Compound angle

[[Cl...]]

The angle callout between each tooth is 60° ± 2.0° The problem is that
each plane is at a compound angle, so how do I evaluate angle accurately
plane to plane when both are at a compound angle?

[[Mi...]]

It's hard for me to tell what angle you're interested in measuring. Is it the tooth-to-tooth 60° angle? Or from one side to the other of the same tooth? If it's the first one, just use a symmetry constructions, but the second is more complicated.

Generally, though, for compound angles I'd say intersect with a theoretical plane to get two lines, then measure angle between those.

[[Cl...]]

The angle between the two planes shown in the attachment, from one side to the other between each point.

[[Mi...]]

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Then I would make a theoretical YZ plane and intersect them with that. The angle between the intersections should be 60°.

[[Cl...]]

I'll give that a try, thanks.

[[Mi...]]

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Actually that won't work. I'll get back to you if I think of something else.

[[Cl...]]

I was thinking of something similar. There is a vertical OD cylinder below the teeth.
I could intersect each plane with the cylinder and use those for the angle between.

[[Mi...]]

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How about:
- symmetry plane construction between the two planes
- secondary alignment. ID (or OD) cylinder for spatial rotation and origin, symmetry plane for planar rotation
- Result Element that calculates Plane1.A1+Plane2.A1

[[Cl...]]

That's worth a try, thanks.

[[Te...]]

Angle Between Features (From and Location / Angle Between Features)should work if you are looking for the compound angle
If you are looking for a 2d angle you need to project them to a common plane (real or theoretical)