SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
ralfrcgroups's blog
Posted by ralfrcgroups | Dec 02, 2012 @ 08:15 AM | 1,634 Views
#6468
Quote:
Originally Posted by zokizo View Post
i dont know it is a bad gps calibration or what

my problem is drift
i have in gps mode just green lights flashing so thats mean all gps is found but for first 2-3 mins of hover i have drift backward-right

after few mins gps hold position works very fine

why i have drift for that first 2-3 mins?
Common problem that some of us see, and can't nail down the exact cause.
u2builder, TahoeEd, and I have bothe seen a little of this.
Here's a sequence to try to shorten the 2-3 min:
Take-off in Atti
Get positioned and switch to GPS.
If you get initial drift, switch back to Atti for a few seconds.
Then switch back to GPS.
This sometimes "settles" the Naza FC into a good GPS lock.
The culprits discussed have been:
Movement of the airframe when GPS is switched on
Wind forces being dealt with when GPS is switched on
Slightly out of balance airframe (check your COG)
Intermittent GPS interference
A touch of uncorrected TBE
There are more, but I can't recall them all...

i got some drift too but my solution is :
- turn on transmitter
- power up the machine on manual mode
- switch to gps mode
- wait until full gps (green only)
- power off the quad and wait a few seconds
- power up again on gps mode and wait until full gps lock
- ready to fly
Posted by ralfrcgroups | Dec 01, 2012 @ 12:39 PM | 1,451 Views
#6442
T J Gilbert

@zokizo
Quote:
Originally Posted by zokizo View Post
this is been very fast thanks

one more question
does the attitude gain and basic gain of pitch and roll must be the same?
i read manual and there is 3 model of dji (330,450,550) and all have same inputs
for attitude and basic gain
sorry for stupid question
Not stupid questions...
But they've been asked before.
A recommended starting gains is (from TahoeEd):
140/140/140/140
100/100
I fly my F450 with gains:
150/150/150/150
100/100
Attitude and Basic gains address two different things, and don't necessarily need to be the same.
Go to my blog and find my post entitled "Gains" for more detail...