Pattern Help

[[Mi...]]

So.... I have this tube that I scan the OD with 2 separate 180 scans. I use # 3 and 5 tips. One on each side of the part as in the screenshot. I made the scans a pattern since they wanted them 0.5 apart as you can see.

I am now trying to recall each 2 180 scans into a separate circle so that they can see the diameter at every .5mm. I will have 40 OD circles in this case. If that makes sense. I want 40 OD's using combining the scans

I cant get this to work. In a nutshe. I need each 180 deg scan to merge into 1 circle. I do not know how to do this with the pattern feature. I he clicked so many boxes my hand hurts LOL

[[No...]]

Why don't you combine the two halves at scanning time already, i.e. make a strategy that contains both.
I know, lots of CMM merry-go-round if you do it that way, but you wouldn't need any recalls.

I haven't done this in a long time, but I think it should also be possible with recalls. You'll need another pattern for the recalling feature, serving as a loop replacement. It must have the same number of elements but no offset.

[[Me...]]

Mike....

That looks like a shock body! AND I see they still haven't purchased you a rotary table yet?

[[Ke...]]

Open a new circle feature and select "Recall Feature Points" under NOMINAL DEFINITION, then click on the box next to "Show All Features In Patterns/Loops".
Now you can select each patterned circle as an individual feature.

[[Mi...]]

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Hahah no Rotab yet. Soon. Yeah no shock. Its all of 50m Diam. little small hahah

[[Mi...]]

Ill give it a shot for sure...
😠 😠 😠

[[Jo...]]

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Recall all points into a cylinder, then section it with theoretical planes at desired intervals. Use Intersection of plane and cylinder to create circles. Then report diameter, min, max, concentricity, position, roundness etc.. This also would allow freedom of scan paths, even using lines.. Formulas and paintbrush should make quick work of this.

[[Mi...]]

Guess I did not think of that one John...

[[Ia...]]

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Would there be an easy way to make all of the theoretical planes?

[[Jo...]]

Sure. Select Theoretical Plane, then go to 1D linear pattern. Select offset distance, number of times, and direction. 40 theo planes at once. Then select Intersection of Cylinder as first feature, Plane as second feature. It will create ALL 40 intersections and report their diameters as pattern once you run report, even though it shows as ONE characteristic .

[[Mi...]]

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Is this a good idea? If you do it that way, won't they all report essentially the same diameter? It seems like you're losing a lot of information when you best-fit it to a cylinder, like if there's taper, or waviness along the cylinder axis, etc.

Or maybe I just don't understand how Calypso would perform the calculations you're describing.

[[Jo...]]

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If the max or min is of interest you can report that too using MAX feature ,Min feature, AVG feature. It stops a lot of page flipping.

[[Jo...]]

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Good point, but not sure on that. It will construct a cylinder with axis and diameter but the data is still there. If you plot cylindricity it still reflects the deviations from real data. Guess we'll have to see. I don't have any data in mine since I just created a THEO cylinder without measuring a part.

[[Mi...]]

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If I understand Calypso correctly, taper or waviness in the part would show up as bad form on the cylinder feature, but the intersections themselves would be calculated assuming the cylinder has perfect form. I haven't exactly tried this myself either, though.

[[Jo...]]

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I bet you are correct. I went to recall feature points and the intersections are not in the list, only under the Recall feature. I'd like to see some real data and see how roundness shows for the individual circles as well.