Always adjust the potentiometer on your stepper driver to match the motor's 1.5A rating. Exceeding this current will cause overheating and potential motor failure.
The is a NEMA 17 stepper motor manufactured by Hunan Keli Motor Co. and is commonly used as a stock component in Creality 3D printers, such as the Ender-3 series. Technical Specifications
Smooth, precise motion control for photography. 6. Tips for Usage
High resistance limits current naturally. This motor was designed before cheap, efficient chopper drivers existed. It runs directly off a 26V regulated supply without needing a current-limiting driver. bj42d15 26v10 stepper motor datasheet
Disclaimer: Datasheets can vary slightly between manufacturers. Always verify the resistance and inductance with a multimeter if in doubt.
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step angle provides high resolution, enabling fine movements crucial for printing intricate 3D models. With holding torque exceeding Always adjust the potentiometer on your stepper driver
The is a specialist component, not a commodity 3D printer motor. Its defining characteristics – 26V rated voltage and 26 Ohm phase resistance – make it uniquely suited for constant voltage drive systems and legacy equipment restoration.
Datasheets typically provide a "Pull-out Torque" curve. For the BJ42D15 26V10, expect the following performance when driven at 24V with a microstepping driver:
(such as the Ender 3 S1) for movement along the X or Y axes. Technical Specifications and is commonly used as a stock component
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| Symptom | Possible Cause | Solution | | :--- | :--- | :--- | | | Vref is set too high, causing overcurrent. | Lower the driver's Vref. A user reduced theirs from 1.1V to 0.9V to solve overheating. | | Motor is extremely hot | Incorrect motor variant (e.g., a 0.8A motor treated as a 1.5A motor). | Verify the physical motor length (34mm) and its label code. | | Motor loses steps / skips | Driver current is set too low. | Recalculate and increase the Vref, ensuring it stays below the motor's rated current. | | Motor does not move | Incorrect wiring (e.g., mixing phases A and B). | Verify with a multimeter that each coil is connected to the correct driver terminals. | | Motor vibrates but does not rotate | A4988 driver's microstep pins (MS1, MS2, MS3) are not set correctly. | Check the state of your driver's microstep selection pins. | | Clicking noise / no movement | The driver's enable pin is active, or the motor current is too low. | Check driver enable logic and Vref calculation. |