User`s manual

CBM-202PC-04 User’s Manual
34 CITIZEN
5.1.2 Thermal Head Application Energy
This LSI automatically controls the energy applied to the thermal head according to a
temperature and Vp voltage.
With the function selection terminal, print density can be set to the following 4 kinds of
ranks listed in Fig. 5.3.
Fig. 5.3
Gate Array Pin-31 Gate Array Pin-36 Print Density Level
Print Density
Rate
LOW LOW Light 0 80 %
LOW HIGH Standard 1 100 %
HIGH LOW Slightly dark 2 120 %
HIGH HIGH Dark 3 150 %
5.2 Motor Drive
There are the following features:
1) Prevents heat generation of the motor and restrains current consumption through PWM
control.
2) Controls acceleration at start time.
3) Capable of providing fine control according to a voltage(VH) applied to the motor to realize
optimum paper feed.
Table 5.1 lists the maximum drive speeds at major voltages.
Table 5.1
VH Voltage Max. Drive Speed At Auto Loading
5 V 300 pps 75 pps
6 V 490 pps 122 pps
7.2 V 800 pps 200 pps
Notes)
• The maximum drive speed may slightly differ depending on the actual processing
time or voltage detection accuracy.
• If the head drive time becomes longer than the 1-step time of the motor during
printing, the motor will be driven after the head. During printing, therefore, the
drive speed will be slowed down due to the head divided driving method.
• The drive speed at auto loading time is 1/4 of the maximum drive speed at each VH
voltage.