Monster X and TP4250, motor smokes during KV Test

[Lizard]

Still not sure about that. Have done the Torque Control tests many times with my motors though.

I have once read somewhere that the bearings don't like to be spun without load, they could vibrate or something.

The other thing is that the balls in bearings slip when accelerated too quickly which wears them down faster. The manual of my Novarossi 528XRP nitro motor stated that one shouldn't go from zero throttle to full throttle instantly because the motor spins up faster than the inertia of the balls in the bearing allows for. I.e. the balls don't 'roll' inside the bearing bur 'slide'. Not sure if that effect also applies to brushless motors (bearings being smaller, but motor can spin up even faster than a nitro), I just avoid to spin it up too quickly.