.  Each group will get a kit of parts, including:
  • 4 gears (different sizes)
  • 1 plate or bar
  • 2-4 axles
  • 4 bearing flats
  • 8 pop-rivets
  • 2 hexagonal standoffs
  • 2 screws
  • 4-8 collars
  • 2 allen keys (different sizes
Using these parts, connect a series of gears in the following configurations:
  1. Smaller driving gear to larger driven gear
  2. Larger driving gear to smaller driven gear
  3. Configurations 1 and 2 with another gear in between (called an "idler")
  4. Same size gears
Use the standoffs as hand cranks to turn the gears and observe the motions. For each configuration, observe the following:
  • Which goes faster, the driving gear or the driven gear?
  • How are the directions of the driving gear and the driven gear related?
  • Which takes less power to turn, a big gear driving a small gear or vice versa?

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