Filtering Free Form Surfaces

[[Cl...]]

I am recalling several 2d curves into a FFS to use for a profile evaluation. How do you apply filters to a FFS?
The two choices I see are; Gauss & Tschebyscheff. If I apply either one of these filters, the profile goes WAY
out of tolerance.

[[Cl...]]

I'm guessing that the two filters available (Gauss & Tschebyscheff) in the Free Form surface evaluation can only be used if you create the FFS from faces? As opposed to creating it from recalled 2d curves, which would be filtered themselves? Am I wrong here?

[[Me...]]

Sorry to answer a question with a question, but how are you getting your nominals for the free form surface if you're recalling curves to create it? I'm using an older version of calypso, but I thought that a free form surface had to be directly linked to a CAD face/faces? I'm probably missing something. Just trying to learn.

[[Cl...]]

Rather than using a FFS (in some cases) I create several 2d curves and recall then into the FFS. Sometimes when you create a FFS from CAD model faces you get way too many points, that overlap into unwanted areas, so I can control this better by using 2d curves.

[[Ri...]]

The Gauss & Tschebyscheff is in reference to the best-fit, not to filtering.

Starting in 2019 you can apply a morphological filtering inside of FFS.

When recalling points into a FFS, make sure to add the surfaces referenced inside of the FFS.

[[Cl...]]

When you say;

"When recalling points into a FFS, make sure to add the surfaces referenced inside of the FFS".

I'm not clear on what you mean by "make sure you add the surfaces"

[[To...]]

The nominals come from the CAD model. So, you create the FFS from the Features > Special Geometries menu. Recall the points into the FFS. Select the surfaces on the model that you want evaluate. Done.

[[Cl...]]

That I know. I just misunderstood what Richard was stating. If I use the method you mention Tom, I get points that when scanned, overlap onto other surfaces, causing the stylus to shank. So, In this particular case, I am building the FFS by recalling several 2d curves into a FFS, so I can control their placement. My question is; "If I filter the 2d curves before I pull them into the FFS, will the filter setting remain in the FFS?"

[[To...]]

I'm pretty sure when re-calling points, you're importing raw un-filtered data.