taking a thickness measurement on a spherical surface

[Joe Arnold]

We have a part with a spherical surface in it that requires a thickness measurement. How can this be done? Construct a line of some hrough the two surfaces?

Any help would be appreciated

[John Kingston]

Point or ball mics?

Just kidding.

Measure the outside sphere. Measure the inside sphere.
Create an assignment.
Thickness = (outer sphere diam. - inside sphere diam.) /2
or
Thickness = (outer sphere rad. - inside sphere rad.)

[Wingman]

Hopefully you have enough surface to get a good Sphere. If so, then one really easy way is to translate to the sphere and sample radial points along the same vector on both sides and report 3D Distance.
HTH,

[John Kingston]

Hopefully you have enough surface to get a good Sphere. If so, then one really easy way is to translate to the sphere and sample radial points along the same vector on both sides and report 3D Distance.
HTH,

Never thought of that Bill. Cool idea.

[cmmguy]

Hopefully you have enough surface to get a good Sphere. If so, then one really easy way is to translate to the sphere and sample radial points along the same vector on both sides and report 3D Distance.
HTH,

AND your CMM positions well...

[cmmguy]

We have a part with a spherical surface in it that requires a thickness measurement. How can this be done? Construct a line of some hrough the two surfaces?

Any help would be appreciated

Is it spherical on both sides of the wall?

[John Kingston]

Is it spherical on both sides of the wall?

I made that ASSumption.

[cmmguy]

Me too, that is why I thought it should be asked now that we solved his problem

[Wingman]

I made that ASSumption.

Well, seems a pretty safe assumption to me. If it wasn't then it would be a pretty dumb callout to ask for thinkness UNLESS you had a specified Gage Point. Wouldn't it?