GEARS

How Differential Gears Work video Great explanation []

from EDUCATE NXT PowerPoints

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FROM @http://stemrobotics.cs.pdx.edu/browse-content

AWESOME Gear Assembly Movies with voice instruction [] http://webclass.superquest.net/sboost/movies/index.htm

media type="custom" key="3652393"

=**LEARN ABOUT GEARS**= =**GEAR UP**= Big gear turns smaller gear Useful for increasing speed… … but reduces power One revolution of the big gear gives many revolutions of the small gear.

=**GEAR DOWN**= Small gear turns bigger gear Useful for increasing power… … but reduces speed One revolution of the small gear gives partial revolution of the large gear.

=**GEAR MATCHING**= One gear turns an identically-sized 2nd gear Useful for reversing direction… … but holding rotational speed and power constant A 3rd gear will return the original spin direction – try it!