Could somone please view my method for calculating the following is correct?

[[Ra...]]

1.Please view the image that is attached.

2. As you see I'm working with a chimney that is varying in diameter from top to bottom. I have 3 dia. call-outs that are to be taken @ certain depth from the top of the chimney.

3.I Pretty much constructed space points as shown on each flange @ the appropriate depth from chimney top.
Then I created a theoretical circle , which I think i used "reference feature points". That circle is called by a characteristic diameter.

Is this method correct, could I do it any other way ?

Im having a issue where depth 1 from top plane is good, depth 2 and 3 are coming out of spec.

Any information would be appreciated.

1.png

[[Ro...]]

If the feature is a cone that all 3 diameters are on you can use Construction/Cone Calculations and either input a diameter and find the location of that diameter on the cone relative to an alignment, or input a location and find the diameter at that location. If it's 3 separate cones then you could just repeat that process with each cone. Hopefully I am understanding correctly.

[[Ow...]]

I wouldn't use space points unless I had too.
If the points are equally spaced and If you have a model, just select to define a circle on a cylinder and select the face at the depth you want it to check, do for the 3 depths needed and you can adjust it to the correct depth in the circle feature. If you don't have a model, just take points where needed until it develops a circle with feature recognition.
In the circle feature, open the strategy select single points, put how many points are needed (how many teeth you want to check) and then you might need to adjust the start angle to rotate the point to where they are in the middle of the teeth.

[[Ra...]]

Robert , the points are taken on the inside as shown in the picture. I think you may be thinking on the outer diameter area.

Owen, I will try your method tomorrow . I hope it produces better results. Thank you soo much sir ! When you state how many points you want Own will it automatically determine the center of the flange like with the "x" as shown in your image.

[[No...]]

Now are the diameters measured on a cone or a cylinder? I still don't know for sure from reading all the above 😃

Because when it's on a cone, you need to use "circle on cone" to properly consider the cone angle. Otherwise the tip radius correction may be wrong. And if ultra-high accuracy is required, you should measure the cone angle beforehand and insert it in the nominal angle field in the circle (or use a formula).

[[Ra...]]

The area where i have to touch are coming up has Torus. That would be 9 Torus around the diameter where i have to touch.

If i construct a cone and touch at the right areas. I receive a error saying "error during iteration of the feature calculation. Any help would be nice.

[[Ry...]]

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Ravi,

Based on your above response, and what I can see for features in your attached picture. It appears you're dealing with multiple geometries. I see a cylinder radiusing into a cone which then radius' back into a cylinder. But without seeing a section view/clipping plane of one of the splines, we are only guessing.

I agree with what Owen mentioned earlier. Create your circles either from a cylinder, or manually create them with the nominal diameter and at the specified depth. Then create the strategy Owen mentioned using single points and you are done.

The other thought I just had, was maybe your drawing is calling out intersecting diameters using the cylinder and cones. In this case, you just need to measure each cylinder and each cone, and create a intersection using the shell of each feature.

If none of the above suggestions are working, then we will need some more information such as the drawing callout for those features, or a section view.

HTH
Ryan

[[Ra...]]

Solution :
1.Created 1 pt. on the flange @ center and correct z origin for first level.
2.Used that point and created a "pattern" off it @ 40 Degree rotation and setting it to 9 sections.
3.That created 1 point on each flange at the center and the correct z height. (9 total)
4.Recalled points into a circle.
5.Same method for the rest of the plane.

Produced Good results.

I have one question. If you are doing a scan path on the inside . How can you avoid the crevices so your probe doesn't get stuck or go into it when its rotating around to collect points.

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[[Ry...]]

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Ravi,

What you did will work, however, it was a lot of extra work.
Instead you could have created a circle, at the nominal diameter and correct depth, and using single point strategy (9 pts) as Owen mentioned above, accomplishing the same results with less effort.

And by choosing single points, the probe does not scan, therefore will avoid the crevices.

HTH