Epson ColorWorks C3400-LT Technical Reference Guide - Page 209

Black Mark Die-cut Label / Fanfold paper Top margin (inside the label): Left and right margin (inside the label): Bottom margin (inside the label): 2.0 mm (typical value) 2.0 mm (typical value) 2.0 mm (typical value) Center of paper width Perforated line Auto-cut position Paper width 0.5 to 1.0 mm 2.0 mm 1.5 to 3.0 mm Appendix Paper feeding direction Interval of perforated lines: 203.2 mm to 304.8 mm Issuing pitch: 18.0 mm or more (When auto-cutting) 11.0 mm or more 2.0 mm 3.0 to 6.0 mm Auto-cut position 1.5 to 3.0 mm 1.5 to 3.0 mm Perforated line Auto-cut position 2.0 mm Edge cutoff 2.0 mm Print area width 2.0 mm Edge cutoff 2.0 mm Print area Label area Backing paper  Make sure to adjust perforated lines to an integral multiple of issuing pitch.  The perforated line and print area overlap each other to destabilize printing or perforated line and the auto-cut position are misaligned to shorten the life of the autocutter if paper without black marks is used. Use paper with black marks on the back of the paper to adjust the paper position. 209