Sonar Supports
The supports for the ultra sound capsules is used also to hold up the magnetometer and the GPS modules, so they are high enough to keep that sensors far from electric and magnetic fields.
To correctly bend the strips it is crucial to have a good reference on it. A milling machine is used to mark the aluminum in order to have the right position at 90°. This mark is useful to catch the bending tool too, to avoid misalignments while pushing the blade.
Eventually... the supports are ready with all the sensors installed: 2 + 2 ultrasound transducer, GPS and 3 axis magnetometer for obstacle avoidance and navigation.
Note the brass screws used to avid magnetic interferences with magnetometer.
The sensors support can be raised up for normal operation or
lowered down for carriage.