Hello guys!
I think that my 4 in 1 Esc is damaged...
Quad is a 4" with 50A speedybee 4 in 1 Esc bl helli s,matek f7,emax ecoii 2004 3000kv motors.Running 4s and 6s.
Yesterday a made a flight with a 6s and everything went fine,quad flew perfect.Today I charged one pack to fly but this happened: I armed and the motors didn't spin up and an alarm shown on Googles: Dshot telemetry...
After that conected to Betaflight and I found out at motors tab that Esc 2/motor was not working...
Unplugged the Battery plugged again and all the motors are Beeping and mooving as normal on startup beeps.
Conected to Bl helli configurator and again esc 2 failed to read...
Things I have tried so far...
-Checked the pins/ wiring between fc and Esc: everything seems fine
- Remaped motor 2 on the Fc to spare pad
-Directly soldered the esc 2 wire from Fc to Esc
-Flashed again the firmware to Fc
NO luck!
When I plug the Battery the motor 2 beeps and slightly mooves like the rest of the motors ,but the Esc configurator cannot read Esc 2 and only the other 3 escs are recognized.
Any thoughts?
Thanks for any help/idea

I probably wouldn't have soldered wires directly or anything. The fact that only one ESC can't be read and won't spin up manually in BLHeli, pretty much guarantees what you thought.

If you can't read an ESC nor flash an ESC, it's probably toast, especially is you didn't have a crash that might have screwed up the wiring (you ruled this out already). You can repair them if you have the skills and kit to do it. Doing so is beyond my level by a fair bit.



The other hack, buy a single/individual ESC, use it instead of the broken ESC.

(11-Mar-2024, 12:47 AM)Pathfinder075 Wrote: I probably wouldn't have soldered wires directly or anything. The fact that only one ESC can't be read and won't spin up manually in BLHeli, pretty much guarantees what you thought.

If you can't read an ESC nor flash an ESC, it's probably toast, especially is you didn't have a crash that might have screwed up the wiring (you ruled this out already). You can repair them if you have the skills and kit to do it. Doing so is beyond my level by a fair bit.



The other hack, buy a single/individual ESC, use it instead of the broken ESC.

Thanks for your answer,well said...
Had around 50 flights with this speedybee esc.
The strange thing is that the "broken" esc 2 which cannot read,plays the tones with the motor on the startup and also the motor makes those small moves when plugging the battery...

I've had similar to that. The twitching motors, in my case, was caused by having bridged two pads on a motor connector I was soldering on an AIO. But on a 4 in 1 with separated pads, nothing should be bridged, also it wouldn't have flown the day before. Maybe re check the motor wiring and also the wiring at the motor too. See if something has bridged. Also remove the motor wires from the ESC and see if it will work in BLHeli minus that motor.

(11-Mar-2024, 12:16 PM)Pathfinder075 Wrote: I've had similar to that. The twitching motors, in my case, was caused by having bridged two pads on a motor connector I was soldering on an AIO. But on a 4 in 1 with separated pads, nothing should be bridged, also it wouldn't have flown the day before. Maybe re check the motor wiring and also the wiring at the motor too. See if something has bridged. Also remove the motor wires from the ESC and see if it will work in BLHeli minus that motor.

Perfect idea!
Will do and report back...

No luck!
Esc 2 is not recognized even with the motor wires un soldered...

I finally managed to get the esc to work again and it wasn't an esc failure.I had a bad motor output.The motor 2 pad of the fc was not sending signal to the Esc...
I have remaped the motor 2 signal to motor 7 pad of the matek f7,
And the esc 2 now is recognized at betaflight and working.
Was mainly using 4s without problems and lately tried some 6s flights.
Im afraid that the 6s battery and the sparks during plugging the battery causing problems to the fc?
One more thing is that the capacitor was not making good contact on the pads of the esc and the spark sound during plug in was even bigger.

You could try doubling the capacitors. Put one on the pads and one on the connector. You shouldn't be getting sparks or burning when plugging in.

Anyway, looks like you got it fixed.

(11-Mar-2024, 08:39 PM)Pathfinder075 Wrote: You could try doubling the capacitors. Put one on the pads and one on the connector. You shouldn't be getting sparks or burning when plugging in.

Anyway, looks like you got it fixed.

I have tried this with 2 capacitors in parallel but that spark sound was still there.There are some antispark connectors but only xt 90

As long as the power is buffered before it hits the 4-in-1, you should be fine. I think sparking on 6S is just a downside of 6S. Have you tried 5S on the same quad? I notice you've had tuning issues on the other thread, maybe 5S would be a better compromise between the two. No idea, but it's a thought.

(12-Mar-2024, 06:49 AM)Pathfinder075 Wrote: As long as the power is buffered before it hits the 4-in-1, you should be fine. I think sparking on 6S is just a downside of 6S. Have you tried 5S on the same quad? I notice you've had tuning issues on the other thread, maybe 5S would be a better compromise between the two. No idea, but it's a thought.

Yes I had tuning issues but after a lot of tuning and slightly more filtering the quad has enormous power on 6s since its a lightweight 4" and after landing the motors are cold,fingers crossed more test to come and further tuning...after all this is a part of the fpv hobby always improving and learning new things...
I'm a little bit sceptical with the health of the Fc of this particular setup since the bad motor output even if the problem solved with remaping to a different pad.
However many people have used the same solution...

https://oscarliang.com/fix-faulty-motor-output/

https://youtu.be/FysPHx7RL9s?feature=shared

You can replace the FC down the line, but for now I would just use it until it does break.