Brother PT 1800 - P-Touch 1800 Thermal Transfer Printer, Service Manual

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II - 2
[ For non-laminated thermal film tape cassettes ]
If the selected heating element(s) generates heat, the thermal film tape develops itself to
produce a dot on the tape. The tape is advanced and the next heating cycle is repeated,
thus forming a character on the tape.
[ For stamp tape cassettes ]
If the selected heating element(s) generates heat, the porous-stamp tape will be melted
so that a pore (pores) will be formed in the tape. The tape is advanced and the next
heating cycle is repeated, thus forming a character of pores on the tape. The printed
stamp tape can be used as the face of a stamp. When the stamp is pressed against the
ink-pad, it will absorb ink through the pores.
For laminated tape cassettes, instant lettering tape cassettes, and iron-on transfer tape
cassettes, the CPU processes the print data to generate a mirror image so that the
printed character can be seen normally when viewed from the other side of the printed
face of the tape.
n
Character Formation
While the drive motor (DC motor) feeds the tape and ink ribbon (only the tape when
using non-laminated thermal film tape cassettes or stamp tape cassettes) by 0.141 mm
for 13.6 ms, the thermal head generates heat once. The feed amount of 0.141 mm is
smaller than the width (0.195 mm) of the heating elements so that the heat generated at
one heating cycle will overlap with the next heating cycle. This forms a character having
no gap between adjacent printed dots.