
32 Chapter 2 • Playing with Gears
similar, that is, but not identical.They have indeed some peculiarities which we
shall explore in the following paragraphs.
Chains, on the other hand, are not part of the basic MINDSTORMS kit.You
will need to buy them separately.Though not essential, they allow you to create
mechanical connections that share some properties with both geartrains and
pulley-belt systems.
Pulleys and Belts
Pulleys are like wheels with a groove (called a race) along their diameter.The
LEGO TECHNIC system currently includes four kinds of pulleys, shown in
Figure 2.16.
The smallest one (a) is actually the half-size bush, normally used to hold ...