New Math Data, Existing Program, Reverse Engineering

[dfiola66]

I'm sure some of you experience this:

We have a math data file drawn for a part. The part in this case is gospel. I write a program to check part and give variances to cad dept. They change math model. I re-import NEW cad data but now, original inspection points are useless (200+ points)

Is there a way (re-measure function??) to reset the point nominals to the new math data WITHOUT re-picking each point to redo each nominal and ijk?

[Matthew D. Hoedeman]

In theory there is, go to F5 set up and find the box in the scroll down menu that says FIND NOMS ON EXECUTION. Then, in offline mode, mark all the points (except for the alignment points, if any) and execute it in offline mode. THEN, in theory, it will find all the new nominals from the new data. AS soon as you are done with this, UNMARK the find-noms and go from there.

HOWEVER, in the one instance when I tried this, it didn't work for crap. It may be due to the fact that I had VERY complex data and it couldn't find the correct surface to use, but in a couple of the points I know for a fact that it didn't even come close to finding the closest surface. It may have been the data file I was using or it may have been Pcdmis. All I can say is give it a try.

[JamesMannes]

I would have to agree with Matt. I have not had much luck with the Find Nominals on execution. But, I have only tried 2 or 3 times (same part different models).

[Andrew Gardner]

Same here, no luck with Find Noms. I've found it easier, and faster in the long run, to just F9 each individual point, and re-find the vector.

[Matthew D. Hoedeman]

Same here, no luck with Find Noms. I've found it easier, and faster in the long run, to just F9 each individual point, and re-find the vector.

Well, not just find the vector, click on FIND NOMS and it will get BOTH the new nominals and the vector, ya gotta have both.

[jon_dav_uk]

Sounds like your in a similar boat to me.

We have a family of parts which vary in size only. I have a standard program wrote which measures these parts. For each new part, I manually import the CAD data and F9 each point.

Currently working on the following

Parametric CAD model for parts in ProE which contain all the points I measure in PC Dmis. Each point parametrically linked to features.
Export points from Pro E as a standard text file containing X,Y,Z,I,J,K

I have created a PC Dmis program which reads in this text file and assigns each line of data to an array

All the points in the program now use this array to set the theo and target values

Point the program at a new text file and everything just updates. Have not sussed out reading scans in yet but working on it

If this is a regular thing for you might be worth looking into