I'm using LR 6 and printing on an Epson R2880. When I print on rolls several inches of my image are cut off. I have the paper size set to three inches over the image size I want and the cell in LR set to exactly the size I want. So tried to print 12x14 and got 12x12.5, tried to print 12x22 and got 12x18.5. The image looks perfect in the LR print window. What hidden setting am I missing? Working on a Mac OS X.
It could be possible that some margins are set within Lightroom Print Settings under Layout panel.
Also, you might want to try printing to a jpeg file to see if you are able to get the correct dimensions in the output.
All margins are set at 0 and when I print to jpeg the image looks perfect
Would suggest you to make sure that the printer drivers should be upto date.
Is it printing fine from other non-Adobe programs?