Z-Axis Vibration in large Y6

[Agridroni (Antony)]

I made many changes to the original frame to try to solve the vibration problem on the Z axis but with partial success.
I made the following changes from the original setup
Cube black
Motor MN505S 320 kw
Propellers 20" and 22" (test propellers)
Frame motor to motor 105 cm:

1. I mounted the Kore board on the rubber pads
2. I eliminated the joints on the front arms
3. I have shortened the front arms
4. I reinforced the frame with 4 L-shaped aluminum bars that connect the arms
5. I mounted T-Motor 20-21 "propellers

The vibrations during autotuning are in the standard values, while in Auto they go out in particular the clipping increases quickly.
At this point I think the center plates are too flexible and a 3mm plate is needed
https://drive.google.com/file/d/1tmHxdQV6Hh-oOJSIjzfE608g15fXR8cn/view?usp=sharing

[xfacta (Shawn)]

Not related to vibrations, but could you mount that GPS up higher away from the batteries and electricals?

[Agridroni (Antony)]

My primary compass it’s the RM3100 and the second the compass in the Here2, and I have not interferences

[doug (doug s)]

I had similar issues on a quad 8 with similar motors propellers, I think because of the motor wires, rubber dampers on Kore does not work, unfortunately i solved that problem with using original cube carrier board with rubber damping plate (cheapest one on internet) and using Kore only as PDB. If you find a suitable way to keep Kore from vibration please let me know also

[Agridroni (Antony)]

HI @doug this damping system work well with my setup

Zero Clip Z now, increased a little bit Vibe x but in the range, I’ll try different rubber type.

[doug (doug s)]

that looks good, my main concern on using Kore on big drones motor and power wires will carry some vibrations if they are a bit tight. If you keep this post updated, it will be appreciated.