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Walter’s Turtle 107

1
3 / 2 in

1
1
4 / in 4 / in
2
2
1
14 / in
2
1 in 1 in

1
Figure 8.28 Side dimensional view of upper bracket fabricated from � ­in �
1 1 8
� ­in � 14 � ­in aluminum bar.
2
2
1
1
1 / in 1 / in
8
8

1 / -in hole
8
Figure 8.29 Side dimensional view for hole placement in top of the upper bracket.

6-32 Soldered
6-32 6-32 brass nut wire
machine nut 6-32
screw nut

1-in-long 1-in-long
compression 6-32 compression
6-32 spring 1 / machine spring
2
nut screw

Figure 8.30 Side view of upper bracket detailing the mounting of the upper
bracket to the robot base using machine screws and compression springs.
Also details bracket half of the bumper switch.

Mounting the Steering Servomotor
If you haven’t done so, mount the steering servomotor to the robot base, using
four 6­32 plastic machine screws and nuts. Before you attach the U bracket to
the steering servomotor, make sure the steering servomotor spindle is in its
center position. This will ensure that the robot will steer forward right and left