posted May 30, 2014, 12:48 PM by Michael Dreyfus-Pai
updated Sep 11, 2016, 3:00 PM by Karen McMillan
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:
- Smaller driving gear to larger driven gear
- Larger driving gear to smaller driven gear
- Configurations 1 and 2 with another gear in between (called an "idler")
- 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?