Scanning a "Plane" that is actually a Cone

[[Je...]]

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Hello.

I am scanning a .030" thick stamped metal surface that is nominally defined as a plane but due to forming is more like a cone (see scan arrows below).

Should I rescan this surface as a cone using the captured cone angle, or should the points interpolate correctly as is?

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[[Me...]]

This all depends on what the plane is to be used for.

If you're capturing the form(Flatness), location, or alignment use a plane with outer tangential so you grab the high points. Or (and maybe a more preferred way) you can use a separate plane and recall only the outer ring points.

If you're reporting the form/error of the surface, then I would report the cone angle and maybe the Z-Value of each diameter area so you can see the slope.

Something like this, I would output into a color representation with scan lines drawn from outside towards the center.

[[Ja...]]

What is the distance from high point to low point? I don't know know much about other sensors but I have an XXT. The XXT will not compensate for surface variation when scanning if it's too bad. I don't know what the limit is. I would have to switch from scanning to single points and make sure the search distance is larger than the form error. You can adjust that under resources- feature setting editor- probing- search distance before nominal position.

[[Je...]]

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That's a great idea, Andre. Here's what form deviation looks like using the original circle paths on the plane as well as a line profile of the center section:
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[[Je...]]

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Absolutely.

Fortunately, our VAST Gold is capturing the points just fine, and I included the option for "search distance before nominal" to accommodate for the form error.
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[[Me...]]

Very colorful! I hope the info helped with the issue.