Custom Engineering MT002-1, User Manual

Page: 17 / 28

5 STEPPER MOTOR
The paper feed pitch for stepper motor is 2 steps for one dotline
(1)
.
(1)
Note: 1 dotline = 0.125 mm.
5.1 Technical speci fi cations
ITEM SPECIFICATION
Drive voltage DC 5.5 V
No. of phases 2
Drive mode Bipolar drive
Step angle 18° ± 2°
Rated current 350 mA / Phase
Resistance 12 Ω ± 7% at 25 °C (each phase)
Inductance 3.7 mH ± 25% at 25°C (1kHz. 1Vrms )
Holding torque 33.7 gf-cm MIN
Pull-out torque (1200 pps) 13.3 gf-cm MIN
Insulation resistance 100 M Ω MIN (500 Vdc)
Insulation class Class E
Dielectric strength AC 500V 1 min.
Life 3000 Hr min.
Maximum coil temperature 115°C
5.2 Excitation sequence
The motor is driven in the forward direction if its excitation phases are switched as per the following steps:
(PH2B)
(PH1B)
(PH1A)
(PH2A)
H
L
H
L
H
L
H
L
STEP1 STEP2 STEP3 STEP4
1 dot line
Excitation Voltage Waveforms
SEQUENCE
SIGNAL
PH2B PH1B PH1A PH2A
Step1
High Low Low High
Step2
High Low High Low
Step3
Low High High Low
Step4
Low High Low High
5. STEPPER MOTOR
User Manual
MT002-1 5-1