# GD&T in SAP (Geometrical Dimensioning and Tolerancing for Results Recording)

GD&T in SAP

Being in the, Aerospace and Defense, Manufacturing Industry, Customers and Colleagues have enticed me with a question I could not quite answer; “Can you get ‘GD&T’ (or Geometric Dimensioning and Tolerancing) into SAP Results Recording?” After days of trial and error, finally I have an answer, an outstanding “YES!!!”

I hope this instruction finds its way to manufactures in need…

Here is how to get GD&T out of SAP;

Starting within an Operation, whether it is in a Routing or an Inspection Plan, create the Basic dimensions and then create the GD&T control frame features. Once complete, test your solution and provide to the customer.

For this example, the Basics are ballooned features 1, 2, 4 & 5 and the Control Frame ballooned features 3 & 6.

1. Create the first Basic Characteristic; Set as Quantitative and maintain the Control Indicators.

(“Defects Recording” not activated since Basic dimensions are theoretically exact and cannot be rejected)

1. Enter the Target value, UoM, and Decimal places.
2. Enter Sample Procedure, UoM and Base Qty.
3. Repeat 1-3 for other basic dimension.
4. Create the Control Frame Characteristic; Set as Quantitative and maintain the Control Indicators.

(Select “Cal. Charac.” to enable GD&T Calculations)

1. Enter the Target value, UoM, and Decimal places.
2. Calculate the Control Frame as a Formula. Use the Hot Key to view a list of variable formula parameters to use.
• On paper this calculation would look like ~ 2 √ ((Deviation of first Basic)2+(Deviation of second Basic)2)
• In SAP this calculation would look like = 2*(SQRT(((C70010-A00010)**2)+((C70020-A00020)**2)))
• Formula interpreter: True Position =2*(SQRT((( ppnnnn – ppnnnn)**2)+((ppnnnn-ppnnnn)**2)))

The variable ‘pp’ defines the formula parameter and ‘nnnn’ represents the characteristic from which the value of the formula parameter is taken.
• “C7” = Target value of characteristic, “A0”= Measured value for single unit, “SQRT”= √, **= exponent

1. Maintain the Defect Codes
2. Enter Sample Procedure, UoM and Base Qty.
3. Save and create an Inspection Lot for testing.
4. Enter Basic Dimensions and have SAP Valuate
5. Once valuated select the GD&T characteristic and calculate it by clicking the “Evaluate Formula” icon.
6. Valuate and Save. SAP has calculated GD&T!!!
• SAP valuates per the parameters and accepts or rejects the feature. The table below was used to ensure it was being calculated properly with different results, as well as, requirements.

Record the Usage Decision when ready.

Thank You,

Dave Katz

Lessons Learned

I recommend creating a “Preset Control Indicator” for Basic dimensions.

For Basic dimensions, activate “Check target value” control indicator to ensure the target values are not skipped when setting up.

Set the Basics and their applicable GD&T characteristics with the same Sampling procedure, if used.  I prefer to set “Required char.”, “Scope fixed”, as well as “Record measured vals” to ensure all results are captured and the GD&T will be able to be calculated.

The first result correlates with each first result. The second result correlates with the second of each and so on. If a Basic result is missed, the GD&T characteristic will not calculate. (Easier to visualize when inspecting serialized material)

Practice makes perfect!!!

Feel free to reach out to me if you have any questions concerns.
Thanks again,

Dave Katz

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Hi Jeff, very good posting.

I have a very basic question.

In the short text for insp char., I dont know how to find and type the different symbols used. I can see you are using some of them in your item 30.  I have found some, like the following.

| Ø 0.05 Ⓜ | B Ⓜ

But are not sure how to find others.

Do you know?

regards Johan Blomstrand

Hi,

I am also having same question. How to copy that symbols into text field.

Thanks

Rajesh V

Hi,

We are also looking for the same.

Dave : Could you please help us with how to type those symbols in the inspection short text.

Regards,

Sandeep

Dave Katz
Blog Post Author

Look into SAP Unicode characters.

Hi Dave,

I am looking for the Solution how to assign the GD&T Symbols in Inspection reports. Is there a way where we can assign the GD&T symbols in Master Inspection Character Master and it should populate in Result recording screen in Inspection lot or Inspection Report. This is one of the Mandatory requirement for Aero Business to print the GD&T in the Inspection Reports. How sap can handle this requirements. Kindly give your inputs on the same.

Regards,

Pugazhendi S

Dave Katz
Blog Post Author

Look into SAP Unicode characters.