Hello. Sorry I haven't been on DroneTrest for a while.
Anyway, I've been testing my parts, and so far the quad is looking good. But during my part tests (I have one test for each component to see if it works) I noticed my motor was just twitching. I searched online and found that he had the same ESC (HW30A XXD). We had the same setup, using Arduino as FC. In his code, he did some stuff with PWM to arm his motor.
Now I'm wondering if that is necessary, because when I tested my motors months ago, it spun for a second then twitched then spun again. In this recent one, though, I think the motor doesn't want to spin because of some foam I put for vibration damping. The very center bottom is blocked I believe. The code for my test was the same as the old test. I didn't "arm" from what I can recall