Swashplate trembles

[Gerdklaus]

Hello Thomas,
on the last attempt to take off, the heli suddenly pitched forward and damaged the main rotor blades. I didn't touch any sticks.
During the test run, the swash plate trembled several times.
I show that in the video.
What could be the problem.
In the last flights (2022) everything was normal.
The heli didn't crash.
Greetings Gerd

[ZeXx86]

Hello,

it look like a strong static discharges.

Is your receiver wiring PWM?
Or are you using a digital protocol? With PWM this kind of problems is much more apparent.

[Gerdklaus]

Hello,
I don't think it's static discharge.
I installed an equipotential bonding.
I am using a Futaba FASSTest receiver with Sbus2.
Next I swap all 3 TS servos.

Greetings Gerd

[ZeXx86]

The issue is not caused by servos. I would look for receiver wiring.
Please describe how it is all wired. Are some telemetry sensors used?

[Gerdklaus]

I use a UniSens-E current sensor on the Sbus2.
The sensor was installed in 2022 and has not flown since then. I will remove the sensor and test again.

[Gerdklaus]

The problem is solved. Without telemetry there is no more shaking.
One last question:
When i switch the altitude limit and when i switch the rescue, does the swashplate have to go up and then down again after 1.5s?
With my system, the swashplate (on the table) always stays up, so the heli would always climb.