Maxim M190G, Техническое руководство

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Overview and Operating Principle 1-7
Figure 1-5 T-detector Mechanism
R detector mechanism
The R detector mechanism is structured of a shade plate of the Holder,trigger yoke of the cam
trigger assembly and a photo interruptor on the Circuit board. When the Cam trigger set rotates
once (1 dot line), the reset signal is generated once. The output waveforms are to be wave-
shaped through a waveform shaping circuit on the designer’s side and constitute Reset signal R
by recognizing the change in waveform level. Reset signal R is used to reset the counting of
Timing signal T for each character or graphics.
NOTE:For example, in printing a printing cycle of one character line (of 5
×
7 font) or a printing cycle of
a bit image, Reset signal R is used only when the first Timing signal T in dot line 1 is confirmed.
Resetting of the counting of Timing signal T is not performed until one character line or each
printing cycle of a bit image is completed.
Figure 1-6 R detector Mechanism
Motor assembly
Detector plate
Photo micro sensor
Circuit board
Circuit board assembly
Photo interruptor
Holder, trigger yoke
Cam trigger assembly
Model M190G Technical Manual
T-detector mechanism
The T-detector mechanism is structured of a Detector plate which is fixed to the motor shaft of
the motor assembly and a photo micro sensor which is mounted on the Circuit board. This
generates Timing signal T of the frequency in proportion to the r.p.m. of the motor. The output
waveforms are to be wave-shaped through a waveform shaping circuit on the designer’s side
and constitute Timing signal T by recognizing the change in waveform level. Print timing and
fast feed trigger electromagnet driving timing are decided by selecting this timing signal.