# Basic Ik broken

**URL:** <https://forums.unrealengine.com/t/basic-ik-broken/2681882>\
**Category:** Character & Animation\
**Tags:** rig, unreal-engine, question\
**Created:** [December 4, 2025, 4:04am UTC](https://forums.unrealengine.com/t/basic-ik-broken/2681882 "2025-12-04T04:04:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![KMzuru](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/kmzuru/32/88707_2.png) [@KMzuru](https://forums.unrealengine.com/u/KMzuru)\
**Post date:** [December 4, 2025, 4:04am UTC](https://forums.unrealengine.com/t/basic-ik-broken/2681882/1 "2025-12-04T04:04:08Z")

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Trying to use the basic IK but the arm is broken in a sort of zigzag pattern, not sure why, need help.

([Screen capture - cfc4a4ded056b8642450b9eef8dbaf57 - Gyazo](https://gyazo.com/cfc4a4ded056b8642450b9eef8dbaf57))

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<div class="post-metadata">

**Author:** ![TechAnim\_Tools](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/techanim_tools/32/1213818_2.png) [@TechAnim\_Tools](https://forums.unrealengine.com/u/TechAnim_Tools)\
**Post date:** [December 4, 2025, 7:52am UTC](https://forums.unrealengine.com/t/basic-ik-broken/2681882/2 "2025-12-04T07:52:17Z")

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You need to check the primary and secondary axis based on your skeletal hierarchy.

Changing the values there would change the arm behaviour.

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<div class="post-metadata">

**Author:** ![KMzuru](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/kmzuru/32/88707_2.png) [@KMzuru](https://forums.unrealengine.com/u/KMzuru)\
**Post date:** [December 4, 2025, 8:33am UTC](https://forums.unrealengine.com/t/basic-ik-broken/2681882/3 "2025-12-04T08:33:34Z")

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Took a bit of looking but through this I found a video that explained what to set the axis to, thank you! ([https://www.youtube.com/watch?v=s5yJlJGjjDE](https://www.youtube.com/watch?v=s5yJlJGjjDE))