| Characteristics |
- Patented technology
- Low cost
- High torque even at high speed
- Power supply up to 50V, Peak current of 4.2A max (3A RMS)
- 3-state current control technology
- Automatic switch to reduced current mode (configurable)
- Can be used with 2 or 4 phase motors (unipolar or bipolar)
- Optically isolated input signals
- Pulse frequency up to 400 KHz
- 15 resolution configurable by DIP switches (up to 25,000 steps / trs on a 200 steps / trs motor)
- Current adjustment by DIP switches (8 positions from 1A to 4.2A)
- Configurable PULSE / DIRECTION or CW / CCW mode
- Protection against short circuits, overvoltage and undervoltage
- Small dimension (118x75.5x33mm)
- Removable connectors
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| Introduction |
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The MD5042 is a high performance microstep driver using the most modern technologies. It can be used to drive 2 or 4 phase hybrid stepper motors (bipolar or unipolar). Thanks to an advanced constant current management technique, it is possible to make the most of the characteristics of your motors. The 3-state current control technology allows precise control of the current in the motor windings with low ripple and therefore less heating.
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| Applications |
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Usable with a wide range of Nema 17 and 23 stepper motors, and for different types of application such as XY tables, marking machines, laser cutting, engraving or placement machines. Particularly recommended for applications requiring low vibrations, high speeds and precision.
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| Spécifications électriques (Tj=25℃) |
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Parameters
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MD5042
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Typical
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Unit
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Output current
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0.54
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-
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4.2 (3A RMS)
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Amps
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Voltage (DC)
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20
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36
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50
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VDC
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Logic signals current
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7
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10
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16
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mA
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Input frequency signals
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0
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-
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300
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Khz
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Isolation resitance
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500
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-
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-
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MΩ
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| Mechanical specifications (Unit: mm, 1 inch=2.54 mm) |
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Figure 1: Mechanical specifications
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Connectors description
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P1 command connector
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Pin Function
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Details
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PUL﹢(+5V)
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Pulse inputs: In PULSE / DIRECTION mode, each rising edge on this input causes a step to advance. Depending on the signal applied to the PUL + or PUL- input, the input will be active from 4 to 5V or from 0 to 0.5V. In CW / CCW mode, the input is used to advance one step in the CW direction. The minimum pulse duration is 1.5 µs. For use with control signals greater than 5V, an additional series resistor is required.
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PUL- (PUL)
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DIR+ (+5V)
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DIR input: In PULSE / DIR mode, this input allows you to select the direction of rotation. In CW / CCW mode (mode configuration by jumper J3 in the housing), the input is used to advance one step in the CCW direction. To ensure quality movements, a change of direction must be followed by a delay of 5ms minimum before sending the pulses.
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DIR- (DIR)
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ENA+ (+5V)
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Enable input: This input is used to activate / deactivate the motor supply. At + 5V, the power is activated. At 0V, the power is deactivated. If this input is not connected, power is activated.
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ENA- (ENA)
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Note: drivers are set to PULSE/DIRECTION mode by default.
P2 power connector
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Pin Funtion
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Details
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Gnd
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Ground DC
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+V
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Motor power DC, +20VDC to +50VDC.
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Phase A
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Motor coil A (fil A+ et A-)
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Phase B
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Motor coil B (fil B+ et B-)
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Microstep resolution selection :
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Microstep resolution selection is selected by DIP Switches 5, 6, 7, and 8 as follow:
| Microstep |
usteps/rev.( 1.8°/rev) |
SW5 |
SW6 |
SW7 |
SW8 |
| 2 |
400 |
OFF |
ON |
ON |
ON |
| 4 |
800 |
ON |
OFF |
ON |
ON |
| 8 |
1600 |
OFF |
OFF |
ON |
ON |
| 16 |
3200 |
ON |
ON |
OFF |
ON |
| 32 |
6400 |
OFF |
ON |
OFF |
ON |
| 64 |
12800 |
ON |
OFF |
OFF |
ON |
| 128 |
25600 |
OFF |
OFF |
OFF |
ON |
| 5 |
1000 |
ON |
ON |
ON |
OFF |
| 10 |
2000 |
OFF |
ON |
ON |
OFF |
| 20 |
4000 |
ON |
OFF |
ON |
OFF |
| 25 |
5000 |
OFF |
OFF |
ON |
OFF |
| 40 |
8000 |
ON |
ON |
OFF |
OFF |
| 50 |
10000 |
OFF |
ON |
OFF |
OFF |
| 100 |
20000 |
ON |
OFF |
OFF |
OFF |
| 125 |
25000 |
OFF |
OFF |
OFF |
OFF |
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Current setting
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| Peak Current (A) |
RMS (A) |
SW1 |
SW2 |
SW3 |
| 1.0 |
0.71 |
ON |
ON |
ON |
| 1.46 |
1.04 |
OFF |
ON |
ON |
| 1.91 |
1.36 |
ON |
OFF |
ON |
| 2.37 |
1.69 |
OFF |
OFF |
ON |
| 2.84 |
2.03 |
ON |
ON |
OFF |
| 3.31 |
2.36 |
OFF |
ON |
OFF |
| 3.76 |
2.69 |
ON |
OFF |
OFF |
| 4.20 |
3.00 |
OFF |
OFF |
OFF |
SW4 sur OFF : current is reduced by 60% one second after motor stops.
SW4 sur ON : current is always at maximum.
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Raccordement typique
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Figure 2: Typical setting :
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