Epson TM-C7500 Series Technical Reference Manual page 203

Die-cut label(Black mark) / Fanfold paper
When "Borderless Printing" is disabled
Vertical margins: 1.5 mm {0.06"} (Typical value)
Lateral margins: 1.5 mm {0.06"} (Typical value)
Perforated line
Auto-cut position
Auto-cut position
Perforated line
Auto-cut position
1.5 mm
{ }
0.06"
Outer edge
(Removed)
2.0 mm { }
0.08"
 The distance from the paper cut position to the black mark leading edge must be at least 1.5
mm {0.06"}. If it is less than 1.5 mm {0.06"}, the printer may be unable to print pages
because it fails to sense their black marks or skips them, etc.
 The relation between the issuing pitch (Pm) and the interval of perforated lines (Ph) is as
follow: 
Pm = Ph x integral multiple.
Paper width
1.5 mm
{
0.06"
Print area width
Paper feeding
direction
Print area
}
Label area
Paper
Outer edge
(Removed)
Black mark position
2.0 mm { }
0.08"
Appendix
203