Hi all, I cannot figure this one out and I truly appreciate your help!
My setup
Frame: ZMR 250
Motor Emax RS2306 2400kv
ESC: T-Motor F45 V2.0 4 in 1
Prop: Gemfan hurricane 5.1 x 4.99 x 3
Battery: 4S 1550mah 100C lipo
FC: modalai flightcore
FW: V.1.11.3 generic 250 quad
Problem:
The above setup works perfectly when i fly it with a 3s lipo, but when i shifted to a 4s the quad would oscillate really fast. It can maintain altitude but the oscillations are really quick in the roll axis. The motors get really hot within few seconds of flight, hot enough to burn your hands!!
I am not able to figure out why this is happening! I havent changed any parameters on the FC, using the stock parameter and havent done any tuning! The escs are also using the FW that came from the factory. I tried using the PWM protocol and Dshot 1200 as that is supported with my esc while flying on 4s and the results are still the same!
I will upload the Ulog tomorrow and if possible the flight video as well.
You need to reduce the rate controller gain even more if you want to fly with a 4s battery. That’s normal, it’s be cause the gain on the motors is then higher due to the higher voltage, so to keep the same tuning, you need to compensate in the controller for that gain increase.
In the 3S flight log, it seems fine and the hover thrust is already quite low, so I think you should really fly with a 3S battery
