We have designed a 2-inch 3D-printed frame for the drone.
All electronics work fine on the carbon fiber frame (2-inch), but with the printed frame, sudden yaw spins occur.
This printed version is already very stable structurally, yet the yaw issue persists. Could anyone please share your thoughts or suggestions?
UPDATE1: frame, if it’s frame issue or related?
Any ideas about the yaw spin issue?
Is there anyone can help me with those motor outputs?
Any idea on how to solve or what work should be started with?
Two motors are much higher than the two other ones? Can you identify which ones and whether this is due to a yaw imbalance? Have you checked the motor axes and whether they are maybe tilted slightly one way?
@JulianOes Thanks for your reply!
I have change those electronic components to carbon frame, which works fine. So it’s definitly some thing to do with the frame. But I don’t know why?
Look at the axes angles. If they are slightly tilted favorable to yaw, that helps.
I optimized the installation of the damping balls (adjusting the verticality/parallelism of the fixing screws and replacing the damping balls with ones of different hardness), which had a significant impact on yaw. Now the inner-loop FFT looks acceptable, but after adding the outer-loop optical flow, I noticed it cannot hover properly. It still feels like there’s an issue somewhere. Could it be that the 3D-printed arms are not rigid enough?
I can’t tell from your description. You can share a log and maybe someone has an insight.
@JulianOes Thanks, I have put the log in previous post.
Motors #3 and #4 are consistently on one side, while #1 and #2 are on the other side. The carbon frame follows the order #1, #3, #2, #4 and remains essentially level, with the sum of the power output of #1 and #3 basically equal to that of #2 and #4. I really can’t figure out what the issue is.
So it’s a right/left imbalance? What frame type are you using? Is it normal quad like this?
And are the ESCs calibrated?
It’s just a Quadrotor H, it flys ok when in stablized mode. But…
I’m NOT sure what might be the issue caused this motor imbalance.
Any idea?
Ok, so motor 1 and 2 are working much harder, so that hints definitely at a yaw imbalance.
We are trying to troubleshoot an issue and identify its root cause. Could you suggest a clear direction or recommend effective methods for root cause analysis?
