Help needed with tricopter. All motors stops!

[Bbjen]

Hi, If anyone could help before I tear down my tricopter.
If you look at the video you will see at 1m19s all the motors on my tricopter stops.
They then restarts as normal for a certain period of time.

My setup:
KK2.1.5
4s 3300 30C
NTM Prop Drive 28-30A 750kv / 140w
9 inch prop
Afro esc 30 Amp

A big thanks to anyone that could help

 

[meehan]

I am having a similar problem on my quadcopter (afro 12 ESC's and KK2.1.5. It would just drop out of the sky, when I would get to it the KK board was still armed and I could just throttle up and go. Mine problem was happening like once ever 3 or 4 flights. I think my problem was water related. I had been landing in tall wet grass and had some other water related issues. I hit KK board, esc and rx with isopropyl and allowed it to dry then followed up with CorrosionX. I have not had any issues in about 30 flights but time will tell ...

Let us know if you figure anything out.

Tim

 

[Bbjen]

Thanks for the reply Tim,

I'll take a look at it but I doubt it is the problem.
It's been doing this since day 1. This video was his second flight.
At first I was running it on a 3s and I tought it was under powered. But it does the same on a 4s.
I might try to reflash my KK Board.


Benoit

 

[makattack]

What firmware are you running on that board? The first time almost sounded like it was a failsafe issue, where the TX/RX lost link, but the second one almost sounded like the ESC's re-booted making it sound like a power or reset issue. I'm afraid I can't offer any real help. Reflashing with the latest firmware might be good anyway, but I'm not sure that's necessarily the issue.

 

[Bbjen]

I'm gonna hit the workbench tonight and let you know what comes out of it.

 

[cranialrectosis]

Where on your throttle does this copter take off? 50%?

Is it possible you are hitting throttle minimum and need to extend your bottom range?

 

[Bbjen]

I Think I foud the problem...
There was two of my esc's sending 5V to the kk2.1.5 board.
It must have been a brown out problem.

I did a test by tying my tri to the table. Up to 4amps drawn without any problem.
Waiting on the good weather to test it outside.

Thank-you guys!

 

[Bbjen]

It seems that the problem was not solved...
Back to square one!

​

 

[jipp]

carnage. one thing about the flight test product.. it seems the arms break before other items. would this be accurate with the dead tri on your table? what happen, did it flip into the ground?

chris.

 

[cranialrectosis]

Dang that looks like the upper and lower frame plates snapped by the left boom! I would have hoped the wooden boom broke first.

When you rebuild, you may want to leave the camera gear off the copter until this flies right. The less weight you have in the air the less breakage you will have in a crash.

Did your copter lift off at 50% throttle or did it lift off at significantly less than 50% throttle?

 

[Bbjen]

It lifted at about 50% without any problem... I built an H copter wit the parts and another moter I'll see if it still has brown outs...

 

[Bbjen]

They did snap...
I now accidently fried my kk2... Now with a white screen. The Atmega chip will not accept a reflash.
I need to label my homemade lc filter and my homemade ubec...

I also found that my problem came from my esc's. They are underpowered at 0.5Amps Afroesc are good but the kk2 board needs an external ubec.

I'll order a kk2.1.5 and a ubec asap.

 

[finnen]

That does sound like a brown out problem. If that happens, the receiver/kk2 would hit the failsafe (no throttle), and by the time it hits the ground, it would probably work again.

 

[meehan]

They did snap...
I now accidently fried my kk2... Now with a white screen. The Atmega chip will not accept a reflash.
I need to label my homemade lc filter and my homemade
I also found that my problem came from my esc's. They are underpowered at 0.5Amps Afroesc are good but the kk2 board needs an external ubec.

I'll order a kk2.1.5 and a ubec asap.

I would be very surprised if the kk board was running more than .5 amps. Are you running servo off same power? I have run kk and rx off single esc many times without issue. Perhaps there is an intermittent short on the board causing excessive current draw that is leading to your problem?

 

[Bbjen]

Maby, but I,ll have to order another kk board. Should I get the mini? did anyone test it?

 

[meehan]

Maby, but I,ll have to order another kk board. Should I get the mini? did anyone test it?

I have been using the KK boards for about a year and been pretty happy with them but recently picked up a naze32. I am really happy with the naze32 with added on bluetooth module. Naze + bluetooth + phone is way better than the KK screen for tuning PID.

 

[kah00na]

I've used the KK2 and the Mini KK2 board. Both have worked well for me. I connect the +/- from all my Afro ESCs to the board. The KK2 board supports it as long as the ESCs are "linear" (which Afro ESCs are). I haven't tried this myself, but one other thing you could try is to connect the UBEC directly to both your receiver and your KK2 board. This way you know that neither one of them would ever lose power regardless of the each other or the ESCs. Like I said, I haven't tried that myself, but I always connect all the ESCs' power to my KK2 board and haven't had that problem yet.

 

[Bbjen]

But powers on the kk2.1.5 only comes in through M1 so all the other esc's are ignored.

 

[C0d3M0nk3y]

But powers on the kk2.1.5 only comes in through M1 so all the other esc's are ignored.

M2 - M8 share power. This is why you need power on something other than M1 to power a servo connected to M4 for a tricopter.