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    cntl_MCH parent to arm_02 breaks my rig

    wrongwright
    posted to: Rig a Crane Arm - Part 05

    @4:20ish the cntl_MCH is parented to arm_02..does this so the bone will track better.  I thought it was so the MCH wouldn't pull apart but that's later it seems.  I haven't a clue to Troubleshooting this.  I am trying to read the relationship line and understand.  It might already have a connection to arm_02.   Including a link to the rig.  Please gimme a clue what's going on and I can try to fix it but right now I'm about burned out.  Will sleep on it and look for a clue tomorrow.  https://www.dropbox.com/scl/fi/746byoanydxv1fu0l2uip/Crane-arm_rig_START_TS_MCH_Parent_Final.blend?rlkey=b95wgrshx9n8ck3a1ck1oexr0&st=xoy3wxvx&dl=0

    1 love
    Reply
    • Dwayne Savage(dillenbata3) replied

      That's because your IK constraint on arm_02 should have CNTL as it's target instead of cntl_MCH.

      1 love
    • Wayne Dixon replied

      Hey Wrongy.
      Dwany is correct.

      The target of an IK constraint can't be part of the same chain.  

      So how do you fix this?

      • Change the target of the IK constraint to be the CTRL (not the MCH)
      • Parent the MCH bone to the arm_02
      • Give yourself a high five cos it's fixed
      2 loves
    • wrongwright replied

      Thanks to everyone, I haven't exactly woke up yet but when I do I'll come back around to my notes and make sure I didn't write it down wrong.  Hate to repeat the same thing later.  I'd be happy if I just mis-clicked the silly thing.  I'm going to have another look at the pre-broken rig to try and read what you're seeing.  Thank you Dwayne and Wayne.


      Ed did it...er..Edit

      So turns out I had the IK instructions written down correctly, I just didn't click the right thing.  Hate it when that happens.  Thanks again to all.

      1 love