wantai DQ542MA User manual

Stepper Motor Driver DQ542MA
Electrical specification:
Input voltage
18-50VDC
Input current
＜4A
Output current
1.0A～4.2A
Consumption
Consumption：80W；Internal Insurance
：6A
Temperature
Working Temperature -10～45℃；
Stocking temperature -40℃～70℃
Humidity
No condensation, no water droplets
gas
Prohibition of combustible gases and
conductive dust
weight
300GS
Pins assignments and description:
1) Connector Pins Configurations
Pin Function
Details
PUL +,PUL-
Pulse signal, PUL+ is the positive end of pulses input pinPUL- is the negative
end of pulse input pin
DIR+,DIR-
DIR signal: DIR+ is the positive end of direction input pin DIR- is the negative
end of direction input pin

ENBL+
Enable signal: ENBL+ is the positive end of direction input pin. This signal is
used for enabling/disabling the driver. High level for enabling the driver and
low level for disabling the driver.
ENBL-
ENBL- is the negative end of direction input pin. Usually left unconnected
(enabled)
2) Pins wiring diagram:
PC’s control signals can be active in high and low electrical level. When the high electrical leve
lis active, all control negative signals will be connected together to GND. When low electrical le
vel is active, all control positive signals will be connected together to public port. Now give tw
o examples( Open collector &PNP), please check them:
Fig 1. Input port circuit (Yang connection)
PC open connector output

Fig. 2 Input port circuit ( Yin connection)
PC PNP output
Note: When VCC=5V, R=0
When VCC=12V, R=1K, ＞1/8W
When VCC=24V, R=2K,＞1/8W
R must connect in the control signal part .
3.Function choice ( Using DIP pins to achieve this function)
1) Micro step resolution is set by SW 5,6,7,8 of the DIP switch as shown in the following table:
2) Standstill current setting
SW4 is used for this purpose. OFF meaning that the standstill current is set to be half of the se
lected dynamic current and ON meaning that standstill is set to be the same as the selected dy
namic current.
3) Output current setting:
The first three bits (SW 1, 2, 3)of the DIP switch are used to set the dynamic current.
Select a setting
Closest to your motor’s required current
Output current (A)
SW1
SW2
SW3
PEAK
RMS
ON
ON
ON
1.00
0.71
OFF
ON
ON
1.46
1.04
ON
OFF
ON
1.91
1.36
OFF
OFF
ON
2.37
1.69
ON
ON
OFF
2.84
2.03
OFF
ON
OFF
3.31
2.36
ON
OFF
OFF
3.76
2.69
OFF
OFF
OFF
4.20
3.00
4) Semi-flow function:
Semi-flow function is that there is not step pulse after 500 ms, the driver output current
automatically reduced to 70% of rated output current, which is used to prevent motor heat.
4. Pins of motor & power:
SW5
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
SW6
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
SW7
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
SW8
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
PULSE/
REV
400
800
1600
3200
6400
1280
0
2560
0
1000
2000
4000
5000
8000
1000
0
2000
0
2500
0

5. Mechanical Specification:
To have 20mm of space around, cannot be placed next to other heating devices. Whats more,
avoid dust, oil mist, corrosive gas, heavy humidity and high vibration.
6. Adjustment of troubleshooting
1) , the status on light’s indication
PWR: green, normal work light.
ALM: red, failure light, the motor with phase short-circuit, overvoltage and under-voltage
protection.
2) Troubles
Alarm indicator
Reasons
Measures
LED off turn
Wrong connection for power
Check wiring of power
Low-voltages for power
Enlarge voltage of power
Motor and
power pins
1
A+
Motors wiring
2
A-
3
B+
4
B-
5,6
DC+ D
C-
Power supply
Power supply ：DC18-50VDC

Motor doesn’t run, without
holding torque
Wrong connection of stepper
motor
Correct its wiring
RESET signal is effective
when offline
Make RESET ineffective
Motor doesn’t run,
but maintains holding
torque
Without input pulse signal
Adjust PMW & signal level
Motor runs wrong direction
Wrong wires’ connection
Change connection for any of 2 wires
Wrong input direction signal
Change direction setting
Motor’s holding torque is to
o small
Too small relative to current set
ting
Correct rated current setting
Acceleration is too fast
Reduce the acceleration
Motor stalls
Rule out mechanical failure
Driver does not match with the
motor
Change a suitable driver
7. Driver wiring
A complete stepper motor control system should contain stepper drives, DC power supply and
controller (pulse source). The following is a typical system wiring diagram