Page 314 - Lego Mindstorms
P. 314
Robot 10 • RIS Turtle
Penholder Step 12
A ratchet is necessary to allow the
penholder to run in only one direction.
When the motor reverses to shift gears,
the ratchet locks the penholder, and it
doesn’t move. Here the ratchet on the
gear is complete.
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