Naza went weird

[OneStopRC]

I had something weird happen to me yesterday, I plugged in a fully charged battery and got read to fly. As I punched the throttle, it flipped on me. I thought WTF? inspected and nothing found nothing broken, so I tried again.... Same thing happened and to the same side.

So I picked it back up, checked for damages and checked all the connections as it would appear one motor was not spinning up as fast as the others. Sat it back down, increased the RPM's to confirm one motor was at idle speed!!

I could not think of anything else that could be up with it, so I unplugged the battery, waited 10 seconds and plugged it back in again, this time she went straight into the air with no problems. So I guess my Naza freaked out a little?

Anyone else seen anything like this before?

 

[CrashMaster]

I would check all your connectors, especially the ESC and Motor at idle. Don't just push them together disconnect and reconnect. Next I would re-solder the ESC to the bottom PCB to make sure there isn't an intermittent dry solder. I don't know the temperature in WV but looking at http://www.wunderground.com/US/WV/ it is about the same as the UK (close to nero) so anything electrical can show up weaknesses where solders are not 100%.
Glad there was no damage it is a pain to have to trudge home having no flying time behind you and the prospect of a big bill and 3 week wait for parts...

 

[kloner]

usually the dry solder is the motor wire to the connector and the infamous dji rosin coated bullets. they get soaked in rosin in there jigs and can make the connector not conduct electricity reliably

 

[OneStopRC]

I checked all of my connections, joints and so forth. I checked the connection at the offending motor and ESC with nothing to note. Bearing in mind, I did not remove any connections apart from the battery connector, which allowed a reset to the Naza I guess.

I am not going to call myself an expert at soldering, but I was trained by GEC Avionics in Rochester, Kent, England when I lived there many years ago. That is not to say today, my soldering skills are of that back then. I see no dry joints, no corrosion on joints and connections and the motor bullet connections are clean, and tight. I was thinking of directly soldering the Motors to the ESCs, but I am thinking of moving over to Tiger Motors at some point.

After the reset, I did not see anymore issues with the motor not spinning correctly.... very strange indeed.

 

[CrashMaster]

I am not going to call myself an expert at soldering, but I was trained by GEC Avionics in Rochester, Kent, England when I lived there many years ago.
After the reset, I did not see anymore issues with the motor not spinning correctly.... very strange indeed.

If you trained at GEC then you may need some lessons in soldering :black_eyed: Ouch that hurt....

Nice to see a Kent boy enjoying the big US of A . Knowing when GEC went I won't ask you for your age... Being north of the river we have to take our passports when go over the Dartford Crossing....

View attachment 9866​

I think we can just put it down to a glitch.... These systems are getting too complicated for my old mind and re-booting is always the first option.

 

[OneStopRC]

If you trained at GEC then you may need some lessons in soldering :black_eyed: Ouch that hurt....

Nice to see a Kent boy enjoying the big US of A . Knowing when GEC went I won't ask you for your age... Being north of the river we have to take our passports when go over the Dartford Crossing....

View attachment 12681​

I think we can just put it down to a glitch.... These systems are getting too complicated for my old mind and re-booting is always the first option.

Are you serious about taking your passports? you got to be pulling my leg..... lol.. Yeah, I worked for them, probably 22 years ago now.. lol, now I am showing my age.

That is what I was wondering, pretty sure it was just a glitch... just hope it does not happen mid flight.. lol

Many years ago, I used to go to Southend to shop in Maplins, to buy my electronics items. A few years later, they put in one in Chatham.

 

[CrashMaster]

Maplins is still there.... I can remember a lot longer ago than 22 years ago..... Let's not go there. My children think I am a big kid because of my 'Models' as they call them. However, I have one of them interested and she could become an AP professional now she knows how to build an F550.

http://www.maplin.co.uk/store-locator/southend

 

[OneStopRC]

LOL, I know what you mean... I do not try to justify my toys.... they are fun and a hobby.

 

[quad flyer]

I had this happen once, I think it was because I moved my quad to the "take-off" pad before the boot-up sequence had completed, possibly causing the gyros & accelerometers to be out of zero. This is only a theory as it only happened once which could have been a glitch but I'm now really careful not to move it until the full sequence is complete.
I hope this is helpful.

 

[OneStopRC]

I had this happen once, I think it was because I moved my quad to the "take-off" pad before the boot-up sequence had completed, possibly causing the gyros & accelerometers to be out of zero. This is only a theory as it only happened once which could have been a glitch but I'm now really careful not to move it until the full sequence is complete.
I hope this is helpful.

Now that is a possibility, I plugged my battery in and moved it during it's system checks..... Hmmm.

 

[fredor]

I had something weird happen to me yesterday, I plugged in a fully charged battery and got read to fly. As I punched the throttle, it flipped on me. I thought WTF? inspected and nothing found nothing broken, so I tried again.... Same thing happened and to the same side.

