I had the opportunity to work on a Xerox DocuMate 3220 over the years and here are some things that you need to keep in mind.
Jam on the Automatic Document Feeder
It is possible to have a jam on the Automatic Document Feeder (ADF) and it is usually caused by foreign material. The first time I supported a jam on the ADF was due to hole-punch dots that fell in from the overhead shelf which had the Xerox DocuMate 3220 underneath. The second (and last) time was due to a paperclip falling out of the cabinet from the overhead shelf. As the user was not aware of the cause of the first incident, I told them in detail about the first and second incidents and encourage them to relocate the scanner (and paper shredder) which they happily agreed to. A year has passed and I have not been called back for any ADF-related issues.
Scanning to PDF
When scanning, you will have to scan to a .BMP file by default but there is a trick to getting it to scan to a .PDF file. First, install Adobe Acrobat and use the Create to PDF function on the menu. The Adobe Acrobat software program will talk to your scanner and will then have all your pages scanned into one easy-to-share PDF file. If they are separate .PDF files, you can also use the Adobe Acrobat software program to merge all the .PDF files into one which makes it convenient for printing and sharing. While sharing your documents, it is a good idea to translate PDF files into a language that the recipient can comprehend.