[Th...] Posted March 19, 2024 Share Posted March 19, 2024 I need some help, how do you measure a spline feature?3.png2.png1.png Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/ Share on other sites More sharing options...
[Cl...] Posted March 19, 2024 Share Posted March 19, 2024 Looks like you've sectioned the model already. Create from that section a 3d curve. Multiply the created nominal curve points by 3 (min). and scan. Is the for a profile? Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22724 Share on other sites More sharing options...
[Th...] Posted March 19, 2024 Author Share Posted March 19, 2024 Yes I will use curve scan for profile but also like to report the two basic dimensions either with kink point or intersection but not sure how.4.png Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22726 Share on other sites More sharing options...
[Ch...] Posted March 19, 2024 Share Posted March 19, 2024 2d curve should work as well. Intersection should be fine. If the the geometries are at the end are 3D features, e.g. planes or cylinders, the choices of intersection points might get confusing. If you use lines in stead from your section for example, they tend to produce more stable intersections in my experience. Intersect Line + 2D curve on one end, and Line + same 2D Curve on opposite end. Good luck. -Chris Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22728 Share on other sites More sharing options...
[Jo...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. Maybe stupid question, but what is the reason for multiply the created nominal curve points by 3? Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22730 Share on other sites More sharing options...
[Ma...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. Basic dimensions are not meant for measuring and reporting. Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22732 Share on other sites More sharing options...
[Ma...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. Perhaps point density will be low, but usually it's meant to have 3 measured points for 1 nominal point. Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22734 Share on other sites More sharing options...
[Da...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. The 2023 version does that automatically ! Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22736 Share on other sites More sharing options...
[Je...] Posted March 20, 2024 Share Posted March 20, 2024 . Please sign in to view this quote. . This is by no means a stupid question, and I know I've asked it. The reason for a required minimum of three measured points in relation to a nominal point is that the software employs a designated zone or search area to interpolate actual values. Ensuring the presence of at least one measured point preceding and another following the probable proximal measured point aids in preventing inaccurate interpolations. When ambiguity arises regarding which nominal point has 'custody' of a specific measured point, the inclusion of additional measured points can be instrumental in resolving the ambiguity. . . Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22738 Share on other sites More sharing options...
[Cl...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. When you extract the nominal curve Calypso gives it a default number of points. It's recommended that you increase by 3x that number of nominal points. Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22740 Share on other sites More sharing options...
[Ma...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. I am doing curves by point set - 3d curve, set distance of points rather than number of points ( like 0,02mm to have precise nominals ) - after that i reduce nominals to normal point density ( this way you are getting better spline than by increasing number of points ) Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22742 Share on other sites More sharing options...
[Cl...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. Thanks for the explanation, Jeff. I knew the how, but not the why. Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22744 Share on other sites More sharing options...
[Th...] Posted March 20, 2024 Author Share Posted March 20, 2024 Please sign in to view this quote. Yes but on all our FAI reporting they want to include basic dimensions. Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22746 Share on other sites More sharing options...
[Ju...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. That's when I use a Result Element and input the theoretically exact dimension(s). Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22748 Share on other sites More sharing options...
[Ch...] Posted March 20, 2024 Share Posted March 20, 2024 Please sign in to view this quote. 🤣 🤣 🤣 😃 Thanks Justin - I'll have to borrow that one... great idea. Link to comment https://qualityforum.zeiss.com/topic/5996-how-to-measure-a-spline-feature/#findComment-22750 Share on other sites More sharing options...
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