The quadcopter is assembled in QUADX mode and the ESCs must be connected to the board in the following manner:
If the ESC uses a BEC of the LDO type, as in our case, it is possible to connect all the outputs without carrying out modifications. If the BEC is of the switching kind, it is important that only one of the ESCs brings power to the board. In this case, please remove the red wire from each ESC’s cable, with the exception of the one that will power the board.
Now you will have all of the mechanics and electronics assembled; there are only the propellers left to be mounted, however at the moment it would be better not to apply them to the motors, since their presence may create a dangerous situation. Please connect the battery monitor’s jumper to the AOV input, and then proceed to start the system for the first time, and connect the battery to the connector that brings to the distribution board; you will hear some beeps coming from the ESCs and two power LEDs of the board will turn on, in addition to the power supply LED of the IMU module.
At this stage you will have to deal with the calibration, an operation that is very important since it sets all the ESCs so that they will operate in the same way.
The calibration may be carried out – in a very simple way – by means of the MultiWii software.
The operations to be carried out are:
Please notice that, if needed, the maximum and minimum calibration values may be modified by intervening on the ESC_CALIB_LOW and ESC_CALIB_HIGH lines.