The paper tray plays an important role for the DTF to keep the film in a horizontal position, preventing the film from bending, ink spreading. When the film ends, it goes to an additional pushing roller, but there is nothing to press the film against the ox, since we removed these wheels and the film remains under gravity on the ox. At this moment, as the film is not fixed with anything, anything can happen, film shift, printing defects, or even the roller will not be able to push it further along the printing process. I ran into this situation in sublimation printing. Sublimation papers have a chalk base on one side. After 5-7 prints, the upper rollers stopped traces, it was often necessary to remove the roller bar to wash and dry. It's exhausting. After that, I decided to remove the rollers and increase the paper by three centimeters, all the problems went away. By the way, watch the video about DTF from Indonesia, everyone leaves a piece of film not just that they have a lot of it.