Seiko 201 Spécifications télécharger pdf (Page 16)

2.4 TG (TACHO-GENERATOR) OUTPUT CHARACTERISTICS

The TG is a signal generator directly connected to the motor, that generates false sine waves of two

cycles per 1 turn of the motor. These waves are converted by a waveform shaping circuit into

rectangular wave signals, which are used as a pulse impression timing signal for the thermal head.

(1) TG output

Table 2-3 TG Output

4 to 6V 5V

Output voltate (Vp-p) 2.0 to 7.0 3.5 to 6.0

Period (ms) 2.5 to 6.5 3.0 to 5.0

(2) Sample TG waveform shaping circuit

180k

Vcc

Timing signal

560P

2SC1740

1SS133

Figure 2-4 Sample TG waveform shaping circuit

TG signal

Timing signal

* Generation of the timing signals depends on the user.

Figure 2-5 TG Timing Signal

2-8

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Seiko 201 Spécifications Page 16