Quick Detail
Place of Origin
HS-CODE
85-
Package & Delivery Lead Time
Detailed Description
DM420 is a type of two-phase hybrid stepping motor driver, The drive voltage of which is from 12VDC to 36VDC. It is designed for use with 2-phase hybrid stepper motor of all kinds with 20mm to 42mm outside diameter and less than 2.0A phase current. This circuit that it adopts is similar to the circuit of servo control which enables the motor run smoothly almost without noise and vibration. Hording torque when DM420 run under high speed is also significantly higher than the other two-phase driver, what’s more, the positioning accuracy is also higher. It is widely used in middle and big size numerical control devices such as curving machine, CNC machine, and computer embroider machine, packing machines and so on.
Features:
l High performance, low price
l Average current control, 2-phase sinusoidal output current drive
l Supply voltage from 12VDC to 36VDC
l Opto-isolated signal I/O
l Overvoltage, under voltage, overcorrect, phase short circuit protection
l 8 channels subdivision and automatic idle-current reduction
l 8 channels output phase current setting
l Offline command input terminal
l Motor torque is related with speed, but not related with step/revolution
l High start speed
l High hording torque under high speed
Electrical specification:
Input voltage
12-36VDC
Input current
＜ 2A
Output current
0.44A- 2.83A
Consumption
Consumption：40W；
Temperature
Working Temperature -10～45℃；
Stocking temperature -40℃～70℃
Humidity
Not condensation, no water droplets
gas
Prohibition of combustible gases and conductive dust
weight
70G
Pins assignments and description:
1) Connector Pins Configurations
Pin Function
Details
PUL +,PUL-
Pulse signal, PUL+ is the positive end of pulses input pin
PUL- 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 level is active, all control negative signals will be connected together to GND. When low electrical level is active, all control positive signals will be connected together to public port.
Fig 1. Input port circuit (Positive connection)
PC open connector 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
SW5
ON
OFF
ON
OFF
ON
OFF
ON
OFF
SW6
ON
ON
OFF
OFF
ON
ON
OFF
OFF
SW7
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Pulse/rev
200
400
800
1600
3200
6400
12800
25600
Micro
1
2
4
8
16
32
64
128
2) Standstill current setting
SW4 is used for this purpose. OFF meaning that the standstill current is set to be half of the selected dynamic current and ON meaning that standstill is set to be the same as the selected dynamic 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
SW1
SW2
SW3
PEAK
RMS
ON
ON
ON
0.44 A
0.31 A
OFF
ON
ON
0.62 A
0.44 A
ON
OFF
ON
0.74 A
0.52 A
OFF
OFF
ON
0.86 A
0.61 A
ON
ON
OFF
1.46 A
1.03 A
OFF
ON
OFF
1.69 A
1.20 A
ON
OFF
OFF
2.14 A
1.51 A
OFF
OFF
OFF
2.83 A
2.00 A
4) Semi-flow function:
Semi-flow function is that there is not step pulse after200 ms, the driver output current automatically reduced to 40% of rated output current, which is used to prevent motor heat.
4. Pins of motor & power:
Motor and power pins
1
A+
Motors wiring
2
A-
3
B+
4
B-
5,6
DC+ DC-
Power supply
Power supply ：DC12-36VDC
The peak input current cannot be up to 2A
5. Mechanical Specification:
To have 20mm of space around ,cannot be placed next to other heating devices. What’s more, avoid dust, oil mist, corrosive gas, heavy humidity and high vibration. (Unit=mm)
pic 3
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 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 too small
Too small relative to current setting
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
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