IMU Installation

[fgorina]

I have doubts about the physical position of the IMU. I am worried about the magnetometer. If I install the IMU vertical, I understand that when I say in Calibration that the boat is “flat” PyPilot will take anything into account and convert magnetic and intertial values according. The question is if really all 3 axis are interchangeable or there are some preferred axis.

Second question is if I it is correct to put the motor controller and the TinyPilot / IMU in the same box cm away one from the other or I must let some more space so the currents in the controller don’t affect the magentomer.

Actual installation (A Simrad autopilot broken ) has the “Junction box” near the hydraulic pump and the magnetometer about 1 mt away.

Thanks

[seandepagnier]

Technically certain axes are slightly more sensitive with most inertial sensors. This is not really a big issue though. You do need to "level" the boat once the sensors are mounted.

If the motor controller is right next to the compass sensors, it can influence them which is a bad thing. Current carrying wires generated magnetic fields. You can potentially run the pypilot_scope and check the compass readings while manually controlling the motor to see how much deviation there is.

[fgorina]

Technically certain axes are slightly more sensitive with most inertial sensors.    This is not really a big issue though.  You do need to "level" the boat once the sensors are mounted.

If the motor controller is right next to the compass sensors, it can influence them which is a bad thing.    Current carrying wires generated magnetic fields.    You can potentially run the pypilot_scope and check the compass readings while manually controlling the motor to see how much deviation there is.

Thanks will check