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Typhoon 500 with Rakon frame problem

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Used a Rakon frame to rebuild a Typhoon G, can not achieve to control it while flying, goes to the right or left by itself without control from the ST10. As this is my second frame, got advice from this forum in how to locate the compass and have successfully fly the first Rakon.
The only difference with this second Rakon is the landing gear that I use the original Yuneec legs. I have been moving the compass to different places in the landing gear, also change a new one compass trying to find the problem. On the GUI everything appears OK : GPS, ESC, Motors all green. Since I am using the parts from a crashed Q500 it is possible ??? that the control board is damaged, or the landing gear could be the problem ?
 

WTFDproject

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The first thing to check is the hardware monitor on your controller to ensure the stick readings are steady when the sticks are not being moved.

Otherwise, what you are describing can be a symptom of a bad IMU on the drone mainboard. They are hard to find. And hard to replace without some tools not normally available to the average person. Not impossible. But pretty close to it.
This thread has some very good discussion about replacing the IMU.
 

h-elsner

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I would start to check motor assignement in GUI and sensor behaviour. Also it would be good to have a look on the flight logs from one of the flights with strange behaviour.

I still think about the compass. Is it mounted in the right direction, away from wires with hight current? Did you use brass or copper screws for mounting? Can we see a picture, compass in detail and overview where it is?

br HE
 
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On the Controller Sticks, notice that right stick J4 do not return to 0 but 3, do not move by itself, all other are OK.
Checked the motor assignment and front B motor was not in the right order, verified the esc and motor wiring, did the assignment again and now are good, this could be the problem. Attached is a picture of the compass location, the screw is steel, I am going to glue it instead.
Thank you both for your advice and help, will try to have it in the air again 🤞, anyway the Rakon frame is more resistant and can be repaired. (The MK58 was not connected to power on the flight test)
IMG_20220411_203457379.jpg IMG_20220411_203457379.jpg
 
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WTFDproject

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On the Controller Sticks, notice that right stick J4 do not return to 0 but 3, do not move by itself, all other are OK.
Checked the motor assignment and front B motor was not in the right order.
The motor was probably the big problem, but you need to clean the stick pots. They don't act the same every time when they have corrosion, and any corrosion is always a problem. Either "now" or "soon". See this article by @DoomMeister. ST10 pots are the same as ST16.
Control Stick Gimbal Maintenance
 
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I would start to check motor assignement in GUI and sensor behaviour. Also it would be good to have a look on the flight logs from one of the flights with strange behaviour.
From what I understand, the drone is flying but not in a very controlled way. If the motors are mixed up, the controller would not be able to stabilize the aircraft at all. I would wonder if it manages to reach more than a few centimetres of height before flipping over. Therefore I do not think it is anything related to the motors.
 

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