There is plenty of macros around that exports to DXF. I have never made one myself, so I thought I would give it a try this evening.
If you have not found any macro out there yet, you are welcome to try this one.
What you need to change is following variables.
SourceFolder = "C:\sourcefolder\" 'Folder from where the export will be done. SUB folders will BE included.
DestinationFolder = "C:\destinationfolder\" 'Do not forget that the string must end with \ (backslash)
sFilter = "_blank" 'Macro will only export the drawings with a match to this string
I would also recommend that you carefully compare the exported files so that you are confident and absolutely sure that the export was successful.
The macro will also create a log file in the destination folder. I would recommend that you read the log file in order to find out if it there was any errors or warnings seen from a SolidWorks API perspective.
Please provide feedback if you used the macro.
The add-in Batchprocess can also batch convert files, if you feel have a further look at the site. I just had a brief look at it and it feels like it has very good functions and settings.
There is a 50 days trial that you can use to evaluate the product. You could quite easy filter away the unwanted files by doing a manual search and just copy the ones with _blank in the file name before or after the batch run.
BatchDXF.zip 20.4 KB