Welcome to Multi-Rotor UK. Please login or sign up.

Thursday,August 22, 2019, 14:42:46

Login with username, password and session length

Shoutbox

Andy7:
22 Aug 2019 10:27:36
Sure. But basically, all the subjects are getting cut off.
Gaza07:
21 Aug 2019 18:14:54
Can you pm me a screen shot of what you mean
Andy7:
21 Aug 2019 12:15:41
Gaza - can you make the subject line section in the forum topic list wider? It's cutting off the subject field really short.
Andy7:
19 Aug 2019 09:14:20
Good for you!  ~~
DarkButterfly:
18 Aug 2019 19:13:57
Had another negative encounter, it's been a few years since the last one, just an uneducated ******, going on about drones being illegal yada yada yada.    :-/
Still that didn't spoil my flying time, had an absolute blast  ~~
Gaza07:
07 Aug 2019 19:52:01
ooooh mrs jones  :D
hoverfly:
30 Jul 2019 15:26:34
D.B. you tightwad.. :cool:
atomiclama:
29 Jul 2019 20:14:10
DB that just means you have shed loads of props in the first place ;-)
DarkButterfly:
29 Jul 2019 18:53:33
Just had a thought, even with all the crashing I've done, I haven't bought any replacement props in over a year ~~
ched:
09 Jul 2019 19:45:42
May the sun shine and winds be light for BFU#8. Son't forget lots of vids for those of us unable to attend.  :D
Members
  • Total Members: 8066
  • Latest: badger1
Stats
  • Total Posts: 196576
  • Total Topics: 19804
  • Online Today: 44
  • Online Ever: 530
  • (Tuesday,June 26, 2012, 08:34:46 )
Users Online
Users: 2
Guests: 42
Total: 44

Theme Changer





3d - Printworx

Printing 3d Forum

Initial lift off

Started by rsmith21, Wednesday,July 03, 2013, 18:12:59

Previous topic - Next topic

rsmith21

Has anyone else found that the initial lift off with their NAZA is a little scary\shaky manual input required to keep it going up. after I land subsequent lift offs are much more controlled, I';m referring to GPS mode ?
KK2, NAZA M/V2 ugrade, Spektrum DX 8, Hubsan X4
Immersion 25Mw vtx, GoPro 4, Black Pearl Display
Walkera 2 axis gimbal

Smeagol

Similar experience, although I have only had a few flights, was put down to acclimatisation of the GPS to the outside temperature.

After sitting at home, then a car journey, then the outside world, possibly a few degrees change. Some recommend lifting the craft out first and letting it settle while getting ready to fly.

With mine I found that the first attempts to hover it seemed to drift a bit, after a short time it settled fine.


DarrenG

How long are you waiting after connecting the battery. The GPS requires a little time to get a position fix and a little longer for that fix to settle down. Ideally you need to allow a minute or two for it to get an optimal position fix before lift-off.
Darren Griffin
@DarrenGriffin, @TheMacFixer & @PocketGPSWorld
Sky-Hero Little Spyder with Naza V2, Arducopter Quad with Pixhawk and Emax 250 with Naze32

rsmith21

Quote from: DarrenG on Thursday,July 04, 2013, 13:33:12
How long are you waiting after connecting the battery. The GPS requires a little time to get a position fix and a little longer for that fix to settle down. Ideally you need to allow a minute or two for it to get an optimal position fix before lift-off.


Maybe not waiting long enough then. Its like its in manual mode for the first few feet wobbly then stable.
KK2, NAZA M/V2 ugrade, Spektrum DX 8, Hubsan X4
Immersion 25Mw vtx, GoPro 4, Black Pearl Display
Walkera 2 axis gimbal

DarrenG

Could well be the GPS then. Perhaps use Atti mode for the few few minutes if you';re itching to get in the air?
Darren Griffin
@DarrenGriffin, @TheMacFixer & @PocketGPSWorld
Sky-Hero Little Spyder with Naza V2, Arducopter Quad with Pixhawk and Emax 250 with Naze32

powerlord

I find with the naza it seems to adjust cog each take off,  but only uses the settings on the next flight (power cycle).  So for example if you';ve moved something about: take off a foot and move a wee bit around,  land,  power cycle and now it will have adjusted to new cog and fly well.  Took me a while to work out that was what it was doing - unlike say arducopter which makes no automatic cog adjustment

Sent from my HTC One using Tapatalk 4 Beta


KK1W

John has an interesting take on the problem in his blog. Makes sense, going to try take offs in Atti and see if it makes a difference.

http://www.rcgroups.com/forums/member.php?u=42040

I agree about the Naza takeoff, but that being said I haven';t had any problems.

Jim
Jim/KK1W

Hands0n

Steve King has a video on the need to let GPS settle before lift off. He suggests a full 3 minutes and demonstrates a rather compelling case for doing so. Admittedly his video relates to GPS Hold (Loiter) and GPS Home (RTL) where the aircraft tend to circle widely. Using his 3 minute method they home in much tighter and reliably. In yet to actually try it out at a field but it seemed better in the back garden.

