I'm flying a Martian 215, Matek f405, blheli 20es, MT2204-2300kv, 4S.
After doing a fast roll, left or right, before I raise throttle, the copter goes into a death roll. Yesterday it happened twice, each time on a different rear motor. After rolling right the rear right motor stops, after rolling left the rear left motor stops.
Attached are the blackbox log files for both events and an image of the blackbox graph of one of the events.
In both instances the FC commands the motor to 100% to stop the roll maneuver. The rear motor stops producing thrust and the spiral ensues.
Could this be a too high P value ? Could this be desync or demag ?
I've discovered a way to reproduce the spiral of death. At the end of a full stick roll, if I release the stick and let it come back to center via the gimbal spring, the spiral of death will occur. Doing a roll to the right will cause the right rear motor to stop responding, and a left roll the rear left motor.
I've already increased my min throttle command. In all cases the minimum motor command of the motor that stopped was at or above 144 just before the spiral. In the last case it was at 311 . (these are raw values from blackbox)
I'm leaning towards the cause being the 5050 props on the cheap 2204-2300 motors and the motors not being able to keep up with the rapid changes commands with these aggressive pitched props and causing demag events.
View attachment Archive.zip
After doing a fast roll, left or right, before I raise throttle, the copter goes into a death roll. Yesterday it happened twice, each time on a different rear motor. After rolling right the rear right motor stops, after rolling left the rear left motor stops.
Attached are the blackbox log files for both events and an image of the blackbox graph of one of the events.
In both instances the FC commands the motor to 100% to stop the roll maneuver. The rear motor stops producing thrust and the spiral ensues.
Could this be a too high P value ? Could this be desync or demag ?
I've discovered a way to reproduce the spiral of death. At the end of a full stick roll, if I release the stick and let it come back to center via the gimbal spring, the spiral of death will occur. Doing a roll to the right will cause the right rear motor to stop responding, and a left roll the rear left motor.
I've already increased my min throttle command. In all cases the minimum motor command of the motor that stopped was at or above 144 just before the spiral. In the last case it was at 311 . (these are raw values from blackbox)
I'm leaning towards the cause being the 5050 props on the cheap 2204-2300 motors and the motors not being able to keep up with the rapid changes commands with these aggressive pitched props and causing demag events.
View attachment Archive.zip