Gimbal Crazy after flex changed

[Daniel.Pedrosa]

Hi there,

I've got P3 Advanced. Unfortunately, I had an accident and dropped from sky, resulting in the arm that holds the camera cutting off. It's now repaired and a new flex has been installed, but it goes crazy. Please see the video attached and let me know what your thoughts are. Is it maybe a further problem? Like a cpu problem?

Thanks very much for your much appreciated help.

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[quaddamage]

Possible reasons:
- Incorrectly assembled gimbal,
- Damage in one of the motor control boards
- Damage in gimbal Top Board

Actions to fix:
1. Try to re-assemble the gimbal
- clean all contacts with alcohol in the process
- make sure each part is mounted in a proper position
- note that it is possible to assemble the gimbal incorrectly in many ways
- look for physical damage on the gimbal control boards

2. If that won't help, you can't do much more without parts from a second gimbal:
- Try replacing all the arms (whole moving part) with a working one
- If it helped, then try parts of the gimbal until you find the part which causes the issue
- If it didn't helped, then the issue is in the Gimbal Top Board

What can you do without a second gimbal:
- you'd have to capture the communication which the gimbal sends to the rest of the drone, and analyze it with Wireshark
- you could also analyze the logs on a mobile device, as they *might* have the gimbal status packets stored
- in both cases, i am not sure if anyone is able to tell you how to interpret the data and how to link it to a specific malfunction

 

[Nightwolf]

Make sure the roll motor is oriented correctly. Behind the tombstone looking cover the flat part should be on top. Pointed in toward the circuit board. It's possible to install that 180 out

 

[mdowney58]

Additionally, make sure that the pitch motor shaft (going into the camera) flat side is facing the rear of the bird. Put mine together backwards, and have seen it posted here that others have also.

 

[Joker2415]

I'm new to drones and working on them. I ran into the same problem twice this week. The first time I took it apart and put it back together...it worked!! So, I had no idea what had caused it.

I ran into it again today after assembling a gimbal. All of the above posts answer the question of why it could be happening. And have already made the mistakes mentioned. haha I think I had done everything wrong to that gimbal that was possible!!! After looking I thought" wait a minute!! The camera box is upside down!! How is that possible?!!" haha

Search youtube for Phantom 3 "crazy gimbal", "chicken dance" , "dancing gimbal". Something like that is what I found it under. It was easier for me to watch video's since I could see what they were talking about and showing.

After watching the video's I realized I had multiple problems going on from not assembling it correctly or things that were tweaked during it's crash.Start at one end and work your way through it, checking connections along the way and positions of everything. You'll find the problem!! There was even a video showing how to test the The variable resistors on the motor control boards, if you have a meter.