This item includes:

1PC Stepper motor driver DM420A,1.7A,12-36VDC,128Micostep Bipolar , CNC New


Detailed information:

Introduction: 
DM420A  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 DM420A 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 voltage12-36VDC
Input current< 2A
Output current0.44A- 2.83A
ConsumptionConsumption:40W; 
Temperature
Working Temperature -10~45?;
Stocking temperature -40?~70?
HumidityNot condensation, no water droplets
gasProhibition of combustible gases and conductive dust
weight70G

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. Now give two examples(Open collector
&PNP), please check them:
 
 
                     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 

SW1SW2SW3PEAKRMS
ONONON0.44 A0.31 A
OFFONON0.62 A0.44 A
ONOFFON0.74 A0.52 A
OFFOFFON0.86 A0.61 A
ONONOFF1.46 A1.03 A
OFFONOFF1.69 A1.20 A
ONOFFOFF2.14 A1.51 A
OFFOFFOFF2.83 A2.00 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











DataCaciques

On Dec-27-19 at 01:32:52 PST, seller added the following information:

DataCaciques