(15-Sep-2020, 09:48 PM)SaHaRzZz Wrote: II don't see anything problematic with the quad, all the screws are in there tight, maybe the right move is to take apart the whole build and redo it.
But something is bothering me, why is it that just the pitch axis is suffering? the roll axis is completely clean

Good question!


You'd think that a bad motor, a delaminated arm, a loose screw, etc are all part of the same frame and that a vibrating pitch axis would couple to the roll and yaw axes as well. That's often not the way it works though.

I wish I could tell you exactly why that is, but I don't have any quick explanations to hand.

It might be a good idea to check the motors to see if there is any kind of bad out of balance with one or more. Just take the props off and spin up each motor one at a time at different speeds. Keep a finger resting on the arm of the motor you are testing and you'll very quickly feel if there is more vibration and also if it's in a specific speed range (which is likely if it really is an out of balance motor).

(15-Sep-2020, 10:00 PM)unseen Wrote: Good question!


You'd think that a bad motor, a delaminated arm, a loose screw, etc are all part of the same frame and that a vibrating pitch axis would couple to the roll and yaw axes as well. That's often not the way it works though.

I wish I could tell you exactly why that is, but I don't have any quick explanations to hand.

It might be a good idea to check the motors to see if there is any kind of bad out of balance with one or more. Just take the props off and spin up each motor one at a time at different speeds. Keep a finger resting on the arm of the motor you are testing and you'll very quickly feel if there is more vibration and also if it's in a specific speed range (which is likely if it really is an out of balance motor).

I replaced all the screws with a bit longer ones, and cleaned the bottom of the motors from dust just in case.

I also tested the motors for around 5 minutes, trying to figure out if one motor has more vibration than the other, I couldn't find anything :/
in the motors tab the error rate shows 0.00-0.03 when I spin the motors and sometimes spikes to 0.1 and goes back down, does it mean anything?
the motors sound and feel like they are in the same speed when I put the exact value to each of them.

(15-Sep-2020, 10:00 PM)unseen Wrote: Good question!


You'd think that a bad motor, a delaminated arm, a loose screw, etc are all part of the same frame and that a vibrating pitch axis would couple to the roll and yaw axes as well. That's often not the way it works though.

I wish I could tell you exactly why that is, but I don't have any quick explanations to hand.

It might be a good idea to check the motors to see if there is any kind of bad out of balance with one or more. Just take the props off and spin up each motor one at a time at different speeds. Keep a finger resting on the arm of the motor you are testing and you'll very quickly feel if there is more vibration and also if it's in a specific speed range (which is likely if it really is an out of balance motor).

I took a few pictures of the bottom of my frame(TBS Source One) just to ensure everything is OK there -
https://imgur.com/a/Pi2ZRFu

I see a crack on the front of the quad, but it's not a deep crack so I don't think it does anything, and the quad had these vibrations issues from when the frame was brand new so yeah.

I took a second video, after re-seating all the motors with new screws and making sure everything is tight and not moving:

the first clip is with the filters I set and the PIDs, you can see it sounds pretty clean on the ground,
the second clip which starts at 00:40 is at default PIDs + filtering, it sounds noisy, the bi-directional D-shot is enabled on both tests.
I also recorded the blackbox for both tests:
http://www.mediafire.com/folder/vukeyibnd236b

I made these tests just to make sure the issue is visible and audible

(16-Sep-2020, 02:58 PM)SaHaRzZz Wrote: I took a second video, after re-seating all the motors with new screws and making sure everything is tight and not moving:

the first clip is with the filters I set and the PIDs, you can see it sounds pretty clean on the ground,
the second clip which starts at 00:40 is at default PIDs + filtering, it sounds noisy, the bi-directional D-shot is enabled on both tests.
I also recorded the blackbox for both tests:
http://www.mediafire.com/folder/vukeyibnd236b

I made these tests just to make sure the issue is visible and audible

Not quite sure what ur trying to relay here.... but change yoiur frequency to 48k in BL heli 32 and you will hear a difference in smoothness BIG TIME>