Page 285 - LEGO MINDSTORMS - Robotics Invention System-2 Projects
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Robot 9 • The SpinnerBot
Spinner Arms Step 9
Snap the half-beams onto the three-quarter
length pins to hold the arm firmly together.
Set the Spinner Arms sub-assembly aside;
you will need it in Final Step 18.
The Touch Pads
Left Touch Pad
Right Touch Pad
The Touch Pads are the probes with which the SpinnerBot detects a flag. Each Touch Pad is built so
that its center of gravity is below the connector. As a consequence, the pads will hang level with the
ground regardless of how you orient the SpinnerBot. The Touch Pads are just wide enough to sense
the flag if it is in range of the grippers, and to miss it otherwise.
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