So I picked it back up, checked for damages and checked all the connections as it would appear one motor was not spinning up as fast as the others. Sat it back down, increased the RPM's to confirm one motor was at idle speed!!

I could not think of anything else that could be up with it, so I unplugged the battery, waited 10 seconds and plugged it back in again, this time she went straight into the air with no problems. So I guess my Naza freaked out a little?

Anyone else seen anything like this before?

I have had exactly the same thing happen to me twice and I have flown hundreds of batteries with it if I just unplug and plug it in again works perfect cannot understand what is happening

 

[Emowillcox]

Mine does it all the time too! I see one motor spinning slower before take off then I let motors stop spinning and then re-arm the naza and it works. It's always the same motor.

 

[Roger Ramjet]

Funny you mentionned, just happened to me yesterday. First prop broken in a good 7 - 8 months. As it turned out, I should have known that something was wrong. I could hear one prop spinning much faster than the others but thought that it would settle down as I advance the throttle. Nope, never got off the ground, just flipped over in the snow. Only 1 prop broken. As it is freezing cold around here AND I am addicted Ha! Ha! I plugged the lipo in the house and walk the quad in the driveway.... The NAZA needs few seconds to reset all parameters and establish its level attitude. Hard to do when you are walking around with your MR... Got a good laugh out of it. I thought I knew that....

 

[OneStopRC]

That sounds about right, exactly what happened to me, less the broken prop. But it messed two props up, would seem like a possible bug. Out of interest, did you plug your battery in and move it while it was doing diagnostics?

 

[Roger Ramjet]

That sounds about right, exactly what happened to me, less the broken prop. But it messed two props up, would seem like a possible bug. Out of interest, did you plug your battery in and move it while it was doing diagnostics?

No, it wasn't playing music anymore, it had just stopped which led me to believe that the initialization was completed....Wrong it seems, it still needs a few seconds to conplete te set up process. From now on, I will power the beast exactly where it will take off. Taking no more chances. That has worked for a few hundred flights, why change?

Cheers mate,


Rodge

 

[quad flyer]

I think the musical tones are from the ESC's, I always watch the LED on the naza VU, it flashes a of sequence of red, amber & green a few times then several (4 i think) flashes of green, then it will show what flight mode its in, nothing for manual, amber for atti, green for GPS which is the end of the naza "boot-up" sequence. I think that if you move the naza at anytime during that sequence it doesn't zero the gyros & accelerometers correctly and that may cause it flip at take-off.
if its the 1st flight of the day it may also flash red depending upon the number of sats it has, or not has, as the case may be. finally it will flash green 5 or 6 times (never counted them) to indicate it has registered that location as the "home position" for GPS.
I usually plug the batt in at the "take off" area, then wait for it to complete the whole sequence and has confirmed the "home position" before even arming the motors and spinning up for take-off.
I hope this is helpful, happy flying

 

[Roger Ramjet]

I think the musical tones are from the ESC's, I always watch the LED on the naza VU, it flashes a of sequence of red, amber & green a few times then several (4 i think) flashes of green, then it will show what flight mode its in, nothing for manual, amber for atti, green for GPS which is the end of the naza "boot-up" sequence. I think that if you move the naza at anytime during that sequence it doesn't zero the gyros & accelerometers correctly and that may cause it flip at take-off.
if its the 1st flight of the day it may also flash red depending upon the number of sats it has, or not has, as the case may be. finally it will flash green 5 or 6 times (never counted them) to indicate it has registered that location as the "home position" for GPS.
I usually plug the batt in at the "take off" area, then wait for it to complete the whole sequence and has confirmed the "home position" before even arming the motors and spinning up for take-off.
I hope this is helpful, happy flying

That sounds pretty much like what I used to see and hear. I totally agree with this. Thanks for the precision and happy flying!

 

[OneStopRC]

Sounds good to me too, I am going to do the same from now on. It can't hurt and this really was the first time I had done this in this manner. Slightly windy day, plugged the battery in, just inside my garage and directly moved it outside to the driveway. Should have known better, but these things happen...

Thanks for the heads up.

 

[SMP]

I think the musical tones are from the ESC's, I always watch the LED on the naza VU, it flashes a of sequence of red, amber & green a few times then several (4 i think) flashes of green, then it will show what flight mode its in, nothing for manual, amber for atti, green for GPS which is the end of the naza "boot-up" sequence. I think that if you move the naza at anytime during that sequence it doesn't zero the gyros & accelerometers correctly and that may cause it flip at take-off.
if its the 1st flight of the day it may also flash red depending upon the number of sats it has, or not has, as the case may be. finally it will flash green 5 or 6 times (never counted them) to indicate it has registered that location as the "home position" for GPS.
I usually plug the batt in at the "take off" area, then wait for it to complete the whole sequence and has confirmed the "home position" before even arming the motors and spinning up for take-off.
I hope this is helpful, happy flying

Solid advice. Going to make this part of my pre-flight.

 

[quad flyer]

most welcome, just trying to share & help