Brother P-touch PT-3600, Service Manual

Page: 18 / 165

II-2
[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.
Character Formation
While the tape feed motor feeds the tape and ink ribbon (only the tape when using AV labels
cassettes or stamp tape cassettes) by 0.0705 mm, the thermal head generates heat once. The
feed amount is determined by sending five pulses of the signal per dot (0.0705 mm) when a
pair of photointerrupters detect the encode gear fitted over the motor shaft. The feed amount
of 0.0705 mm is smaller than the width (0.08 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.