GPS calibration issues with Naza M V2

[Gearymeister]

hi folks,
wonder if anyone can help me out here.
I just set myself up with a naza M V2 on my quad. I have the GPS and everything seems to be setup up properly, however, when I attempt to cal my compass and i can either do a horizontal cal or a vertical cal but not both as indicated by the software.

is there something blindingly obvious that i have missed?

BTW, all firmware is latest version and up to date.

thanks

chris

[rsmith21]

Describe how your doing it, otherwise we have to assume your doing it correctly :)

[flybywire]

That';s odd, i can understand how the first (horizontal) could pass, and 2nd (vertical) fail, but not t';other way around?  It has to be done horizontal first, followed by vertical, so it seems logical to me that if the first phase fails, then so should the whole process?

If your compass is way out of correction range, you will get red/yellow flash.
Andy

[Gearymeister]

ok fair point,

go into calibration mode and the led goes orange.
rotate the quad through 360 degrees on the horizontal axis all ok and the LED goes solid green. but when you turn it to the vertical axis it just starts flashing red constantly again by the time you do half a rotation.

i looked up youtube and found vids saying to do this http://youtu.be/OxMjTjywbYc

but the quad flies really nicely and holds position well, so i really dont understand


cheers,

chris

[rsmith21]

The book states

If you keep having calibration failure, it might suggest that there is very strong magnetic interference around
the GPS & Compass module, please avoid flying in this area.

He shouldn';t be setting it up inside, there are too many metallic objects that could make it less than accurate, though it obviously works.

I also have to wonder if he';s turning it the correct way, the images in the manual don';t say to turn it like a cart wheel like that, but I may be misunderstanding it.

If your happy with the way it flies it cant be far off, though I';m sure you would be happier if the process completed as it is described by the maker.

I calibrate mine in an open field, once the light goes yellow I hold it at arms length flat as in all arms horizontal and turn round like I';m drawing a circle on the horizon. Once I start the second stage, I turn the quad so it has arms pointing at the sky and ground, then draw another circle on the horizon by rotating my body all the way round, the lights go to normal,  it works for me. I would say ensure you have no large metal object in your vicinity.

Like this   http://wiki.dji-innovations.com/en/index.php/Naza-M_GPS_%26_Compass_Calibration

[ChrisH]

A mistake I made in early days was not to rotate the multi NOSE down for the second (green led) phase. I just used to rotate it whichever way it happened to point so it was 90 degrees to horizontal - then I re-read the instructions and no problem since with calibrating! Also its been suggested slowing down as you approach the 360 degree point helps with accuracy (both horizontal and vertical phase)!

[flybywire]

Yes, I';ve always calibrated my Naza/WKM by rotating it around my whole body, sometimes refered to as the ';Naza dance';!
After putting the latest v.4 fware on my Naza (v1) it detected that my GPS compass was way out of the correctable range in the software, so I had to do ';that trick'; with a degaussing magnet.  That brought it back into line.  If that is the case, you will get alternating red/orange light, and won';t be able to engage GPS mode.

Andy

[rsmith21]

This may be of some interest, but I don';t think I would put a magnet anywhere near my Compass unit http://www.multirotorforums.com/showthread.php?11474-naza-gps-error-27-unable-to-calibrate-gps

A read at this where people have used a magnet and solved the problem, but the description is not very clear, http://www.helifreak.com/showthread.php?t=536238

[Gearymeister]

yeah i tried all that with no success in the middle of the field.  don';t know what';s going on with it. the LED just always flashes red but i can see its all working....

i don';t fancy putting magnets anywhere near it to be honest. sounds like the sort of thing that';ll work for everyone else except me.

bit town tonight coz its been too windy in Aberdeen for flying today.

thanks guys,

Chris

[rsmith21]

post a picture of your machine, is there any metallic fixings on the quad that may be disturbing it. Bolts or anything like that too close will not help, I used brass and plastic on my IFLY conversion to ensure it would be unaffected .

Bob

[flybywire]

';Degaussing'; the compass unit is a bona-fide operation, and one that is occationally very necessary.  Chris, maybe you could post a video clip of the sequence of events vis-a -vis booting it up etc, that way we can all see the lights (pardon the pun).  Also, a screen dump of your compass calibration readout from the assistant would be helpful, just to establish a baseline?
As i said before somewhere, bad compass is red/yellow alternating, not red flashing on it';s own, as far as I';m aware, that';s just bad satelite hookup?

Andy

[Gearymeister]

well it changed to a green red red red green red red red sequence last night after about 5 minutes.

[ChrisH]

well it changed to a green red red red green red red red sequence last night after about 5 minutes.

That';s GPS mode, poor GPS reception I think? Does green change to yellow if you switch to ATTI mode? Check the GPS connector is fully home.

[flybywire]

I know mine can certainly vary between length of time it takes to both;
A: get passed post boot warm up (yellow flash) (between 30 seconds to 2 minutes)
B: Get full satelite lock.
Early firmwares did not go through this warm up routine, so in theory could be ready within seconds, but DJI introduced it some time back, maybe in response to users  in warmer or colder climates having issues?  Not sure.

Not sure it';s a perceptional thing, but it seems that after a major firmware upgrade the processes are slower, then seem to get quicker as time passes.  I can';t understand rationally how this could possibly be, but it does ';seem'; that way to me.  I generally find that after powering it up, once I';ve faffed around with the gopro & goggles etc, that my ezosd has acquired satelite lock, and the Naza has settled down to either a red/green or just green blink. I think one red blink + green means less than 6 satelites.

N.B ezosd will not function with less than a certain amount anyhow (6 or 8), whereas the Naza/Wookong M will.

Hope this helps

Andy.

[Gearymeister]

I sussed it!

think there was excessive vibration to the GPS module so i added foam to dampen it and all good.

thanks for all the feedback folks,

Chris