Introduction:
DQ542MA is a type of two-phase hybrid stepping motor driver, the drive voltage of which is from 18VDC to 50VDC. It is designed for use with 2-phase hybrid stepper motor of all kinds with 42mm to 86mm outside diameter and less than 4.0A 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. Holding torque when DQ542MA 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, Computer embroider machine, packing machines and so on.
Features:
High performance, low price
Average current control, 2-phase sinusoidal output current drive
Supply voltage from 18VDC to 50VDC
Opto-isolated signal I/O
Overvoltage, under voltage, overcurrect, phase short circuit protection
15 channels subdivision and automatic idle-current reduction
8 channels output phase current setting
Offline command input terminal
Motor torque is related to speed, but not related to step/revolution
High start speed
High holding torque under high speed
Electrical specification:
18-50VDC | |||
<Output current | ~Consumption | :;:Temperature | ~;Stocking temperature -40℃70℃ |
No condensation, no water droplets | |||
Prohibition of combustible gases and conductive dust | |||
300GS |
1. Pins assignments and description:
1) Connector Pins Configurations
Details |
Pulse signal, PUL+ is the positive end of pulses input pin
|
DIR signal: DIR+ is the positive 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- 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 (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:
:
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 | 12800 | 25600 | 1000 | 2000 | 4000 | 5000 | 8000 | 10000 | 20000 | 25000 |
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
Output current (A)Alarm indicator Causes | LED off turn | Check wiring of power | ||||
Enlarge voltage of power | ||||||
Wrong connection of stepper motor | RESET signal is effective when offline | Motor doesn’t run, but maintainsWithout input pulse signal | Motor runs wrong direction | Change connection for any of 2 wires | ||
Change direction setting | ||||||
Too small relative to current setting | Acceleration is too fast | Motor stalls | Driver does not match with the motor | <span style="font-size:10.0pt;font-family:"">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.