I'm having similar problems attempting to print from Illustrator CC to an HP Z6200. I have 36" media. so, if I attempt to print a piece that is 72"x36" I would just set it to print 'short edge first' and everything would be fine. However, with CC it keeps rotating the job and the printer automatically scales it to fit the paper (36"x18"). This is really annoying, hopefully there is a fix for this soon
Don't hold your breath waiting for HP to solve this. They blaim Adobe for wanting to control a device that is not theirs. My problem is about to be solved by HP buying back my printer! Have you tried saving your file as a PDF and using HP instant printing Pro? You might have to dig out a few different versions of this masterpiece but it will print to your printer placing your image where it should be. I'm serious in saying I will never own another product with HP as it's origine.They offer great support and give none. They promote the "Z" series as suitable for photographers but most of the drivers and Windows 8.1 won't work with any Adobe 'cc' program and its not like these came out yesterday, is it?
Take some screen videos of what you do and what happens. Send them to HP support telling then your next destination is the board of management if they don't get serious about a problem that shouldn't exist and they'll pretty quickly offer to buy it back off you. Get an Epson with the refund money. You'll never regret the effort you went to to get one. HP beautiful prints crap interface. Did you knowc the print driver 'lab' is in Spain and they don't have any internet access? Crazy level of security or do they just not trust themselves with technology?
Well... I fixed the problem a little differently. I got a 100% + costs refund from HP themselves and bought an Epson! Boy, was that ever the right decision to make. I've had not a single problem with the Epson where the HP gave me a litany of endless drama. I can't understand why a printer maker needs to create faulty and bug ridden software that wants to take control over both Windows and Photoshop and then they try and blame everyone except themselves.
The HP Z5400 postscript printer proved one important thing to me... You only ever get what you pay for. I run canvas about4 to 5 hours a day with the Epson. I had to stay at work past 8 hours a day just to get the same amount of work out of the HP. For speed, I've never had anything faster than a Canon 8100 but the hidden costs of ownership are horrendous. The HP was the cheapest printer I've had and the slowest. The Epson is economical to run, performs at a reasonable speed and doesn't have any hidden costs.
After 5 months of hassling HP to get the "next day, on-site" support I paid $1200 extra for and never got, I can guarantee you I'll never , ever own another Hewlett Packard product again. I had to go to the Asian Pacific head off to get anyone who'd listen to me. The Australians wanted me to sign a form I'd keep my mouth shut and sacrifice nearly a grand I'd put into it before talking about a refund. Then I discovered they'd been fined 3 MILLION bucks by the competition and consumer watch dog in Australia over telling someone who bought a $200 printer to go take a walk when it dropped its guts a few weeks after buying it. That mob is pure poison for consumers.
we found a workaround for for Adobe sending "scale to fit" for no good reason:
in the print dialog, under setup, use "custom" paper size instead of "defined by driver".
Sadly I am running into a similiar issue. I try to print from Photoshop cc 2017 to HP Z5400 (everything updated, reinstalled, etc.) and Photoshop is deciding to rezie my print. In my case it is scaling the final print up. For instance look at the images I am providing and keep in mind that scale to fit and all of that is turned off everywhere I could possibly find it. I know it is a Photoshop to printer issue because if I save my Photoshop file as a PDF and print from acrobat it works fine. I understand the sane thing to reply back with is just print from Acrobat but why is this happening? The exact same file is printing differently depending on if it was printed from Acrobat as PDF or from Photoshop as PDF. Photoshop is rescaling every type of file. I thought I would show this example because it is obvious there is something going on when printing from Photoshop. Can someone please enlighten me as to why this is happening? I need to print from Photoshop but I can't because my prints are being rescaled?