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 interface (step, direction and enable). 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.
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's manual.
|Characteristics||Description - Value|
|Microstep resolution||1/1, 1/2, 1/4 and 1/16|
|Number of axis||1|
|Phase current||7.5 A max|
|Current setting||0.75-7.5 A (by external resistor)|
|Supply voltage||20-40VDC max|
|Input control interface||opto-isolated STEP, DIR and ENA (enable) command lines|
|Input current||5mA at 5V (TTL)|
|Input signal width||> 1 μS (recommended >5 μS)|
|Dimensions||77 mm x 105 mm x 38 mm|
NOTE: specifications are subject to change without notice
CNC MACHINE CONTROL BY MICROSTEP DRIVES MST-107
Small CNC machine control by 3-axis SMCU1 control unit with 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.
MIKROSTEP DRIVE MST-107 WITH NEMA 42 STEPPER MOTOR
Video shows test of microstep driver MST-107 with Zebotronics SM 108.2.18.JH stepper motor (weight 6.1 kg). Windings are connected in parallel. Microstep resolution was 1/4 step with 7.5 A phase current. Supply voltage was 32VDC.
Maximum revolution speed is 1200 RPM.