Ok, so through alot of headache, I have M2 that twitches. Motor changed, ESC changed, upgraded board and the dawg gone ******* still twitches! Hooked up to software and no dice! Same problem. Ideas????
Ok so for **** and giggles I reinstalled the ESC new one and fired it up. Problem is gone.
But in regard to your question:
The studder/twitching was both. It would twitch on startup and while activating all the motors. When I would hook it up to the DJI software and conduct the motor test, M2 would only twitch/studder still.
I believe that when I tried to initially put the new ESC in, I didn't have a good solid soldered connection on the red wire which in turn again gave me a studder/twitch.