Epson TM-C3500 Series Technical Reference Manual page 226

When "Borderless Printing" is enabled
Top, bottom, left, right margins: 0 mm (Typical value)
Center of paper width
Perforated line
Auto-cut position
Auto-cut position
Auto-cut position
Edge cutoff 2.0 mm
 If you enabled "Borderless Printing", printing is done with settings for no margins, but the
 Even if "Borderless Printing" is enabled, the maximum value for the print area width is
226
Paper width
Print area width
Edge cutoff 2.0 mm
printing might protrude beyond the paper/label, depending on the actual print position
and the set position for the paper/label. To make sure printing does not protrude out,
ensure margins of 1.5 mm {0.06"} or more in the print data.
104 mm {4.09"}.
Paper feeding
direction
*1 When auto cut is not performed: 
8.0 mm or more
*2 When auto cut is not performed:
11.0 mm or more
Print area
Label area
Backing paper
Black mark
position