What is motor timing?

Motor timing is very important to motor efficiency, reliably, torque and RPM for multirotors. There are coils and magnets in a brushless motor. In order to make the motor spin, we run electrical current through the coil which will create magnetic force and attract the magnet. Every time we charge and discharge the coil, induction happens. It means when we give the coil current, it will take time to build up the magnetic field and reach ideal level, when we stop providing current, it will also take time for the magnetic field to diminish and eventually disappear completely. The goal of motor timing is to start switching the motor coil early, so we have the magnetic field ready at the right time. More on oscarliang.com