Thanks,
To expand, we have 7 machines running the spec below, 2 printers churning out 40-50 prints a day on average. definitely cued more than 3 at a time. Usually plotters are ok, however every now and again...say once every 2 hours, they print out a completely black print or print out black boxes where the text should be or change the colours or print double layers of text so you can't read the text.