- Mount the sensors in the small box with one 4-40 screw and nut per
sensor. - Feed the wires for the sensors and the motors through the holes you
drilled to each side of the castor. - Glue the small box to the cart, as shown in Figures 13-32 and 13-33.
The face of the sensors should be a quarter-inch above the floor.Figure 13-32:
Keeping the
sensors just
off the floor
allows Sam
to spot
the tape.
Chapter 13: Sensitive Sam Walks the Line 335