Sent from my Nexus 7 using Tapatalk 4 Beta

--
Danny
"Its better than bad, its good"

Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
Aircraft: miniMax Hex, DJI 550 (clone) TBS Disco, 450 Firefly, 250 Pro, ZMR250, Hubsan X4, Bixler 2

KK1W

Did one liftoff today. Waited for GPS lock plus a few minutes, then switched to atti and took off slowly. Not a wobble on liftoff. Only one test so hardly confirms or denies I';m afraid. :(

I fully agree with waiting a full three minutes or more. When I';ve hurried the process GPS hold can easily look like GPS ';toilet bowl';. The red light stops flashing at over 6 satellites, typically I see about 10 on my other units and would expect Naza to be similar. Worth the wait for sure.

Jim
Jim/KK1W

rsmith21

Only problem is the flight time being reduced while you wait, I feel the ESCs get a little warm even at zero RPM so it must be consuming power, I wonder if its possible to give the NAZA its own power, or does it have to be the same source as the main battery.
KK2, NAZA M/V2 ugrade, Spektrum DX 8, Hubsan X4
Immersion 25Mw vtx, GoPro 4, Black Pearl Display
Walkera 2 axis gimbal

DarrenG

With no load the drain would be pretty negligible and will only affect the first battery in a session?
Darren Griffin
@DarrenGriffin, @TheMacFixer & @PocketGPSWorld
Sky-Hero Little Spyder with Naza V2, Arducopter Quad with Pixhawk and Emax 250 with Naze32

Hands0n

Of course ... I meant Peter King, and here';s his video where he demonstrates the GPS lock issue with a Crius AIOP but goes on to say that this issue affects all FCs with current day GPS.

Video here -->

It all makes sense I suppose.  That and how well your GPS board performs in the first place.  I keep reading that uBlox is the best. Thats not what is on my HK MultiWii Pro - and it definitely does the toilet bowl thing. Scary in the back garden, probably not so when out in the field.
--
Danny
"Its better than bad, its good"

Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
Aircraft: miniMax Hex, DJI 550 (clone) TBS Disco, 450 Firefly, 250 Pro, ZMR250, Hubsan X4, Bixler 2

Leigh

here';s how a multirotor should take off - just don';t watch past the first 30 seconds unless you want to see how it shouldn';t land :-)

Aussie on the loose in Belfast.

rsmith21

WOW that was some landing :) , I don';t think I want to be that good  :sick:

I waited 3 mins today and took off it Atti mode and no problems, so patience is the key, thanks again all, another problem solved. :notworthy:
KK2, NAZA M/V2 ugrade, Spektrum DX 8, Hubsan X4
Immersion 25Mw vtx, GoPro 4, Black Pearl Display
Walkera 2 axis gimbal

Hands0n

That 3 minute wait might as well be half an eternity  :rofl:
--
Danny
"Its better than bad, its good"

Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
Aircraft: miniMax Hex, DJI 550 (clone) TBS Disco, 450 Firefly, 250 Pro, ZMR250, Hubsan X4, Bixler 2

rsmith21

A few more flights today and after waiting the prescribed time perfect take off. As you say it takes an eternity, check email, check face Book, look around , twiddle thumbs.  :crossfingers: :rofl: Take off.
KK2, NAZA M/V2 ugrade, Spektrum DX 8, Hubsan X4
Immersion 25Mw vtx, GoPro 4, Black Pearl Display
Walkera 2 axis gimbal

Hands0n

Same here. Three flights today. The first had the full 3-minute pre-flight GPS treatment, Loiter and RTL were spot on. The second flight I didn';t wait after the battery change, Loiter was vague and RTL was about 7-10 metres off.  The third flight was prefixed by the 3-minute wait and use of Loiter and RTL were on target again. 

Next up, I';ve got to sort out the ALT PIDs, mine bobs around like a cork on the ocean at times. I';ve got the Baro in a nice foam coat with the FC inside a nice tupperware-style container (hint, Wilkinsons, £1 a pop).
--
Danny
"Its better than bad, its good"

Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
Aircraft: miniMax Hex, DJI 550 (clone) TBS Disco, 450 Firefly, 250 Pro, ZMR250, Hubsan X4, Bixler 2

Leigh

Quote from: rsmith21 on Saturday,July 06, 2013, 21:30:22
WOW that was some landing :) , I don';t think I want to be that good  :sick:

I waited 3 mins today and took off it Atti mode and no problems, so patience is the key, thanks again all, another problem solved. :notworthy:


Hehe yes, patience is key. FWIW, the repair was under an hour to get flying again.  I spent another hour improving the yaw block rod to a 7mm dia shaft with M6 thread and threadlocked it into the back boom.  No slopvnow and it wont pull out again in a hurry!
Aussie on the loose in Belfast.