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enter image description here so i want make that object only rotate on x-axis just like mechanical joints.

i have lock all this object transform except x-axis but still not work. how to solve this? enter image description here

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The axis locks are a UI feature that only provides a simple lock in the 3dview and they are easy to work around. To completely limit transformations you should use constraints. Constraints are the last thing applied to an object, they will limit the transformation values even if you have keyframes on the value that are outside the constraint settings.

For your example the Limit Rotation constraint will prevent rotation on a specified axes, you can also limit the rotation to a range so that you could only rotate the joint 45 degrees.

A limit with min and max at 0.0 will prevent any rotation, you may also set both at a certain angle.

Limit Rotation constraint settings

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  • $\begingroup$ to which bone i should add that limit rotation? i'm sorry i'm still confused $\endgroup$ – Wilman Darnasutisna Apr 6 '17 at 9:48
  • $\begingroup$ The bone that you don't want rotating. $\endgroup$ – sambler Apr 7 '17 at 2:59

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