[K...] Posted October 5, 2021 Share Posted October 5, 2021 When can we apply following evaluation Options When we define or construct plain? • LSQ • Minimum Feature • L1 Feature • Inner Tangential Feature • Outer Tangential Feature Thank you Link to comment Share on other sites More sharing options...
[Ma...] Posted October 5, 2021 Share Posted October 5, 2021 It depends on norms and drawings - usage or base definition can be case too. Link to comment Share on other sites More sharing options...
[SH...] Posted October 5, 2021 Share Posted October 5, 2021 Please sign in to view this quote. LSQ for ISO standards Outer or inner for ASME. For datums does not a matter ISO or ASME you should use OTE. Minimum feature is used for the form error evaluation of plane. L1 l have no idea!!! Link to comment Share on other sites More sharing options...
[Is...] Posted October 5, 2021 Share Posted October 5, 2021 We normally push the designers to be more specific in the drawings:modifiers.png Link to comment Share on other sites More sharing options...
[SH...] Posted October 5, 2021 Share Posted October 5, 2021 Please sign in to view this quote. sorry to say that this will not help OP. Link to comment Share on other sites More sharing options...
[Is...] Posted October 5, 2021 Share Posted October 5, 2021 Please sign in to view this quote. Why not? These modifiers come from ISO GPS and also are included in the Piweb reporting... Link to comment Share on other sites More sharing options...
[SH...] Posted October 5, 2021 Share Posted October 5, 2021 Please sign in to view this quote. He is asking about plane evaluation, your giving something different, anyway that was good information. I have not seen them in Pi-web!!!. Link to comment Share on other sites More sharing options...
[Jo...] Posted October 5, 2021 Share Posted October 5, 2021 Your evaluation method depends on your intent(drawing or engineer intent) or per a standard. Typically a plane would use Min. feature when evaluating flatness. I use LSQ when using it for an alignment. When used as a Datum it would be OTE. If you are using a Plane symmetry you can also change the method to see (pass thru) width or minimum stock to clean up from machining. The PiWeb note is revealing when viewing a customers report, because it informs you of their method.. Most ppl never noticed it is even there. This is similar to cylinder evaluation. Each application has an appropriate evaluation method to communicate the part condition. It is helpful to note your method when reporting results. Link to comment Share on other sites More sharing options...
[Is...] Posted October 5, 2021 Share Posted October 5, 2021 Please sign in to view this quote. why is different?distance.pngeval.png Link to comment Share on other sites More sharing options...
[SH...] Posted October 5, 2021 Share Posted October 5, 2021 This calypso definition template, not pi Web. Anyway iam not in argument with you. Good night.. Link to comment Share on other sites More sharing options...
[Is...] Posted October 5, 2021 Share Posted October 5, 2021 Please sign in to view this quote. ......Good night..gg gx.png Link to comment Share on other sites More sharing options...
[Er...] Posted October 6, 2021 Share Posted October 6, 2021 The evaluation is partly dependent on the point density. More points closer together are needed to make filtering and outlier elimination function well. Which in turn affects the evaluation. With points spaced far apart, LSQ is best. Sometimes it depends if a standard like ISO is applied and or specified. Is there a specific measurement that is giving issues?Evaluations applied.JPG Link to comment Share on other sites More sharing options...
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