When using the Lynxmotion Quadrino Nano as a UAV flight controller (or another MultiWii based controller), the ESC's (electronic speed controllers) used to drive the brushless motors need to be calibrated. This is to normalize the RPM output for a given input signal on all motors. ESC's are not all equally made and reference points therefore need to be setup. You can calibrate the Maximum and Minimum value directly by connecting a ESC to an R/C receiver but, this will not send the same signal as the flight controller and you might loose precious RPMs at the very top. By using this method, you would also need to calibrate each ESC one by one; on a Quadcopter it's not too bad but for a Hexacopter it could take quite some time. With the Quadrino Nano, there is a better way since the software that runs in this flight controller allows for a calibration procedure, but it does require a full flash of a Not-Flyable version of firmware which needs to be overwritten by a real version afterward. It is also very important to pay attention to each calibration step in order to avoid any injuries since the calibration of an ESC requires to throttle all the way to the maximum speed and is some cases (if not properly done) can have your motor spin when you do not intend it to.
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/blog/show/lynxmotion-quadrino-nano-advanced-esc-calibration