Kaparcheo
 lvl.1
France
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Automatic translation (French to English) made with Google trad
Hello, bonjour à tous,
This message to tell you that I found a method to solve my problem of vibration of the gimbal and the "floating / ripple" of my videos made with Phantom 4 pro.
I describe my approach
1) I managed to calibrate the gimbal by making it outdoors far from any structure in order to have "real" working conditions. The calibration was carried out on a non-metallic support.
I had already had an identical problem a few years ago (in Soudan) with an S900 equipped with a Wookong M.
2) In certain positions (or even in neutral position) the gimbal emits a noise quite identical to that of a servo motor which vibrates around its neutral.
These vibrations appeared very quickly after the purchase of my personal Phantom 4 pro and the one I use with my archaeological team in Sudan. I never had this problem with my Phantom 3 pro nor with that of the mission.
This noise had not worried me until now because I worked almost exclusively in photo mode. For two years, my archaeologists wishing to also have videos I confronted these image distortions.
My analysis of the problem :
- The Phantom 4 pro is placed on a table and powered up.
When the vibrations appear, it is enough to gently touch the camera on each side of the horizontal arm so that they cease and the significant distortions of the video stop.
So my fingers work like a small shock absorber. Vibrations are therefore at the origin of video undulations.
- To replace my fingers (it's more practical to fly!), I therefore make a mini U-shaped arm in thermoformable carbon-fiber composite (4 grams, see photo) whose arms are slightly closed.
It is fixed on the original gimbal arms with two small rectangles of double-sided adhesive, and makes the vibrations and undulations of the video disappear whatever the position I take with the Phantom 4 pro.
- A new calibration of the gimbal is carried out with the new device.
3) A flight test will however show the persistence of small undulations of the video which I still attribute to vibrations.
So I checked if my propellers were still balanced ... unfortunately not ! Balancing of the 4 propellers is therefore carried out.
4) New test flight: all is OK, but we have to see if it continues over time. Is this nacelle noise due to a mechanical anomaly of the nacelle or a programming bug ?
---- In total : Addition of a shock-absorbing U-shapped arm + calibration of the gimbal + balancing of the propellers = stable videos without "floating" arctefacts.
If this device shows a lasting effectiveness I must plan, for my next archaeological mission, to leave with equipment to balance my propellers and a small U-shapped arm ready to be installed.
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