[Sc...] Posted January 28, 2021 Share Posted January 28, 2021 How do I plug the Ø.003max in the position characteristics ? See drawing attached. Can you show me the screen shot of the position to fill out? Is 3dline better than step cylinders to construct all diameters features? Step Cylinder kind of scare me to use it.3 COAXIAL FEATURES.png Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/ Share on other sites More sharing options...
[Ri...] Posted January 28, 2021 Share Posted January 28, 2021 I would try the Step Cylinder first. It will still allow MMC/LMC, the 3d will lose that. Also, there will be slight differences in the calculation itself. Measure both Cylinders as individual features, create a Step Cylinder, recall feature points. Bam. Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/#findComment-69990 Share on other sites More sharing options...
[Sc...] Posted January 28, 2021 Author Share Posted January 28, 2021 Where I put tolerance .003 on the position characteristic? Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/#findComment-69992 Share on other sites More sharing options...
[Ri...] Posted January 28, 2021 Share Posted January 28, 2021 I believe those are two different evaluations, which don't really make sense to me. My assumption would be that they want one Position of 0.001@MMC, but with a maximum deviation of 0.003. I don't know why they don't just make 0.003 the tolerance, and be done with it. Engineers do whatever they want. Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/#findComment-69994 Share on other sites More sharing options...
[Sc...] Posted January 28, 2021 Author Share Posted January 28, 2021 Please sign in to view this quote. I do agreed with you Richard. Easy to type on drawing but don't want to explain to inspectors how to measure. Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/#findComment-69996 Share on other sites More sharing options...
[Ke...] Posted January 28, 2021 Share Posted January 28, 2021 Please sign in to view this quote. My guess is that they want to make sure that "extra" bonus is not given, if the diameter is over spec. Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/#findComment-69998 Share on other sites More sharing options...
[Je...] Posted January 28, 2021 Share Posted January 28, 2021 Please sign in to view this quote. - - - I agree with you, Kevin, and I agree with Richard. To give the engineer the benefit of the doubt, I would guess his/her intention is to maximize manufacturability. Perhaps something like this: "Yes, we can provide the production team with bonus tolerance so more parts are accepted, so let's apply a .001@MMC characteristic, but we have to make sure the part fulfills its functional requirement when bonus is unavailable, so I'm going to specify this by adding a .003 MAX characteristic." However, the MAX specification is unnecessary and implied. Also, GD&T Rule #1 may already cover this. I guess he really wanted to emphasize the position requirement when bonus is unavailable. Jeff Frodermann Windings, Inc. New Ulm, Minnesota - - - Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/#findComment-70000 Share on other sites More sharing options...
[Ri...] Posted January 28, 2021 Share Posted January 28, 2021 Would make functional testing difficult then. Link to comment https://qualityforum.zeiss.com/topic/13646-coaxial-feture-position/#findComment-70002 Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in