Epson TM-m30 Technical Reference Manual page 31

After using the printer for an extended period at 58 mm, do not return to 80 mm. Parts of the print
head that do not normally touch the paper may be damaged by the platen roller, and the
autocutter may wear out.
3
Set the paper width in software setting mode.
For information about the software setting mode, see "Software Settings" on page 47.
Chapter 2 Setup
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