1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the GODIYMODULES ZK-SMC02 DC 5-30V 4A Stepper Motor Driver and Controller. This integrated unit combines a stepper motor controller and driver, offering features such as adjustable delay, speed regulation, angle adjustment, and distance control. It supports both automatic and manual operation, includes a physical button interface, an LCD display, and TTL serial communication capabilities.

Figure 1.1: GODIYMODULES ZK-SMC02 Stepper Motor Driver and Controller.
2. Safety Information
Please read and understand all safety instructions before operating this device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure the power supply voltage is within the specified range of DC 5-30V.
- Do not exceed the maximum current rating of 4A.
- Disconnect power before making any wiring connections or disconnections.
- Avoid exposing the device to moisture, extreme temperatures, or corrosive environments.
- Do not attempt to disassemble or modify the device. Refer all servicing to qualified personnel.
- Ensure proper ventilation to prevent overheating.
3. Package Contents
Verify that all items are present in the package:
- 1 x ZK-SMC02 Stepper Motor Driver and Controller
4. Specifications
| Feature | Specification |
|---|---|
| Model | ZK-SMC02 |
| Input Voltage | DC 5-30V |
| Max Current | 4A |
| Display Type | LCD |
| Communication | TTL Serial Communication |
| Dimensions (Package) | 5.51 x 3.74 x 2.28 inches |
| Item Weight | 3.2 ounces |
| Material | Plastic |
5. Product Overview
The ZK-SMC02 features an intuitive front panel with an LCD display, control buttons, and an encoder knob for easy operation and parameter adjustment.

Figure 5.1: Front Panel Controls and Indicators.
- CW Button: Initiates forward (clockwise) rotation.
- CCW Button: Initiates reverse (counter-clockwise) rotation.
- RUN/STOP Button: Starts or stops the motor. Also used to exit menu settings.
- Encoder Setting Knob: Used to adjust speed, parameters, and navigate menus. Pressing the knob enters menu settings.
- CW Indicator: Lights up when the motor is rotating clockwise.
- CCW Indicator: Lights up when the motor is rotating counter-clockwise.
- LCD Display: Shows current speed, parameters, and menu options.
6. Setup and Wiring
Proper wiring is crucial for the correct operation of the ZK-SMC02. Refer to the diagram below for connection details.

Figure 6.1: Wiring Diagram for ZK-SMC02.
6.1 Power Supply Connection
- Connect the DC 5-30V power supply to the DC+ and DC- terminals. Ensure correct polarity.
6.2 Stepper Motor Connection
Connect your stepper motor to the A+, A-, B+, B- terminals. Refer to your stepper motor's datasheet for correct phase connections.
6.3 Serial Communication (Optional)
For TTL serial communication, connect as follows:
- GND: Connected to negative common terminal of driver.
- EN: Connected to driver enable terminal.
- DIR: Connected to driver direction input.
- TX: Transmit data.
- RX: Receive data.
- +3.3V: Power output for external modules (if applicable).
7. Operating Instructions
7.1 Basic Operation
- Power On: Connect the power supply. The LCD will display the current operating mode or speed.
- Adjust Speed: In the operation interface, rotate the encoder knob to adjust the motor speed.
- Forward Rotation (CW): Press the CW button. The CW indicator will light up.
- Reverse Rotation (CCW): Press the CCW button. The CCW indicator will light up.
- Start/Stop: Press the RUN/STOP button to start or pause the motor.
7.2 Menu Settings
To access and adjust advanced parameters, follow these steps:

Figure 7.1: Menu Navigation and Parameter Adjustment.
- Enter Menu: Press and hold the encoder knob to enter the menu settings interface. The display will show 'F-01'.
- Navigate Parameters: In the menu settings interface, rotate the encoder knob to change the parameter codes from F-01 to F-13.
- Select Parameter for Adjustment: Short press the encoder knob to enter the F-XX corresponding menu parameter setting state. The parameter value will flash.
- Adjust Parameter Value: Rotate the encoder knob to adjust the flashing parameter value.
- Save and Exit: Long press the encoder knob to save the parameters and exit to the running interface.
- Exit Parameter Settings: Short press the RUN/STOP button to exit parameter settings and return to the main menu number adjustment interface.
7.3 Parameter Descriptions
The following table details the available parameters and their functions. Please note that the image for this table was not provided with a distinct URL in the JSON, so the content is transcribed for clarity.
| Serial Number | Function | Adjustable Range | Defaults | Action Mode Selection (P01) |
|---|---|---|---|---|
| F-01 | Action mode selection | 1-9 | 1 |
|
| F-02 | Number of forward rotation pulses | 1-9999 | 1600 | Unit: Number |
| F-03 | Forward rotation speed | 1-999 | 1 | Unit: Revolution / minute |
| F-04 | Number of reverse pulses | 1-9999 | 1600 | Unit: Number |
| F-05 | Reversal speed | 0.1-999 | 10 | Unit: Circle revolution/min |
| F-06 | Cycle work times (among them - numerous times) | 0-9999 or countless times | 1 | Unit: Times |
| F-07 | Forward rotation in place delay | 0.0-999.9 | 0.0 | Unit: Second (accuracy ±0.2 second) |
| F-08 | Reverse in place delay | 0.0-999.9 | 0.0 | Unit: Second (accuracy ±0.2 second) |
| F-09 | Number of pulses per revolution | 1-9999 (X10) | 160 | For example, the step angle is 1.8 degrees, the stepping motor drives 8 segments, and one revolution is 360 / 1.8 * 8 = 1600, setting 160, actual 1600. |
| F-10 | Main interface display content | 00-01 | 00 |
|
| F-11 | Action when pressing pause key | 0-1 | 0 |
|
| F-12 | Acceleration and deceleration level | 1-100 | 20 | 1 slowest, 100 fastest |
| F-13 | Postal address | 1-255 | 1 |
8. Maintenance
To ensure the longevity and optimal performance of your ZK-SMC02 controller, follow these maintenance guidelines:
- Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to direct sunlight or high humidity.
- Regularly check all wiring connections to ensure they are secure.
- Do not use harsh chemicals or abrasive cleaners on the device.
9. Troubleshooting
If you encounter issues with your ZK-SMC02, refer to the following common problems and solutions:
- Motor not moving:
- Check power supply connections and ensure voltage is within 5-30V.
- Verify stepper motor wiring (A+, A-, B+, B-).
- Ensure the motor is not in a paused state (press RUN/STOP).
- Check parameter F-01 for correct action mode selection.
- Incorrect speed or direction:
- Adjust speed using the encoder knob.
- Verify CW/CCW button presses.
- Check parameters F-03 (forward speed) and F-05 (reversal speed).
- Ensure F-09 (pulses per revolution) is set correctly for your motor.
- Display not working:
- Check power supply.
- Contact customer support if the issue persists.
10. Warranty and Support
For warranty information or technical support, please refer to the product's purchase platform or contact GODIYMODULES customer service directly. Keep your purchase receipt for warranty claims.



