RIG – Wire Fingers

Set this up in TOP view.

IK upper arm to the nub, which is hidden under our hand box.

Link hand to nub.

Align pivots.

Set up pivots of box hands and fingers.

Align orientation of hand to nub, fingers to hand.

Make a point helper.

 

Wire EACH finger, starting with the one closest to the hand box, Rotate Y to Rotate Y with the Point Helper in charge.

This will make the point helper 100% control the finger joint rotations.

If you need to get control of each joint ALSO, do this.

Place helpers between each joint.

Link end joint to helper to middle joint to helper to starting joint.

Link the main point helper to the hand box so it moves along with the arm.

You could also wire the finger rotation to a position on Z on the helper, then you are working with translation data not rotation data.