Question regarding "Connect Segments" under filtering

[[Ri...]]

The slideshow under the old forums describes the "Connect Segments" checkbox as:

"The segments of an interrupted contour are formed to create a continuous contour, with as many points possible being taken into account. This means that you can select a stronger filter."

So, if I have a series of individual linear scans (parallel to one another) on a planar surface that I am evaluating. Would I want to check this box and connect those individual scan lines? Or does this only apply to segmented, complex interpolated profiles (like curves, or multiple circle segments)?

It doesn't state what it is that it actually does, or how that will affect the results. Might anyone here know?


http://knowledge.imt.zeiss.de/streaming ... tegy_8.htm

Thanks everyone! 🤠

[[Ri...]]

The book has the exact same sentence in it. Absolutely nothing more can be found on the topic.

They should shackle the person who wrote these atrocious instructions to these forums to answer for this ridiculousness. 😃
Competent instructions would not leave you with more ambiguity than you had before you read it.
Love operating a machine with incomplete documentation 😡 .

[[Ja...]]

Richard,

If I am not mistaken, a contour (or isoline), is by definition a planar section of a 3D graph (in this application). This implies that each segment of the interrupted contour are coplanar. So there's that.

I assume that what Calypso will do is connect each end point of a segment with each start point of the next segment so long as they are coplanar.

I don't see much use for this in your instance of a planar region, as the points that it creates will be purely synthetic and will only allow you to select a stronger filter (and not throw away start/end points from each individual scan). Is this being more representative of the plane? I would argue no. I think the best case for this "Connect Segments" would be a circle scan on an O.D./I.D. where you have to interrupt the curve for extruding features/holes and you don't have much of the surface to begin with, thus eliminating start/end points would have a detrimental effect.

Just my assumptions.

[[Ri...]]

The application of this for interrupted curves as you describe makes good sense to me. That's logical.
I think I understand now.
Checking this in my example would only server to reduce the point masking count when the individual paths were combined into a single path.

Super simple example:
4 single scan paths on a plane.
25 points per path/line.
100 points total.

-2 points at the start and finish of each path/line for masking.
Thats -4 points per path, 16 points in all dropped.
84 points remain for evaluation. .

If I then check "connect segments" it then evaluate these 4 separate paths as a single path/line.
This would drop my masked point total from -16 to -4, increasing the point density as described, but introducing a significant amount of noise as those were supposed to be masked for good reason.

This clears things up. Thank you.

[[Ja...]]

Richard,

In a sense, I would guess that your example would be correct, but here's the kicker. By selecting "Connect Segments" you have more points with which you can select a stronger filter and thus eliminate the noise that was originally kicked out.

But in the event of an interrupted circle path like I had mentioned, maybe you have four holes perpendicular to the path that you have to skip over. Think of a bore with two perpendicular thru holes forming a plus sign. Depending on the size of the holes, let's say you only have 45 degrees of arc in each corner. Now your circular section is only composed of four interrupted segments (losing points at the start and the end) and only 180 degrees of arc. It might be better to extrapolate, or theoretically simulate, the missing sections of arc. With these theoretical points in your data set (double the total number of points), you can apply a stronger filter to eliminate the added noise and possibly have a more repeatable feature.

[[Ri...]]

Ahhhh. There it is, your master of the language!
As you stated:

"Adds theoretical points, extrapolated from measured segments to complete an incomplete or interrupted profile."

Now would that of been so hard for them to write!

Thank you, for translating that back to english for me 😜

[[Kl...]]

CALYPSO do not calculate additional Points to close the gaps.
The Deviations after the gap will be shifted to start of the gap to get a closed Point sequence to calculate the filtered actual.
The Output is related to the measured position and views the gaps.

For outlier it works normally well, but if there are systematic jumps from Segment to Segment the start and end area will have a worster uncertainty (Peak or shift at gap Limits).

Inside curve the filter works different (Gaussian Deviation filter), therefore it looks smoother.

Inspection is created by CALYPSO 2019 to simulate effect.

ConnectSegments.zipConnect Segments.pptx

[[Ri...]]

Hey Zeiss>? Care to chime in ?! 😡
Or is Zeiss content to just let its paying customers sit here and guess ad nauseum at their own peril?


After reading the last post , I'm now more confused then when I started.