Profile of a Line Report Out

Colleagues,
I'm discussing a miscorrelation with a supplier and wanted to be clear on the CMM report out for a profile of a line. On the CMM dimensional report;

Do I select the R 6.438 dimension and report it out as a nominal with a +/- 0.015?
OR
Do I select the Profile of a line and select the R 6.438 feature and report it out as a profile of a line with a +/ 0.015?

I understand a basic number does not have a tolerance and the control fame is the tolerance. I just want to be clear on how to report it out from PC-Dmis. thanks for your time!
​​

Your callout, balloon Item 49, is for an all-around line profile (the profile of the entire set of outside surfaces around the perimeter of that view). Since there is only one datum, the datum reference frame is not fully constrained. There will be Rotation and Translation allowed relative to Datum A (assuming A is a plane). You will need to include all the surfaces around the outside perimeter of the part in one Line Profile dimension command. That will allow the measured features to be best fit as a set. Reporting the profile of each feature separately will give you a false results - The reported values will be better than the correct values.

If you are reporting in legacy mode, construct a Feature Set from all the features that are measured on the perimeter of that part. Then, while in an alignment that is leveled to Datum A, create a Line Profile dimension of that Feature Set with Form only selected. For your specific callout the settings would like like this below, assuming your current alignment has Z+ leveled to Datum A.

A quick note on this: Most Profile callouts (with a fully constrained datum reference frame) require you to align to all the datums and then select 'Form and location' under the controls option. Then cut the tolerance in half and report half as positive and half as negative (a .030 tolerance would have +.015/-.015). However, with your line profile callout, which is only constrained to one datum, you will use Form only, which allows the data to be Best fit.

​ If you are reporting in Xact Measure or GeoTol mode, construct a Feature Set from all the features that are measured on the perimeter of that part. Then, just create a Line Profile dimension, select the feature set, and select Datum A in the datum reference frame. The software does all the work of figuring out the positive and negative tolerances, the workplane to use, the type of fitting that is allowed, and you don't have to align to the datums.

​​

Colleagues,
I'm discussing a miscorrelation with a supplier and wanted to be clear on the CMM report out for a profile of a line. On the CMM dimensional report;

Do I select the R 6.438 dimension and report it out as a nominal with a +/- 0.015?
OR
Do I select the Profile of a line and select the R 6.438 feature and report it out as a profile of a line with a +/ 0.015?

I understand a basic number does not have a tolerance and the control fame is the tolerance. I just want to be clear on how to report it out from PC-Dmis. thanks for your time!
​​

Your callout, balloon Item 49, is for an all-around line profile (the profile of the entire set of outside surfaces around the perimeter of that view). Since there is only one datum, the datum reference frame is not fully constrained. There will be Rotation and Translation allowed relative to Datum A (assuming A is a plane). You will need to include all the surfaces around the outside perimeter of the part in one Line Profile dimension command. That will allow the measured features to be best fit as a set. Reporting the profile of each feature separately will give you a false results - The reported values will be better than the correct values.

If you are reporting in legacy mode, construct a Feature Set from all the features that are measured on the perimeter of that part. Then, while in an alignment that is leveled to Datum A, create a Line Profile dimension of that Feature Set with Form only selected. For your specific callout the settings would like like this below, assuming your current alignment has Z+ leveled to Datum A.

A quick note on this: Most Profile callouts (with a fully constrained datum reference frame) require you to align to all the datums and then select 'Form and location' under the controls option. Then cut the tolerance in half and report half as positive and half as negative (a .030 tolerance would have +.015/-.015). However, with your line profile callout, which is only constrained to one datum, you will use Form only, which allows the data to be Best fit.

​ If you are reporting in Xact Measure or GeoTol mode, construct a Feature Set from all the features that are measured on the perimeter of that part. Then, just create a Line Profile dimension, select the feature set, and select Datum A in the datum reference frame. The software does all the work of figuring out the positive and negative tolerances, the workplane to use, the type of fitting that is allowed, and you don't have to align to the datums.

​​