I imagine most people will have more room in front of their machine than behind. If you feed a long sheet in from the front then you would be able to make something as long as the distance from the front of the cut area to the wall behind the machine. However if you then take the sheet out and push it in the other way until the end of the last cut is visible to the camera, then do the next cuts while drawing it out, then I think you will be able to make something about twice as long without having to move the machine away from the wall.
Has this mode been envisaged? Obviously it would need to recognise the cut had been rotated 180 degrees and flip the artwork to match. So it is almost just an extreme case of coping with angular misalignment.