After my previous crash of my tricopter while testing the flight times, I was trying to figure out was wrong. Me along with some other people on forums thought that my servo could be pulling to many amps, causing a brown out. Now the reasoning behind that is because, well, tail servos for tricopters aren't small and the afro esc's only put out .5 amps...So I bought a 5v 5amp external bec and have it all wired up like I said in the video and went to test it out.
I flew it very fast like when it crashed the first time, pulled it back because it was getting futher away, it pulled back for a second (with my input), then rotated itself a bit, stopped pulling back, and flipped towards the right motor while speeding up the other motors(all against my input). You can see this better in the video.
Now I'm almost sure its not my radio since my planes all fly fine, I dont think it is the firmware since so many people use 1.6 on tricopters and dont have problems. So it could be my board, my receiver or how I have my bec hooked up.
I wouldn't even bother rating this, this article is not really helping anyone besides me.
Any input from you guys would be awesome!
Unlike other boards, the KK2 board benefits from the stability of two regulated power supplies, one to prevent receiver brown-outs and a second to power the servos.
Do not connect the 5V supply from M1, or the receiver to the servos on M2-M8, else the electrical noise from the servos in flight will cause the KK2 board to reboot and crash your aircraft.
Hope this helps, (copied from http://code.google.com/p/nextcopterplus/wiki/OpenAero2_Getting_Started)
Cheers,
Nick.
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As such you need to use a standalone UBEC to provide power to the flight controller. You can power the KK2.0 by using a UBEC that connects to your Rx battery input, the power will then go through the Rx to the KK via the channel connection leads between the two.
Another method is to use a Y harness to combine the motor 1 esc and UBEC into the M1 connection on the KK.
I'm certainly no expert such trying to help, I understand myself.
Nick.
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I have a quad doing the same thing.. Its was a ESC that would overheat and did the exact same thing. I also blamed the KK2 board. and bought a ArduPilot. and it did the same thing. I swapped the ESC and its all working like it should..
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If that doesn't work try the other ESC's.
I would keep the board for last, safes waiting time and money.
Good luck!
P.S. this is more a forum post than a page post in my opinion.
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I wouldn't wonder if the problem would turn out to be a broken connection of some kind, especially since you seem to pull around those poor cables and handle that fagile electronic parts in quit a rough way!
Actually, I could almost not watch the video till the end, feeling so sorry for those cable strands and solder joints...
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B) You sound really silly "Actually, I could almost not watch the video till the end, feeling so sorry for those cable strands and solder joints..." Lol that is laughable, that means you can't watch any rc video out there. Also I'd really like to know how I am, from what you are making it out, murdering all my electronics by just flying my copter.
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Just me typing and thinking too fast, soz!
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The APM controller has excellent built-in logging, and I could rule out brown-outs, radio problems, vibrations etc by downloading the logs.. So the problem had to be with ESC and/or Motors.
I ran the motors (with props) full throttle on my bench, and sure enough; when one of the motors heated up because of the load it practically seized up! It needed just a few seconds to cool down and loosen up again, that's why I, at the crash scene, never could see the problem (need to run faster to the wreck I guess).
Put your motor on an arm clamped down in a vice and give it full throttle with a big propeller for a minute or two and check the bearings.
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