Is scan resolution different for flatbed vs Auto Doc Feeder? What resolution for each?
I heard some printers claim 1200 dpi scanning, but if you use the ADF then you only get 300 dpi. Is that true for this WF7620? What resolution do you get for the flatbed scanner? What resolution do you get for the Automatic Document Feeder? This question is for scanning, not for printing.
Unless you using it for forms and documents, I don't recommend using the ADF. It does use a fixed resolution and, at least on mine, tends to leave scan streaks in the direction of the feed.
I use mine for art mostly and use the bed to avoid the streaks, and the computer's Epson scan interface to get greater control over the scan settings (resolution, levels, saturations, etc)