Cmposite Position Basics

[[Er...]]

I have a print using a Compoosite Position call-out with the Basics for the second tier distances between 3 features instead of as a Circle. How do I get Calypso to use and report the Basics for the second part of the Composite Position?

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[[Ma...]]

Basic dimensions are not subject for reporting - it's for TP callout
In this case it would be pattern

[[Er...]]

In addition to our machinists using the actual values of basic dimensions for machine adjustments, we have many customers who require actual values of basic dimensions be reported as part of the position. Usually this can be accomplished with the "additional report" setting. I haven't been able to define a pattern to use that reports these basics between the features instead of from the center of the pattern with either polar or cartesian distances. I am looking for the particular setting that would display basics between the features as part of the pattern.

[[Wo...]]

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That's the problem for me too, I've got a couple customers requiring this. Would be nice to be able to create a characteristic extracting actual coordinate values from Position measurements.

[[Ma...]]

Then enable additional ( detailed ) report to see X,Y,Z values.

[[Wo...]]

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That's what I do, but then I can't do automatic imports to excel - I have to type them manually. If I could extract them as separate characteristic I could import them.

[[To...]]

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Technically, you are correct. However, if the customer requires the data, are you going to say no?

[[To...]]

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For the top tier, since you have a fully constrained DRF, you can do 3 position characteristics or 1 best fit bore pattern. For the lower tier, you need to use a best fit bore pattern, allowing translation and rotation. Personally, I would use best fit bore pattern for both due to the ability to create plots. I would un-tick the rotation and translation best fit options for the top tier.

[[Mi...]]

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Interesting that the additional printout doesn't export the coordinates for excel... We don't use the excel prinout period, I expect not many do.

Use a result Element to report the basics
In the Nominal put: getNominal("Position Name").coord1

if the formula put: getActual("Position Name").coord1

coord2, coord3, etc.

Note: If you use a BFBP the syntax becomes getActual("Position Name^1").coord1
And if that BFBP is set to polar this doesn't work and I don't know why.

Another option is create your BFBP as the control frame says, and then recall all your holes onto the new alignment that BFBP will have made, then just report the coordinates directly... lots more work, but it'll do it.

[[Ma...]]

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Well - i would understand for machining purposes, but often you can not place tolerance to positions due drawing ( like here )

I had an issue with QA - i did comparison of deformed part with machined model created from drawing without dimensions if it can be machined with non missing material. They always want graphical presentation - so I've used profile without tolerance ( due to different material surplus ) - i could not explain them why there can not be used tolerance 🤣

[[Je...]]

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Martin,

I appreciate your question. While not a direct answer, here is an outstanding video by GD&T Basics that explains the difference between Composite Position and Position with Multiple Single Segment Tolerances.



https://www.youtube.com/watch?v=IBb65qSpO_U

[[Wo...]]

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We don't use Excel Printout either. I wrote a VBA macro that imports results from table file into our first article report based on the characteristic name. For example balloon number 51 would have a corresponding characteristic named 51-Something and this way the macro knows what to import. I like it because its universal for every first article and every cmm plan and in a job shop it works great. But the with actuals of GDT the problem is that I can't change the name of the record to the same format.

Your suggestion to use formula with coord is great I will try to get that to work.

Thank you!