Scan vs single point probing

[[Zo...]]

Probing on a few radii on a cylindrical part with a #3 stylus of star system, Calypso tells me that "Not enough probing points" when scanning the features, a R.06, R.093, R.25 and R.44. I tried 5,10,25,50,100,1000 points to no avail, but after switching to single point probing, 5-6 probes will do the trick.
I prefer scanning, but not able to on these radii. I do scan the top plane and outside dia for alignment with no issues.
Any thoughts anyone on why I couldn't scan radii?, Well, the CMM does scan them, but the report shows the error I mentioned above.

Thanks

[[Cl...]]

Based on what you've posted, all I can add is;

Make sure the stylus (ruby) size is commensurate with the radius
(feature) size. Make sure the point spacing/speed are adequate.

[[To...]]

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Depending on the length of the arc, scanning speed may be too fast. After you scan the feature, open the feature, right-click in the CAD window and select Show Actual Points. Repeat this process and select Show Masked Points. If all you see are RED points, your scanning speed too fast. Try slowing it down.

[[Ro...]]

I personally have no problem with touch points, at times i prefer them.
I know the Zeiss Calypso 'thing' is scanning, and i know that some people hold tight to scanning, but when dealing with small sections of a feature (a slice of a cone or sphere), short arcs or small diameters im probably going to use touch points.
Time needs to be addressed tho, because touch points will make a program length get out of hand in a hurry.

I also have an XT head so when scanning i can scan faster and without all those 'air scanning' errors that the XXT probe gets, that could be another reason you're not getting points.

[[Ri...]]

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One of the things that is covered in the Advanced Class is using touch points for incomplete features. There is an exercise in measuring a small radius. It's also covered at the same time as constraints.

[[Ro...]]

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I think the advanced class was the first class i took, i'm not 100% sure i ever took the basic.
That would have been 12+ years ago.
one of my constant gripes about Zeiss training is that your class was probably different than my class, because Zeiss doesn't (in my experience) start at chapter 1 and work their way thru the text like PCD does. so depending on who was in my class and what questions they asked, and what the instructor deemed important is what we would have learned in my class.