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I attempted to rig this mechanism just like the video but didn't really know where to start. Any information/help would be amazing.

Picture of what I'm trying to rig:i The mechanism I'm trying to replicate: https://vimeo.com/359913559

Blender file with the models: https://www.dropbox.com/s/3ycyxw4vhuvvb23/RigAnimation.blend?dl=0

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enter image description here

Start from the first half of the mech: a wheel that's driving a two part arm. Put the head of a bone exactly in every center of rotation of all joints (use Shift S, selection to cursor and cursor to selected, for precise placements). Starting from the bone that drives the force A, B is simply son of A and acts as target for the IK bone chain C,D. E is simply son of D (keep offset), and it will be the IK target of the 2nd part IK chain.

enter image description here

Part 2 is simply another IK Chain, bone E is target for the IK chain F,G,H,I. The only difference is that every bone of the chain has locked the rotation axis that in real world would be constrained by its rigid nature.

Which axis to constraint it depends by the bone roll (you can set it in edit mode). A good habit is to rotate the roll so that the main rotation is along positive X Axis, and you can turn on axis visualization to help understanding which axis to lock.

enter image description here

I added on the end a third IK chain (L,M) form bone E head to bone H tail, just to drive the rotation of the smaller part of the piston, because it was getting a big rotation out of its natural axis (in your video this longitudinal extra rotation is absorbed by imprecision of the joints).

enter image description here

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  • $\begingroup$ Is there any way you can send me a download link for the blend file? I am very new and don't know much about Ik's or rigging, would like to see how you managed to put everything together in the file! Also, thank you for your response! @josh sanfelici ... not sure how to @ someone or get their attention on this. This is how far I got: gyazo.com/af075a9bfe565cea29d8ee0df240a074 $\endgroup$ – Cake Butter Cheese Sep 15 '19 at 3:32
  • $\begingroup$ wetransfer.com/downloads/… $\endgroup$ – josh sanfelici Sep 15 '19 at 11:25

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