[Sc...] Posted September 1, 2020 Share Posted September 1, 2020 Can someone explain what the X and Z value number coming from profile point list? Part is cylinder shape and sits Y axis. Basic OD is 4.202. Y value is irrelevant.Point list_.pdf Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/ Share on other sites More sharing options...
[Ri...] Posted September 1, 2020 Share Posted September 1, 2020 Profile is a direct comparison of nominal to actual points. The software is outputting the actual point, and showing you the deviation to nominal. Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77574 Share on other sites More sharing options...
[Sc...] Posted September 1, 2020 Author Share Posted September 1, 2020 Let’s talk about the report. On point 908, the actual Z measurement shows 2.0943 and the nominal Z shows 2.0921. I want to know where the software is getting the 2.0921 nominal from? Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77576 Share on other sites More sharing options...
[Ma...] Posted September 1, 2020 Share Posted September 1, 2020 Are you serious on your question? Can you use calc and simple pithagoras a2 + b2 = c2? Obviously it's not 0 in X axis so Z must be less than 2.101 https://en.wikipedia.org/wiki/Pythagorean_theorem Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77578 Share on other sites More sharing options...
[Sc...] Posted September 1, 2020 Author Share Posted September 1, 2020 Martin Jansky. My engineer is asking the question. I have to explain to him because the call out on print is surface profile. I guess using cylinder 180° path(2 circles) is a bad method to use for profile. Right? Is there an easier way to measure the profile with easy results to read? Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77580 Share on other sites More sharing options...
[To...] Posted September 1, 2020 Share Posted September 1, 2020 Please sign in to view this quote. Scott, the X and Z values come from the points created from each of the circle paths in your cylinder relative to Datum C. If you scroll through the points, you'll see 2 sets of Y values. It appears you've collected approximately 600 points for each circle path, but I'm a bit miffed because I am seeing 3 circle paths on the screenshot. Any chance you revised the strategy since you collected the point data? Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77582 Share on other sites More sharing options...
[To...] Posted September 1, 2020 Share Posted September 1, 2020 Please sign in to view this quote. Freeform Surfaces would be the best way to check this, in my opinion. Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77584 Share on other sites More sharing options...
[Ri...] Posted September 2, 2020 Share Posted September 2, 2020 Please sign in to view this quote. I think you will run into the same issue as far as what he is seeing. I don't turn on additional printout on a Profile because of having to explain to the people reading it what exactly they are looking at. I think the form plot for Curve and/or the CAD Presentation is just a much better way to show the error in a Profile. Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77586 Share on other sites More sharing options...
[Ma...] Posted September 2, 2020 Share Posted September 2, 2020 With all respect, give him GD&T training, or fire him. If he's checking your work, then he MUST know GD&T. If he make drawings -> he MUST know GD&T. Othervise is useless to describe every measurements. I would first start to displaying in CAD eval like cylinders - spheres are not much usefull. Play with cylinder radius and scale. You could display it like curve or it could be viewed like cylindricality with locked radius, but i didn't tried it. You can even draw simple drawing how is "profile" calculated. Sorry, I am little upset. We have some people who don't fully understands even basics and they are my co-workes. They just apply what's in drawing regardless of part function / purpose. Link to comment https://qualityforum.zeiss.com/topic/14704-point-list/#findComment-77588 Share on other sites More sharing options...
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