[Mi...] Posted December 13, 2024 Share Posted December 13, 2024 Per the pic attached. I have a bore machined into this part, and they are wanting a profile callout in the mentioned zones. How would one do that? Do I make 4 or 5 traces up through the zones and report profile from those points? Not sure how to attack this callout. Kinda new to profiles as we do not use them here much Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/ Share on other sites More sharing options...
[Cl...] Posted December 13, 2024 Share Posted December 13, 2024 (edited) I do a lot of these and that's exactly what I do. I start and end at the exact coordinates on the I - J, J - K, K - L. In this example. I'd scan 4 (or more) equally spaced curves vertically around each bore recalling them into a FFS. With no datums involved. Do a best-fit w/alignment and evaluate to that. Edited December 13, 2024 Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122582 Share on other sites More sharing options...
[To...] Posted December 13, 2024 Share Posted December 13, 2024 (edited) Please sign in to view this quote. Can't you just use the "No Datum Reference Frame" in the Profile in lieu of the best-fit? Edited December 13, 2024 Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122584 Share on other sites More sharing options...
[Cl...] Posted December 13, 2024 Share Posted December 13, 2024 (edited) I had this conversation recently with one of the AE's from Zeiss and this is what he recommended to me. Or is it 6 of one, half a dozen of the other? Edited December 13, 2024 Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122586 Share on other sites More sharing options...
[Ri...] Posted December 13, 2024 Share Posted December 13, 2024 It's probably safer to perform Clarke's method, so that you can control the fitting algorithm for the FFS. Having said that, the results shouldn't be grossly different unless there are some localized deviations. Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122606 Share on other sites More sharing options...
[Mi...] Posted December 13, 2024 Author Share Posted December 13, 2024 Please sign in to view this quote. Ok Sounds Good. Guess I was along the right path. So after you scan your 3D curves, are you saying to bring all those points back into Free Form and evaluate? Ill give it a shot lol Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122610 Share on other sites More sharing options...
[Cl...] Posted December 13, 2024 Share Posted December 13, 2024 (edited) Yes, with a surface profile you'll have to use a FFS. From one veteran to another. Thank you for your service! Edited December 13, 2024 Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122612 Share on other sites More sharing options...
[Ri...] Posted December 13, 2024 Share Posted December 13, 2024 If you're license is old enough where you don't have FFS, I've had good luck with the Alignment From Several Curves. Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122614 Share on other sites More sharing options...
[Cl...] Posted December 13, 2024 Share Posted December 13, 2024 I also believe that if you were to measure those bores as the features they are (cylinders and a cone) and evaluate them with Form you should see the same results. Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122618 Share on other sites More sharing options...
[To...] Posted December 13, 2024 Share Posted December 13, 2024 (edited) I find no difference in the result between the two methods. Profile of a FFS with best fit alignment or No Datum Reference Frame. However, I am surprised that I am not able to assign a freeform surface to a surface profile in the GD&T Engine_BETA. What am I missing? Edited December 13, 2024 Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122644 Share on other sites More sharing options...
[Cl...] Posted December 13, 2024 Share Posted December 13, 2024 Yep. I created a quick program and found no difference between the two evaluations. Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122648 Share on other sites More sharing options...
[I...] Posted December 16, 2024 Share Posted December 16, 2024 (edited) what is the meaning of these symbols?: Edited December 16, 2024 Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122706 Share on other sites More sharing options...
[Ma...] Posted December 16, 2024 Share Posted December 16, 2024 Please sign in to view this quote. Probably customer notes aka surface finish, hardness and so on. Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122750 Share on other sites More sharing options...
[ni...] Posted December 17, 2024 Share Posted December 17, 2024 (edited) Martin Jansky maybe, critical caracteristic Edited December 17, 2024 Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122762 Share on other sites More sharing options...
[Da...] Posted December 17, 2024 Share Posted December 17, 2024 Please sign in to view this quote. I think they are find numbers (from a parts list) for some assembly. Example: an insert that gets pressed into the cylinders. Link to comment https://qualityforum.zeiss.com/topic/21508-profiles-of-a-bore/#findComment-122780 Share on other sites More sharing options...
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