[Ja...] Posted October 30, 2019 Share Posted October 30, 2019 I have a part as shown in the image attached. I am tasked with measuring that radius but the center is offset. I am told that this is a sphere, Calypso says it is a torus. If I measure it as a torus and report the second radius, the results are often slightly large. Measuring as a sphere and reporting radius, results are small. What shape is this and what is the best way to report that size? Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/ Share on other sites More sharing options...
[An...] Posted October 30, 2019 Share Posted October 30, 2019 Measure the outer diameter or inner cylinder and set it as the primary alignment. Then measure the shape as a sphere and you will get the values you are looking for. You can convert the diameter of the sphere into a radius in a formula Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97394 Share on other sites More sharing options...
[Mi...] Posted October 30, 2019 Share Posted October 30, 2019 It is a Torus, but it looks like the "major" diameter is actually smaller than the "minor" one, which is unusual. A sphere, though, is the special case of a torus where the two are equal. Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97396 Share on other sites More sharing options...
[Gr...] Posted October 30, 2019 Share Posted October 30, 2019 Calypso will recognize this as a Taurus. To get the radius you need I would make a circle under creating features under CAD pull down. Open the section pull which is where you define the sectioning plane. You can manipulate size by grabbing corners with mouse then hit section. A yellow line shows the places the features are cut After you do this go to creation and with mouse click on the yellow line that represents feature you need. It will turn purple. Un-click Full circle then click the circle icon. A circle will be created under features you can now open up the circle and edit your strategy and evaluation Hope this is helpful and not too long winded Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97398 Share on other sites More sharing options...
[Ja...] Posted October 30, 2019 Author Share Posted October 30, 2019 Please sign in to view this quote. It doesn't give me the correct results as a sphere. Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97400 Share on other sites More sharing options...
[Is...] Posted October 30, 2019 Share Posted October 30, 2019 If I was the designer wouldn't request a radius measuring there (Line Profile is better).. the measuring will have a very big uncertainty anyway... you have some tools to find the value that you are looking for here: Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97402 Share on other sites More sharing options...
[An...] Posted October 30, 2019 Share Posted October 30, 2019 It's not a donut,it's a football. Do a radius measurement in several sections. (profile) Not half circle diameter. 36 times rotational pattern for instance. (means each 10°)Contribution_30_10_2019_b.pdf Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97404 Share on other sites More sharing options...
[No...] Posted October 30, 2019 Share Posted October 30, 2019 By the way, you can't trust Calypso's identification of CAD geometry, because Calypso always approximates. If you need to know the real geometry type of a CAD patch and have no CAD system available, you need at least some kind of CAD viewer that allows to turn approximation off. Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97406 Share on other sites More sharing options...
[Ja...] Posted October 30, 2019 Author Share Posted October 30, 2019 Gregory got it. I overlooked the Creating Features menu. I tried creating curves and then recalling into circles. I didn't realize that through a Section I can simply define a circle. As far as offline is concerned, this is looking much better. Will update when I run it online. Thanks Norbert for letting me know that Calypso isn't always spot on. Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97408 Share on other sites More sharing options...
[SH...] Posted October 30, 2019 Share Posted October 30, 2019 Please sign in to view this quote. It should be a Torus, sphere radius should be marked as SR not symbol R. Using curved tracing you can easily find the radius, I don't think this is much complicated.... Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97410 Share on other sites More sharing options...
[Ja...] Posted October 30, 2019 Author Share Posted October 30, 2019 Bringing it online with circular section scans gives me more realistic answers. Thanks again everybody. Link to comment https://qualityforum.zeiss.com/topic/17376-is-this-a-torus/#findComment-97412 Share on other sites More sharing options...
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