We have a T120 where I work and unfortunately are having a lot of issues printing to the correct size. We use this printer for large scale projects such as grocery signage and menus, the folks before us were having little issue so would love to know if/what I may be doing wrong!
I use Adobe Acrobat and set the canvas to be the exact size as my document both in Acrobat as well as in the printer settings, I have also tried adjusting these settings to be the same width as the T120 roll. With Acrobat I have tried printing to fit, scale to %100, print as image as well as various portrait/landscape modes both in the poster setting as well as the "size" setting. All of the user manuals I have seen this should be the correct way to go with no issue and the print settings on my Mac are set to use a roll with the premium gloss paper.
With all of this and more the outcomes are varied. Sometimes the document will print just fine or in most cases will only print a section of the image, not print to scale, or won't print the image correctly at all so we haven't found a "tried and true" solution.
Image attached of what is supposed to be a "22" x "48" document with a giant fork and this is what we got.