Naza throttle stuck high!

[Arcolog2]

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Hello All,

F550 with naza, stock 10" props,
ar8000 with satellite, 3s 2200mAh(until new batteries arrive.

I was
setting up gains and had her flying relatively well. I decided to see how much
power she had and mashed the throttle for a second. I lowered the throttle to
bring it back down and it continued to climb into the sky. My butthole puckered
as I thought 700 bucks was about to fly away. So I had absolutely no throttle control, once I tried to yaw
the copter I regained control of the throttle and I was able to descend the
craft back to the ground and quickly unplugged it.

Any thoughts or ideas
would be great!

Dave

 

[nicwilke]

Thoughts: Reckless
Ideas: Sell up before you wreck it for all of us.

 

[DucktileMedia]

Dude, are you looking to get bashed on here??? WTF is wrong with you? Thanks!

 

[hjls3]

arcolog - just in case you are wondering what got nic and yuri fired up (rightly so BTW) - it is just plain stupid to fly a MR any where near an airport, much less a busy one. Dont do that anymore.- thanks from a guy who flies a small aircraft with his kids on board.

 

[Hartz]

Hi Dave,

The safety issue is a big one. It is only a matter or time before certain parts (god forbid everything) of this hobby will be banned or heavily restricted. It is only going to take one serious accident where someone gets hurt or worse and it could be ruined for everyone.

As for your problem I would suggest double checking all of your wiring and particularly focus on throttle leads. Make sure you practice in a nice big open area free of people and always range test your equipment. Your transmitter should have a range test function built in and there will be instructions in the manual on how to perform the test properly. Worst case scenario you may have a (intermittently) faulty transmitter, receiver or flight controller.

 

[Arcolog2]

OK so I edited the post, that didn't happen. So I'm leaning toward interference as being the problem, but it was only the throttle channel, which is weird. I've never had an issue with any of my craft sticking in one channel (unless is was a servo) The ar8000 and satellite were brand new out of package.

 

[Arcolog2]

As for your problem I would suggest double checking all of your wiring and particularly focus on throttle leads.
Your transmitter should have a range test function built in and there will be instructions in the manual on how to perform the test properly. Worst case scenario you may have a (intermittently) faulty transmitter, receiver or flight controller.

Thanks for reply. The craft was 5 feet from me when it took off on its own. I will try another receiver and satellite from my 500, hmm maybe my plane one, forget which bird has the fail safe receiver in it. I will also try throttle in manual mode, that might help narrow down if its attitude mode causing the problem in the naza. Not sure what else I can try, other than another naza.

 

[hjls3]

arcolog i have had some behavior like that out of naza/gps. it was due to a crappy calibration. when calibrating tis super important to basiccaly have your MR away from everything. no watches on your wrist, rings, not too close to cars etc.

 

[Arcolog2]

I don't have the GPS installed currently. Wanted to fly attitude mode first so if any problems I don't smash the GPS on the ground.

 

[helloman1976]

The first thing that comes to mind is THROTTLE HOLD FAILSAFE. What radio are you using? What's your throttle hold failsafe set to, 100%? Sounds like you lost radio signal to craft and the craft hit 100% on throttle hold then upon the craft re-establishing connection you were able to land. Check your transmitter calibration and check your throttle hold failsafe settings.

 

[mbsteed]

Another option is to take the props off and bench test the throttle and see if you can reproduce the problem on the ground.

 

[helloman1976]

Another option is to take the props off and bench test the throttle and see if you can reproduce the problem on the ground.

You should never spin your electric motors without resistance i.e. a prop on them, that being said be careful and it'll probably be fine just don't run them at full power with no load.

 

[Stacky]

Why not?
First time I have ever heard that one in 2 years of multirotors.
I have lost track of how many multis I have now built, close to 20 of all configurations and I have never had any problem or fault occur when testing without props on. I always take my props off when bench or indoor testing.

You should never spin your electric motors without resistance i.e. a prop on them, that being said be careful and it'll probably be fine just don't run them at full power with no load.

 

[helloman1976]

Why not?
First time I have ever heard that one in 2 years of multirotors.
I have lost track of how many multis I have now built, close to 20 of all configurations and I have never had any problem or fault occur when testing without props on. I always take my props off when bench or indoor testing.

With in-runners you can explode the internals by over-speeding them when there's no resistance. With outrunners you also need to avoid going over the ratings, amperage and rpm. If you do go over these you'll destroy the internals or burn up the windings. If you are careful, you'll be fine...now if you motor isn't balanced and you run it at max rpm without a prop...make sure you are behind a shield.

 

[Bartman]

we don't normally mention range testing of new radios but maybe it's a good idea here to anchor your helicopter with some weights, put the props on, run up the motors to about half and then walk away while checking that you still have control. go at least a hundred or two hundred feet away and make sure you don't have a weak transmitter or receiver. a friend standing by the helicopter can tell you if your radio commands (rev the motors up and down) are having any effect.

good luck (and don't do the things you haven't done)

 

[olof]

You don't have to start the props, to range test, just switch the modes and observe if the LED changes the way it should, step back at least 100' (30M) using the range test option in your TX.

That is how I do the range test with my DJI's and my Futabas.