Dimensional Measuring Interface
Standard
Standard Improvement Request
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SIR No. 97-67 DMIS Release 3.0 SIR Type Enhancement Severity Prevents Programming Status Resolved Date Submitted August 15 1997 Date Validated August 15 1997 Date In Process Date Referred Date Vote Pending Date Closed January 15 1999 Action No Action Submitted By Thomas Kramer NIST Room B-124, Bldg. 220 Gaithersburg MD 20899 USA Phone: (301)975-3518 Fax: (301)990-9866 kramer@cme.nist.gov |
Problem Topic
OBTAIN: Change values of a FA
Problem Description
OBTAIN allows one to set the value of a variable to a specific
parameter of a feature. The reverse capability, setting the value of a
specific parameter of a feature, would be very useful. If the capability
were available, it would be straightforward to define a feature measurement
algorithm in DMIS. Without the capability, writing measurement algorithms
in DMIS is difficult.
References
None
Related SIRs
None
Suggested Resolution
Define a new major DMIS word which provides the capability described above.
A name that might be used is "SETPAR".
Support Documentation
None
Resolution
Warning!!
The following statement is only a resolution to a Standard Improvement Request (SIR) and is NOT part of the current DMIS standard, nor is it guaranteed to become part of the next revision of the DMIS standard even if voted and accepted by the DMIS National Standards Committee. This resolution is tentative because it may not be incorporated into the next version of the standard, it could be changed prior to the next release, or it could be changed as the result of the "public review and comment" period required for the next version of the standard. If you choose to use this tentative resolution, you do so at your own risk since at this time it is not part of the DMIS standard.
Rejected, the DME implementation can provide mechanism for passing and returning an implementation-specific set of macro parameters in order to provide an EXTERN,DMIS routine with the ability to calculate a feature actual. In this case, the DME would be responsible for creating the feature actual from the parameters returned by the called macro.
Attachments
None
Notes
Added by Mike Holloway, hkm@ornl.gov on 7/31/1998
I don't see the need to set values in a feature actual to acomplish what is desired. It seems that what is wanted is to be able to fix one or more paramters of a feature to allow for different types of fitting. This can be done in some CMM systems. Maybe an addition to GEOALG would be more appropriate. We probably need to consult with the submitter to find out what is really wanted.
Added by Enhancements subcommittee, enhancements.dnsc@dmisstandard.com on 1/14/1999
The DME implementation can provide mechanism for passing and returning an implementation-specific set of macro parameters in order to provide an EXTERN,DMIS routine with the ability to calculate a feature actual. In this case, the DME would be responsible for creating the feature actual from the parameters returned by the called macro.