CAD model verification

What we do to satisfy that requirement is to create an iges file using PC-DMIS. The iges file contains all of the features measured on the CAD. The iges file is created with all of the features at nominal, that is, not from a "measured" program, but from a program that has been run offline so that all of the points, circles, etc are in the nominal condition.

Then I merge that iges file into the original CAD file using the native software (in our case that is almost always Catia). Then I report with Catia how far from "perfect" a few of the points are. I usually just grab a couple in each axis.

This has satisfied the auditor.

We are switching to a software solution using a cad validator that I think is called Kubotek. This works much faster and checks every probed feature almost instantly and reports how far off the points are from the original surfaces. We have a demo version that we are testing now and yesterday we checked a program that has over 800 points. The worst point we found was off by .0005". Most were less than .0001". Our customer requirement is that the translation can have no errors greater than .001"

To answer your question about PC-DMIS doing this validation: I am not sure about the latest versions 2011 and 2012, but all of the versions before that did not have this capability.

What we do to satisfy that requirement is to create an iges file using PC-DMIS. The iges file contains all of the features measured on the CAD. The iges file is created with all of the features at nominal, that is, not from a "measured" program, but from a program that has been run offline so that all of the points, circles, etc are in the nominal condition.

Then I merge that iges file into the original CAD file using the native software (in our case that is almost always Catia). Then I report with Catia how far from "perfect" a few of the points are. I usually just grab a couple in each axis.

This has satisfied the auditor.

We are switching to a software solution using a cad validator that I think is called Kubotek. This works much faster and checks every probed feature almost instantly and reports how far off the points are from the original surfaces. We have a demo version that we are testing now and yesterday we checked a program that has over 800 points. The worst point we found was off by .0005". Most were less than .0001". Our customer requirement is that the translation can have no errors greater than .001"

To answer your question about PC-DMIS doing this validation: I am not sure about the latest versions 2011 and 2012, but all of the versions before that did not have this capability.