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Compass calibration, counter clockise or clockwise?
2014 17 2016-10-19
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asimokid
lvl.2

Indonesia
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Big question for me, have 3 month old Ph4. And start with watch every dji tutorial. And i see to compass calibration do a counter clockwise move (turn left) But in real world every people i see do a clockwise for calibration
So which one for calbration? Turn left (counter clockwise) or turn right (clockwise)

*do calibration counter clockwise and clockwise i and my other people not have a problem.
2016-10-19
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labroides
Captain
Flight distance : 9991457 ft
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It makes no difference ... do it either way.
Just don't do it every flight
2016-10-19
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Punchbuggy
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labroides@yahoo Posted at 2016-10-20 15:32
It makes no difference ... do it either way.
Just don't do it every flight

Why would it matter if done as part of the pre-flight readiness check? I can't see that it's possible to 'over calibrate'...
2016-10-19
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lilsou
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Punchbuggy Posted at 2016-10-19 22:26
Why would it matter if done as part of the pre-flight readiness check? I can't see that it's possi ...

There have been instances where people have calibrated it in a new location that had interference, which caused their drone to do crazy things.

If those factors are not present, would not hurt to calibrate the compass every time. In fact, it is good practice since the temperature, etc. all play a role in the calibration.
2016-10-19
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labroides
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Punchbuggy Posted at 2016-10-20 16:26
Why would it matter if done as part of the pre-flight readiness check? I can't see that it's possi ...

Firstly, your compass doesn't lose its calibration so recalibration isn't necessary
Second, there are many, many crash stories that begin with .. I calibrated like I always do.
Unnecessary recalibration brings the risk of a bad calibration and the kind of people that are always recalibrating and more likely to be the kind of people that don't know where not to calibrate.
2016-10-19
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asimokid
lvl.2

Indonesia
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So calibration counter clockwise and clockwise makes no difference?

Yeah i always calibrate before flight.  It's make me mor comfortable

Thank for replying!
2016-10-19
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labroides
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asimokid Posted at 2016-10-20 17:41
So calibration counter clockwise and clockwise makes no difference?

Yeah i always calibrate before ...

You don't calibrate the compass before every flight to make you more comfortable.
That's a superstitious ritual which can make your flying less safe.
Understand what compass calibration does and when it's necessary and fly safer.
http://www.phantompilots.com/thr ... plete-primer.32829/
2016-10-19
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Geebax
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Australia
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lilsou Posted at 2016-10-20 17:15
There have been instances where people have calibrated it in a new location that had interference, ...

'In fact, it is good practice since the temperature, etc. all play a role in the calibration.'

Actually temperature etc plays no part in the compass calibration routine. Nor does 'etcetera' whatever that may be. This is again an example of the misinformation posted about the compass that simply adds to the general confusion.

As has been said by Labroides, it is not necessary to calibrate your compass before each flight and doing so only increases the chance of getting a bad calibration.

2016-10-19
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labroides
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asimokid Posted at 2016-10-20 17:41
So calibration counter clockwise and clockwise makes no difference?

Yeah i always calibrate before ...

For anyone that still thinks calibrating the compass is good, so calibrating more must be better, here's an example of what being in the calibrate-every-time club can do for you:

And not all members are as lucky as he was.
2016-10-20
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ProQuad
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asimokid,  when I calibrate mine, I calibrate it in the counter clockwise direction, but I don't think it matters.
2016-10-20
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cadbob
lvl.3
Flight distance : 18360 ft
United States
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I just turn it in my hands, not my whole body turning with it. It always lands within in a few steps from me.
2016-10-23
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labroides
Captain
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cadbob Posted at 2016-10-24 00:01
I just turn it in my hands, not my whole body turning with it. It always lands within in a few steps ...

Whether you turn it in your hands or make the big circle doesn't matter.
What's important is that the compass gets exposed to a full 360 degree rotation.
The compass has nothing to do with how close your Phantom lands in RTH.
The GPS does that and it's an unrelated system.
2016-10-23
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johnchao411
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Taiwan
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labroides@yahoo Posted at 2016-10-20 14:16
Firstly, your compass doesn't lose its calibration so recalibration isn't necessary
Second, there  ...

Back in the year of P2s, the compass occasionally goes error after taken off from the ground.... You'd like to calibrate the compass all the time if you've seen that before.
2016-10-23
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quanthonytrang
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Depends what hemisphere you live in.
I'm from down-under and I do it in the way my toilet flushes, which is anti-anticlockwise

All jokes aside, it shouldn't matter.
Just make sure you prime it in an open field free of any magnetic influences. Just remember, what the compass sees on the ground will be different in the air.
2016-10-23
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KM5RG-Robert
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I think Seinfeld does it with a clockwise swirl.
2016-10-23
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kirk2579
First Officer
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United States
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asimokid Posted at 2016-10-20 02:41
So calibration counter clockwise and clockwise makes no difference?

Yeah i always calibrate before ...

it is not really a good idea to always do

once set it is good forever or until a event or hardware change etc.

set mine last march and have flown weekly since without issue and will continue so.

He was correct about all the posts starting with---I just calibrated.......

old saying about if it aint broke don't fix t holds true here!

take this from a long time flyer with compass issues ever....

good luck and have fun flying!
2016-10-23
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kirk2579
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johnchao411@gma Posted at 2016-10-23 21:55
Back in the year of P2s, the compass occasionally goes error after taken off from the ground.... Y ...

that actually was a bad compass setting , set at the take off spot..
when that occurs---had 2 p2's

he describes EXACTLY what we are saying and why NOT to do it always
2016-10-23
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kirk2579
First Officer
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lilsou Posted at 2016-10-20 02:15
There have been instances where people have calibrated it in a new location that had interference, ...

That would be the IMU calibration

that temperature and air density  being level and such is involved in

not the compass- --
a compass is a compass, it sets direction and no more
2016-10-23
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