Specifications

3-10
3.4.3 Precautions for Driving the Motor
(1) Motor Current Control
Low speed motor driving while printing due to a division drive method, print data, and input data transfer
speed may cause noise or print trouble to occur due to over torquing or overheating of the motor.
To prevent these from occurring, be sure to set the motor current as follows and perform two-current
control.
Activate the motor with the 1st setting current in each motor drive step.
Change the activation current to the 2nd setting current after activating the motor with the 1st setting
current for T1.
T1 is defined from each period of the motor drive step and Vp voltage as follows:
How to define T1 (unit: µ
µµ
µs)
When Vp is under 7.2 V :
T1: Compare the following two values and adopt the smaller one.
(Each period of the motor drive step - 500) and 925.9
When Vp is 7.2 V or more :
T1: Compare the following two values and adopt the smaller one.
(Each period of the motor drive step - 500) and (1000000 / (3600 - Vp × 350))
In use at temperature below -5°C, Control the 0.23(A) at 1st current.
CTCRL
T1 T1 T1 T1 T1
PH1
PH2
PH3
PH4
Start 1st step 2nd step 3rd step 4th step
230mA
150mA
(5.78ms)
(5.78ms) (3.57ms) (2.76ms) (2.31ms)
Set the 1st setting current at CTCRL=“High”: 0.23 (A)
Set the 2nd setting current at CTCRL=“Low”: 0.15 (A)
Figure 3-6 Motor Drive Timing Chart (in use at temperature over -5°
°°
°C)