HK500TT + ZYX oscilating servos problem

I've instaled Tarot ZYX 3axis gyro on my HK500TT with ALIGN DFC flybarless head. But I get constant tail vibrations, after changing all moving parts I did bench test and found, that at max head speed the servos oscilating. I believe that is causing the tail vibrations similar when too much gain is set.

[@bmpowellicio]

People are guessing wildly. I'd disconnect the servo links to see if the oscillation is caused by the head mechanically, or coming through the cables from electrical disturbance. If the latter, hold each component away from the vibration of the frame, or electrical interference to identify where it's coming from. The obvious items are the shafts, so disconnect each in sequence . Helicopters can be frustrating, I once had a HK450 that developed a severe wobble after months of flying fine. After

[@dude7422]

hi it could be a bad tail shaft just a super small bend in it or front jack shaft even a bad bearing i know a lot of guess work

[@alvaroarias4939]

i have same problem with my TREX 450, what are you doing to fix???

[@elxero2189]

Do you have the correct pulse settings for these?

[@alvaroarias4939]

i find the problem, check your servos becouse any servo have a voltage or mecanical problem in my case is a mecanical problem