1 Attaching the Spherical Connection Shaft to the Phantom 3 Main Body
(1) As shown in the photo below, attach the Sphere Connection Shafts (T-shaped black parts on the left and right) to the Phantom 3 main body and secure.
(2) For the Phantom 3, on the underside of each motor, there are four screws for securing the motors. In order to attach the Sphere Connection Shafts, remove two of these screws (two screws for each motor, with four motors, for a total of eight screws). As for which two screws to remove, looking at the Phantom 3 from above like the photo, they would be the ones running lengthways (front-to-back).
(3) Please secure the two left motors of the Phantom 3 to the Sphere Connection Shaft labeled “← left side when facing forward,” using the new screws included. To determine which of the Phantom 3’s motors are the two left motors, first, view the Phantom 3 from behind; then after moving so that you are directly above it, they will be the two motors seen on your left.
(4) Similarly, please secure the two right motors of the Phantom 3 to the Sphere Connection Shaft labeled “← right side when facing forward,” using the new screws included.
* Note: (3) and (4), in reality, both the Sphere Connection Shaft labeled “← left side when facing forward” and the one labeled “← right side when facing forward” are the same, so there is no issue with fixing them on the wrong side. Only, due to receiving numerous inquiries relating to the question of “Which side should I attach it to?”, for the sake of convenience, we have defined a specific side for both parts.
2 Assembly of the sphere
(1) Assembling the upper side (the same for the lower side) (All glued)
(2) The opening on the top of the sphere
The opening on top of the sphere needs to be removed, so absolutely do not apply instant adhesive.
Note: If the black carbon rod on the sphere opening is removed many tens of times, it is possible that the insertion section will become loose and the carbon rod will easily slip out. This is dangerous during flight. If this happens, apply instant adhesive to the carbon rod along the 4 mm section of the tip to make it thicker. This will prevent it from slipping. However, do not insert the carbon rod into the blue joint until the instant adhesive has dried.
(1) The only part on the spherical guard that can be removed is the opening for the Phantom 3. All other sections of the spherical guard are glued together and cannot be made into a hemisphere.
(2) The maximum combined thrust (lifting power) of the 4 DJI Phantom 3 motors is approx. 3,200 g. This is sufficient power to lift the 1,790 g gross weight of the PAUI Rotating Spherical Drone Guard 3 for Phantom 3, allowing it to fly stably. However, flight time will be affected. →(3)
(3) [Very important] Flight time is 12 – 15 minutes. Keep an eye on the remaining battery level on the monitor and promptly land the drone once the warning message appears.
(4) [Very important] Disable the vision system on the Phantom 3. If the vision system is activated, the Phantom 3 will detect the sphere and will not operate.
If the Phantom 3 vision system mistakes the rotating spherical guard for the ground it can run out of control, as the below video shows.
4 Flight Procedure
(1) Make sure the transmitter power, DJI Phantom 3 main unit power, and DJI GO app are on.
(2) [Very important] Disable the vision system on the Phantom 3.
(3) [Very important] Perform compass calibration 360 degrees horizontally and 360 degrees vertically.
* Make sure to perform every time you exchange the batteries. Failing to do so may make it impossible to control the drone.
* If there is battery life remaining after the first flight, perform the second flight as below.
1 If the motor is still on after the first flight (if the propellers are still rotating), there is no need to perform compass calibration; the drone will fly stably during the second flight.
2 In contrast, if the motor is stopped (if the propellers are stopped) after the first flight, the drone will not fly stably during the second flight. In this situation, it is required that you perform the compass calibration and as in (4) below work on the drone on a flat surface (when the motor stops the main controller (MC) will judge that the drone has landed on a flat surface. However, the drone will actually be moving diagonally inside of the sphere. The MC will then be unable to detect that the drone has landed on a flat surface, causing it to be unstable for the second flight).
(4) Place the Phantom 3 on a flat surface, and wait until it receives a GPS signal.
*By placing the drone on a flat surface, the main controller will remember at which position it is parallel to flat ground. If the main controller has forgotten this, it may be impossible to control the drone.
(5) Insert and set the Phantom 3 into the spherical guard. Please refer to the below.
(6) [Very important] Manual take off
Push the two proportional control system sticks to the front and inwards to start the engine, and perform take off by gradually raising the elevation stick. Do not use the automatic take off function on the DJI GO app. Using the automatic take off will cause the app to think that the motor output has been overloaded, due to the fact that the drone is heavier than normal, causing the motor overload warning to show on the app. After that, an over discharge warning may appear.
(7) [Very important] Manual soft landing
*Please perform soft landings so as not to inflict excess impact on the rotating spherical guard. Specifically, momentarily stop descent at 10 – 20 cm off the ground, and then land the drone slowly. Do not use the automatic landing function on the DJI GO app. Be careful when landing on concrete in particular.
(8) Remove the drone from the rotating spherical guard