MST-107 is microstep drive for stepper motors. Control of a stepper motor is done via opto-isolated STEP/DIR/ENA lines. PWM mode with a frequency of 19 kHz ensures quiet operation.
On board DIP switches are used for selection of microstep resolution (1/1, 1/2, 1/4 and 1/16). This means that 200, 400, 800 or 3200 pulses are needed on the STEP line, for stepper motor with 1.8°/step to make a one revolution.
The drive can operate in slow-, mixed-, or fast-decay modes (selected by micro switches), which results in increased step accuracy and reduced power dissipation.
Stepper motor current is set in the range of 0.75 to 7.5 A by one external resistor.
Control of stepper motor is realised through 3-wire step, direction and enable interface. This means that for multi-axis control can be using the already developed software such as Mach2, Mach3, TurboCnc (free), KCam and similar control software.
MST-107 can be connected to PC pallalel port (LPT) by using brakout board IO3-R2.
Drive output stage use powerful MOSFETs in TO220 package.
Drive reduces motor phase current to 50% of the set value when the motor is stopped more than 2 s. This reduces unnecessary heating of stepper motor.
Built-in soft start energizes stepper motor 1s after the arrival of the supply voltage, reducing electric shock at power up.
For currents above 3A per phase drive require additional heat sink.
TYPICAL CONNECTION DIAGRAM
More data about microstep stepper motor drive MST-107 can be found in user manual
|Characteristics||Description - Value|
|Microstep resolution||1/1, 1/2, 1/4 and 1/16|
|Number of axis||1|
|Phase current||7.5A max|
|Current setting||0.75-7.5 A (by external resistor)|
|Supply voltage||20-40 V DC max|
|Input control interface||opto-isolated STEP, DIR and ENA (enable) command lines|
|Input current||5mA at 5V (TTL)|
|Input signal width||> 1 S (recommended >5 mikroS)|
|Dimensions||77 mm x 105 mm x 38 mm|
CNC MACHINE CONTROL BY MICROSTEP DRIVES MST-107
STEPPER MOTOR HIGH SPEED TEST WITH MICROSTEP DRIVE MST-107
Video shows test of microstep driver MST-107 with Nanotec stepper motor SH8618M6008 (2,4 V; 6.0 A; 4 Nm; 8 leads; dimensions 82 mm x 82 mm x 94 mm; weight 2.65 kg). Windings are connected in parallel. Microstep resolution was 1/4 step with 7.5 A phase current. Supply voltage was 31VDC.
Maximum revolution speed is 3360 RPM.