First of all, here a Spanish from Spain, so sorry for my english.
I’ve been trying to make working my pixhawk for more than six months. At the very beginning, a lack of power happend to one of the engines after being working in 70% of throttle. Never achieved a solution for this.
Furtheremore, after getting one of the engines burned, somethin is wrong in my copter. Motor are not spinning properly.
Bench testing with the props off is done using Mission Planner > Setup > Optional Hardware > Motor Test.
Using the radio to arm the motors also enables the PID controllers and the results are chaos because the PID controllers are trying to stabilize an aircraft that is not flying.
Also you can use the radio arm and power up to test the motors " no props please" as long as the craft is sitting firmly on the bench and the arms do not dip your fine. But yes Motor test is the best in most cases.
I think your over thinking this, using the radio to test things like arming without props or ramping up the motors is not a issue, Fact i located the issue for the OP. i rather test arming and my radio TX on the bench then in the field.
Question: if the motor windings was broken lets say from a long screw the motor will burn regardless right? however if one lead was broken you see it twitch like we see in the video. Dropbox - IMG_6895.MOV - Simplify your life.
I am not over thinking anything. You recommendations have basis in fact, and bench testing by arming with the radio and have props off causing strange behaviors is a known issue. In short, you are spreading false information.
And you said SHORTED, NOT BROKEN. You just keep digging that hole deeper.
That’s ok I made a few holes in my lifetime dug a few foundation’s for homes, pored concrete and tied rebar as well. I stand by my assessment that he has one “Broken” motor lead.
BTW I was talking to a guy that does all his motor tests with the radio. I guess he is wrong as well. lol but for me i use motor test then check arming with the radio as seen in my video no Bonkers bro.
On another note most of the beta flight FC do not have internal damping so naturally some vibration would Trigger a PID command. Possibly testing this on a frame spooling up the motors when armed could help people fix there vibration issues like it helped me in Bataflight last week.
Note once everything is working well using motor test testing the motors without props on moving the sticks for roll and pitch using the controller allows you to check the Pids for any odd reversal under power I even submit that this would make a safer first flight saving potential body harm.
Yeah, for us final test before first flight is either hand-held (overhead) or weighted down (for large craft) and arm in Stabi,ize and check pitch and roll is all working as expected.