Back Motor randomly cutting out

[Donal]

Hi Everyone,

I’ve been flying my tricopter for about 6 months now and I love it. But recently it developed a problem, I’d throttle up and only the front motors would start but after throttling up and down a few times the back motor would start and i could fly just fine for a few minutes before the back motor cut out.

I have replaced the ESC and motor and stripped the whole tricopter down and redid the wiring but am still having the same problem, could it be an issue with the Naze32?

I went to buy a new top plate but you can only buy them as a bundle and I only want the top plate.

Any ideas?

Thanks

Donal

[Terje]

Maybe check the soldering on the back motor signal pin on the Naze32? Any micro cracks in the copper trace on the board?

[phlakvest]

Try taking off the props, then swap the signal wires with the back motor, and one of the front ones.

See if the problem follows the motor/esc or channel on the naze.

[LeoTheHuman]

Here you go: http://rcexplorer.se/product/single-spare-frame/

[Donal]

Ok I’m at a total loss now,

The motor was stuttering

So I ordered a new esc-same problem

So I ordered a new motor-same problem

So I ordered a new Naze32 top plate-same problem

So I swapped the signal wires to a different arm AND THE STUTTERING stayed on the back motor.

In the process of all this Ive torn my tricopter down and re-done all the wiring twice and then tonight I broke the Bec on the power distribution plate so I’ll have to order a new one of them too.

I’m at a total loss, it’s basically a new tricopter but with the same left and right arms and the back motor still randomly stutters.

Any more ideas? 🙁

[Terje]

Are you running PWM, CPPM or S.BUS and what transmitter/receiver are you using?

[lauka]

Have you connected the signal ground from the ESC to the FC? So one ground to the battery pads, and one to the pin header on FC.

[Donal]

I’m using a Frsky DJT module with the X8R receiver and I’m using PWM.

@Lauka I’ll try that as soon as my new power board arrives, what would this tell me?

Thanks for the help

[lauka]

Many people have had issues when the ESC signal ground (the ground pad next to the signal) is not connected. Don’t ask me why, but the signal is cleaner this way.

[Author]

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