When I move up the throttle on my drone, the propellers keep spinning faster and faster despite me no longer moving the throttle stick up. Any ideas?

[Convair]

Hi all,

This is my first drone build.

I'm using BLheli32 escs with pwm motor protocol via ppm radio signal.

As in the title, I'm experiencing throttle runaway where the motors don't stay at a specific rotation speed when the throttle is at a fixed position. The motors (all four) just tend to increase speed despite this. The only way to prevent it is to pull throttle all the way down. Once they get too fast, even that is not enough and the motors are only stopped by disarming the drone via a switch on the transmitter.

Does anyone know what settings I need to look at in BLheli configurator to fix this or how to calibrate the escs?

I've tried calibrating them using the blheli software but either I'm doing it wrong or it's not working.

Thanks

 

[yangdalean]

Have you checked the hall module of the remote throttle?

 

[Convair]

Yes, on the left stick, yaw and roll work fine and the drone motors hold their speed when I move the throttle sticks to the side. On the right stick, the roll also works fine and the relevant motors hold their speed too. However, when I move the right stick vertically to engage the throttle, all of the motors begin revving up without input. I have to quickly return throttle to zero otherwise, if they get too fast, I loose throttle authority completely. If the hall module was faulty, would the horizontal roll control on the right throttle still wok as it does on my remote controller?

I heard that this happens even when everything is fine when the propellers are off because the drone sensors get confused. So I tested with propellers. I got the same result. The drone began ascending quickly, I lost throttle authority and had to disarm it in mid air to avoid it going to drone heaven.

In addition to this, when I try to move the drone on the ground while it is connected to the remote controller (transmitter), the motors spin up to counteract it so I think that the accelerometer and gyroscope motor responses are fine. In addition, I disabled the onboard barometer in case that was faulty. However the problem persists.

So, could my hall module still be faulty given the above? And are there any other ways to troubleshoot? My BLheli config is below. Thanks for the help.

 

[mozquito1]

Hi all,

This is my first drone build.

I'm using BLheli32 escs with pwm motor protocol via ppm radio signal.

As in the title, I'm experiencing throttle runaway where the motors don't stay at a specific rotation speed when the throttle is at a fixed position. The motors (all four) just tend to increase speed despite this. The only way to prevent it is to pull throttle all the way down. Once they get too fast, even that is not enough and the motors are only stopped by disarming the drone via a switch on the transmitter.

Does anyone know what settings I need to look at in BLheli configurator to fix this or how to calibrate the escs?

I've tried calibrating them using the blheli software but either I'm doing it wrong or it's not working.

Thanks

If props are off this is normal. Put some props on & go for it, just be ready to disarm.
I'm running old multishot so have to calibrate every time I go out. You don't need to with D shot.
Calibrate in BF by check box in motor tab
(props off) move master to max,plug lipo in, wait for beeps to stop then move master back to minimum.
Unplug lipo. You should be ready to go next flight.