We use a 1400, and that looks to me like it's running out of ink, at least that what it looks like when it happens here. I'm assuming you have checked that. Are you running all six carts? You can run from any one of the carts individually, it's in your AccuRIP set. It may solve your problem. You would also increase the droplet size a little if you go that route. Charlie Facini or anyone at AccuRIP can help you with that, or you can try looking it up on their Knowledgebase...
Steve