Well, I have 2 Phantom 2 V2 the first was new, bought on autorized dealer that is ok. But i bought other one (cheap on ebay) with the intention of practice with it yesterday it arrive. Testing I found when throtle it begin to shake really bad I think... what can I do? There is something to do to fix it? There is not back money warrant with the seller ( was selled like used as is as ), one motor have a really low noise maybe that? It's not my video but exactly that happend. HELP!!!

   Here is the video!


      

Have you flown it? It looks like it's shaking due to the prop wash and ground affect. Try the new one and see if it does the same thing. I feel like it will.

Is it possible landing gear has a crack in it???

My guess is that it is not designed for full power while the legs are stationary.  As in other post the problem is the engines create a lot of torque ant the frame will give a little by design.  Much like a high performance car, when you go full throttle from idle the body of the car actually twist .  This is the motor trying to turn itself around the crankshaft. That is one reason you have the camera on a gimbel.

My opinion is it is nothing, go flying and have some fun.

I would also check for out of track/out of balance blade.  A slightly bent prop shaft might do that.  Run it up again and check for heat buildup at the motors after shutdown.

Raybro Posted at 2015-4-22 23:53
Have you flown it? It looks like it's shaking due to the prop wash and ground affect. Try the new on ...

   

    Thanks for the reply I try the new one replying the same conditions ... Stable like a rock... My friend. So discard the ground effect.

Raybro Posted at 2015-4-22 23:53
Have you flown it? It looks like it's shaking due to the prop wash and ground affect. Try the new on ...

   

      My friend well I want to be sure before fly it but, yes I gonne  out to fly it and see  what happend then. I keep you informed.

jmanaya Posted at 2015-4-23 01:15
Thanks for the reply I try the new one replying the same conditions ... Stable like a ro ...

Check your props and the motor then, check for hairline cracks,
As you stated, you bought is used AIWI!...could have been crashed or submersed in water...Only God knows...

TheRann4u Posted at 2015-4-23 00:27
Is it possible landing gear has a crack in it???

      Good point. I just check it nop is like new my friend... and overview I can that is really new shell all over.

I looked at your video again. It appears to be a lateral viabration.  That sort of rules out the blade out of track.  The bent prop shaft appears to be a better place to look.  Blades out of track usually cause a vertical vibration.

TheRann4u Posted at 2015-4-23 00:27
Is it possible landing gear has a crack in it???

  

     My friend all seen really solid. I rechek it!!!

oakspi Posted at 2015-4-23 01:24
I looked at your video again. It appears to be a lateral viabration.  That sort of rules out the bla ...

  

    What do you think I have a new props. I try them and I post it in some minutes.

Make sure you check the motors for heat buildup after you shut it down

oakspi Posted at 2015-4-23 02:07
Make sure you check the motors for heat buildup after you shut it down

    The weather dont let me fly today... tomorrow I hope the weather get better but check this. [img]https://forum11.djicdn.com/data/attachment/forum/%5BURL=http://s908.photobucket.com/user/jmanaya/media/20150422_131957_zpsn5cmld1c.jpg.html%5D[/URL][/img]
Maybe this dont let the prop tight ?! check a litle hit at top of the motor

That could be the problem I would replace the motor just to be on the safe side.  

Have you run the motors up with props off. Looked it your picture.....could be bent as well.

jmanaya Posted at 2015-4-23 06:21
The weather dont let me fly today... tomorrow I hope the weather get better but check this. [ ...

I would replace motor , these things run on the fact things are level and balanced.
that shaft rotating at take off speed would create all kinds of vibrations/wobble

jmanaya Posted at 2015-4-23 06:21
The weather dont let me fly today... tomorrow I hope the weather get better but check this. [ ...

Well you found what is causing your vibration.

Raybro Posted at 2015-4-23 07:16
Have you run the motors up with props off. Looked it your picture.....could be bent as well.

   Yes I have I think that without props the effect dont take effect. Anyways without it dont shake I test with a new ones also same result.

Sounds like the props then. Check all the screws to make sure the motors are tight. Maybe they are not DJI props? The damaged shaft on the motor, will the prop fasten properly to it? Without props, do the motors spin true?

Raybro Posted at 2015-4-23 07:27
Sounds like the props then. Check all the screws to make sure the motors are tight. Maybe they are n ...

   I do all that you say screw and I try with new from package props still the same, I don't live in USA so is really hard to get a new motor only for check it... so I want to be sure before make the purchase here is expensive and take a lot of time (30 days or more ) I really love these machines but my hobby here is for people apasionated for it...

I think a motor shaft may be bent. With props off and motors running do you see the shaft wobble?

jmanaya Posted at 2015-4-23 08:43
I do all that you say screw and I try with new from package props still the same, I don't live  ...

You could always switch the motor with the other off the opposite end as it is same same and see, if you have to replace one your gonna have to pull it anyway!

Raybro Posted at 2015-4-23 08:46
I think a motor shaft may be bent. With props off and motors running do you see the shaft wobble?

        Well friend that is the most logic explain that I hear, I discard the prop,   are news from the package from the new one Phantom 2 box, ckeck all the motors screw are tight, the integrity  of the shell is really ok, also I take measure from the new one (separation of the motors) and compare with it and are OK.  There is a way to check if the shaft is bend?

jmanaya Posted at 2015-4-23 08:59
Well friend that is the most logic explain that I hear, I discard the prop,   are news fr ...

Spin the motor by hand and see if it wobbles, or turns true.

   


       SOLVED!!! The problem was that the prop tight, but don't get to the correct place by a half turn I think... (it has to be adjusted making a certain number of spin to be balanced with the other black prop) so it doesn't keep the same distance to the motor amazing is less than a milimiter. I take the dremel and recons the last spin that is crush in the motor's shaft top - see the picture-- Tomorrow I fly and test it. The shake dissaper.

Sorry about my english I hope the explain is clear.   Thanks to all for your help you are the best!!!!

I found that the best way to check this kind of issue is: with the phantom tie with tie zip to nivel table, Test with only one prop then turn it on and full throtle repeat with each one so you discard the other. Be sure that your props are DJI and are good shape or better new to do this test BEST Regard!

jmanaya Posted at 2015-4-23 10:56
I found that the best way to check this kind of issue is: with the phantom tie with tie zip to nivel ...

o.k.,
Thanks for the update, it was not a bent motor shaft but still a problem with the shaft...i saw that blob on your earlier posts an almost commented on it but have never seen anything like it before, possibly the original owner had a problem from day one they could not solve, their loss, your gain, but it goes to show that QC control if that was from original manufacturing can go a long way and that bird should have never left the nest that way.