Epson 1170 - Manual (Page 41)

Using Continuous Paper
3. Release the sprocket units by pushing the sprocket locks
backward.
4. Slide the left sprocket unit to approximately 12 mm (0.5 inch)
from the far left position and pull the lever forward to lock it
in place. Now slide the right sprocket unit to approximately
match the width of your paper, but do not lock it. Move the
paper support so it is midway between the sprocket units.
12 mm (0.5 inch)
Paper Handling 2-13