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+1

​Min / Max point on colormap

dan brokstad 8 years ago in Metrology Software / PC-DMIS • updated by neil kay 5 years ago • 2

Min / Max point on colormap is not representative to surface.
This point will "nearly" always be on the surface edge!
And this value is used when you evaluate Profile surface dimension.
If you take a look at pictures below and special on the colormap / colormap scale. 99 percent of this surface is green and orange. The Profile surface dimension value should be around 0.5 but it is 0.756 (ASME).
This because of what I believe error from the scanner.
Different ways to solve this could be:
Let the Min / Max be on a colormap "area" and not as a point.
Or an outlier filter...
Image 26

ute burton 8 years ago

Hi @dan.brokstad. The example you show here can be easily done in PC-DMIS because it is a plane.

  1. Create a Laser Auto Plane and click on the CAD surface.
  2. On the Feature Extraction tab, click the CAD Offset checkbox. Use this value to shrink away from the edges.
  3. On the Feature Extraction tab there is a new setting in 2017 R1 which allows you to filter out points which exceed an angle. Use this to filter out noise or scanned points outside the angle of the plane.
  4. Create a COP using the plane as input. Then create the colormap.

It becomes more difficult when the surface is curved. Currently we don't have a way to shrink back from the edges of a curved surfaced the way that we do for the plane. But we do have this planned for future development.

dan brokstad 8 years ago

Hi Ute

I know about the plan option, this was just a example.

I hope for a solution on curved surface as you describe...

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