Seiko 201 Spécifications télécharger pdf (Page 20)

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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 voltage (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

Figure 2-4 Sample TG waveform shaping circuit

Timing signal

Vcc

180k

Ω

180k

Ω

560P

2SC1740R

1SS133

Figure 2-5 TG Timing Signal

* Generation of the timing signals depends on the user.

TG signal

Timing signal

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