December 2001
Intermediate to advanced
448 pages
18h 49m
English
Content preview from Building Robots With Lego Mindstorms
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46 Chapter 3 • Controlling Motors
The micromotor (c) is a geared motor as well. It’s geared down so much that
its output shaft turns at approximately 30 rpm. Nevertheless, its torque is incred-
ibly low, well below 1 Ncm. It is also surprisingly noisy, and very easy to jam. At
this point, you might wonder why you should ever consider this motor, but the
answer lies in its name: because it’s micro.There are situations where the size of
the motor is more critical than the amount of torque and speed needed.To be
used, it requires some special mounting brackets, and a small pulley to connect to
its shaft (Figure 3.1c).
Mounting Motors
The LEGO motor is 4 ...
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