November 2007
Beginner
320 pages
11h
English
Content preview from The Unofficial LEGO MINDSTORMS NXT Inventor's Guide
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44 CHAPTER 4
other gears
I’ve included the final three types of gears in this category:
the worm gear, the knob wheel, and the turntable. For vari-
ous reasons, we don’t include measurements as part of their
names.
The worm gear can engage all the toothed gears in
the NXT set, but only when they’re positioned on skewed
axles. Figure 4-28 illustrates how a worm gear meshes with
another gear, in this case, a 24t gear. While rotating, the
worm gear’s teeth (or tooth as you’ll learn in Chapter 6) slide
across the other gear’s teeth to make the other gear rotate.
Interestingly, the worm gear must always turn the other
gear, which the arrow in Figur
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