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243_masterpieces_03.qxd 4/18/03 7:02 PM Page 124

124 Masterpiece 3 • The LEGO Turning Machine

Direction Control Step 4

Direction Control Step 5
The double-beveled 20T gear is
placed so that it touches the
tape for only a half stud. This is
so that the gear does not
interfere with the liftarms of the
Tape sub-assembly as it passes
underneath the gear.

Direction Control Step 6

Direction Control Step 7
The two 20T
gears act only
as a guide for
the tape
and will
not be
connected to
the motor.