Epson TM-U950P - B/W Dot-matrix Printer, Technical Manual

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2-22 Mechanism Configuration and Operating Principles Rev. A
Cutting operation
When the cutter motor is activated while the mechanism is in the home position (when the
cutter blade does not protrude through the slit of the cutter blade cover and the reset signal is at
high), the cutter motor rotates in the
direction and the rotational force is transmitted to the
transmission gear train. This in turn causes the drive gear in the upper section of the cutter slider
assembly to turn, thereby moving the cutter slider in the
direction.
Since the cutter blade is linked to the dowel on the rear of the cutter slider assembly, it moves
with the slider and cuts the paper at the slit.
After the cut is performed, the polarity of the cutter motor drive current is reversed, so that the
reverse motion returns the cutter blade to the home position.
Full cut operation
When the cutter motor is activated while the mechanism is in the home position, the reset signal
changes from high to low, but the F/P position signal is maintained at high. When the motor
continues to be powered and cutting starts, the F/P position signal changes from high to low. If
the cutter motor is only turned off when this signal again becomes high, the cutter slider
assembly movement stops after a full cut.
Figure 2-35. Auto-cutter Operation
Figure 2-36. Full Cut Operation Timing Chart
CONFIDENTIAL