I have just set up a new R2000. Most of the time it is great but it will then start to feed sheets with no attempt to print. The paper light is on on the printer. If I put the sheet in again, the same thing happens. Powering on and off and restarting the Mac doesn't fix it. After cancelling jobs, nozzle checks, starting another job, it will sort itself out and then print again.
I'm sure that there is a pattern in there somewhere, I just haven't found it yet. I am hoping that it has been seen and solved before. I am using Print Tool 1.1.0, QTR 2.7.5 and OS X 10.9.5.