Solved! Go to Solution.
It is very important to choose HPGL2 driver during installation and nog PCL3
Then after the installatie choose "roll" as input type and the proble is solved.
we bought ourr HP Designjet t520 plotter at plotterwinkel.nl a company in my country. they sell a lot of T520's and made their own installation instructions. They are only in dutch but the most important thing is choose HPGL2.
Inventor 2015 (on Win 8.1) also has problems with this printer.
Attaching two images to show the difference between 2014 (works) and 2015.
It seems like the text show up in different languages (mostly japanese), and the drop-downs have no content - except for presets which had my CAD2-preset, but it didn't read the paper size correctly!
Workaround at the moment is to export as PDF, and the print the PDF. But given the cost of the Product Design Suite, this REALLY should be fixed by Autodesk and HP...
Success!! I just had a notification from Windows Update that there were new updates, and one was a driver from HP for the T520 plotter. It's dated 15-01-2015, version 61.144.2523.100. I installed it, and the printer now works perfectly in AutoCAD.