Hi im Trying to animate multiple Cam Lobes on a single shaft

Like Soenter image description here

and each Lobe is at a different interval to each other which is where I have drawn a blank. and each Lobe should drive their own individual Valve

Does anyone have a super Solid Solution to this

Here is the File if you need the Physical Camshaft and Valve Setup to help me with my rigging problems


Have you considered using Shrinkwrap constraints?

Here. the valve-rod is parented to an Empty, which is constrained to be projected onto the surface of the cam, down its own Y axis..

enter image description here

If the slight penetration is a bother, maybe that could be tweaked out by keyframing or driving the constraint's offset, or influence? Or by having a hidden, slightly reshaped cam, to displace the Empty,avoiding intermittent intersection with the rod.

Example settings.. the Empty is constrained to the Cam, projected.

enter image description here

| improve this answer | |
  • $\begingroup$ how to I do the Projected Constraints $\endgroup$ – DODGE26 Oct 21 at 12:09
  • 1
    $\begingroup$ Hi, @DODGE26. It's a Shrinkwrap constraint on the Empty, with settings as shown in the edit, the sphere is parented to the Empty. $\endgroup$ – Robin Betts Oct 21 at 12:59

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