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  • DM420 two-phase hybrid stepping motor driver Model:DM420 stepping motor driver
        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 ......

Introduction
Relevant
DM420型两相混合式步进电机驱动器

DM420接线图


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

Consumption40W 

Temperature

Working Temperature -1045℃;

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.


DM420集电极开路图(共阳极)

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)

dm420

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

DM420 系统接线图

 

 

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