Undesired wobbly Parent rotation

[spare whale]

Hello,

When selecting the bone (prop) it rotates fine but when selecting Parent/folder (rotor) it gets wobbly. I have noticed this behavior a few times in the past when doing multiple angles but back then I was able to simply carefully align the bone. This time it is not an option since I would like it to be animated.

It is probably something simple with the pivot point I just cannot really figure it out.

In the picture - file structure.
In the .gif first few seconds the bone is selected - works fine, then the parent/folder is selected and the propeller gets wobbly when rotated.

Thank you.

[chrome anvil]

try changing the bones mode from local, bone global. Or add a bone in between the 2 to counter it.

[spare whale]

Yes, I tried changing mods Local-Global, deleting and making new bones, and moving around the parent folder. I also recreated the same issue on a completely new project (light brown cubes). I manage to fix the issue with parent rotation in Edit mode (if I change rotation for the bone to 0 and Parent to needed rotation ) but as soon as I go into Animate mode the issue is back...

I am truly clueless on what is going on there 😐

It feels almost like the bone (propeller in my case) doesn't rotate like "the steering wheel" but kind of around the pivot point in a weird angle (quite visible in the video with brown squares). Maybe there is such an option somewhere I might have enabled by accident?

[dawn bear]

pretty sure it works as intended, to rotate a bone on one axis only like those rotor, make sure to keep the bone rotation at [0,0,0] in its bind pose (in Edit mode), then use Bone rotation in the animation

[chrome anvil]

Im pretty sure this isnt a blockbench issue and instead is a common 3d modeling issue as many programs have this issue.

[spare whale]

I really do not know... As Cubouse suggested I did set the bone and parent rotation in Edit mode to 0 and changed rotation in animation but to no avail. As soon as I start to rotate the propeller as the steering wheel it all goes haywire. Maybe the other 2 parent folders are to blame as those are also in an angle...? Although now in the Edit mode rotation of the other two parent folders displays as 0 rotation yet those bones are clearly in an angle (if I visually level rotation goes into negative values).

If there are no other suggestions I'll just try tomorrow to rebuild it from the inside out (start with this small rotor animation and do the other two animations afterward) Maybe I have messed up somewhere terribly.

Either way thanks guys for the assistance. 👍

[chrome anvil]

yeah you just have to mess with it until it works.

[dawn bear]

that's not the proper way to do it, I took for granted you had the rotor in the correct rotation in the bind pose, but that's not the case.

It should already be laying flat, ready to spin on one axis only. You can rotate the cube inside the bone as much as you want to achieve that, it won't matter in Bedrock.

Say you have the rotator flat by default (facing up), if you want to rotate the rotor forward while it is spinning, you should use two bones:

The parent one to rotate the rotor forward or watever other direction, and the child one to spin, only needing one axis in the keyframe

[spare whale]

Took a bit of time until I got it right but it is alive! Thank you guys and thanks Cubouse for the advice! 🙂 I have been fiddling around only with simple animations so far and this was a bit of a challenge. Hopefully, other people will also be able to learn from this.

[dawn bear]

!close