Description
Product Overview
The ZK-BMG DC Motor Speed Controller is engineered to provide precise and reliable speed regulation for a broad spectrum of DC motor applications. Designed with a robust input voltage range of 9 V to 60 V and a rated current of 12 A (with a maximum of 20 A), this controller can handle up to 500 W of power, making it suitable for both low‑power hobby projects and demanding industrial tasks. Its core functionality is driven by a highly adjustable PWM signal that operates between 1 kHz and 99 kHz, allowing users to fine‑tune motor speed with a 1 kHz step resolution. The controller incorporates a digital encoder knob that provides an intuitive interface for setting duty‑cycle limits, frequency, and on/off states, while a built‑in digital display shows real‑time duty‑cycle percentages and frequency values. Protective features include reverse‑polarity protection, over‑current detection, and a dedicated STOP port for external safety switches, ensuring safe operation even in challenging environments.
Compact yet durable, the unit measures 3.11 × 1.69 × 1.02 inches and weighs only 1.52 ounces, allowing easy integration into tight spaces. Its PCB layout is optimized for heat dissipation, and the enclosure is made from high‑impact engineering plastic that resists mechanical stress and chemical exposure. The controller is compatible with a wide variety of DC motors, including brushed and brushless types, and can be paired with encoders for closed‑loop speed feedback. Whether you are building a robotic arm, a CNC spindle, an electric vehicle prototype, or a custom automation system, the ZK‑BMG controller offers the flexibility and reliability required for precise motion control.
![[Product front view showing all components]](https://www.agnex.store/wp-content/uploads/2026/08/c06e6c825049406d9f3a2c8a79577266.jpg)
Usage
In robotics, the controller’s fast response time and fine PWM granularity enable smooth acceleration and deceleration, which is essential for articulated joints and mobile platforms. Its ability to operate at high frequencies reduces audible noise and improves motor efficiency, making it ideal for applications where quiet operation is critical, such as indoor service robots or educational kits. For CNC machines, the controller provides the torque and speed stability needed to drive spindle motors and feed mechanisms, while the encoder knob allows operators to quickly adjust feed rates without interrupting the machining process.
Hobbyists and makers will appreciate the plug‑and‑play nature of the ZK‑BMG module. The clear labeling of terminals—POWER, MOTOR, ENCODER, STOP—simplifies wiring, and the optional STOP port can be linked to external push‑buttons or safety interlocks to halt motor operation instantly. The controller’s digital display eliminates the need for external monitoring equipment, giving users immediate feedback on duty‑cycle settings and frequency, which speeds up troubleshooting and fine‑tuning. Additionally, the device’s low power consumption when idle makes it suitable for battery‑powered projects, such as remote‑controlled vehicles or portable power tools.
Industrial environments benefit from the controller’s built‑in protection mechanisms. Reverse‑polarity protection safeguards the circuitry against accidental wiring errors, while over‑current detection shuts down the output if the motor draws more than the rated current, preventing damage to both motor and controller. The robust plastic housing and conformal coating on the PCB provide resistance to dust, moisture, and minor chemical exposure, extending the product’s lifespan in harsh settings. The STOP port’s compatibility with 3.3 V logic levels also allows integration with programmable logic controllers (PLCs) and microcontroller‑based safety systems.
Why Choose Us
Choosing the ZK‑BMG DC Motor Speed Controller means selecting a product that combines engineering precision with user‑centric design. Our manufacturing process adheres to strict quality standards, including ISO‑9001 certification, ensuring each unit undergoes comprehensive testing for voltage tolerance, current handling, and PWM accuracy before leaving the factory. The controller’s firmware is written in clean, modular code, allowing for future updates and customization without compromising stability.
We stand behind our product with a dedicated technical support team that offers assistance from initial setup through advanced configuration. Customers receive detailed wiring diagrams, a quick‑start guide, and access to an online knowledge base that includes troubleshooting tips, firmware updates, and application notes. Our after‑sales service includes a 12‑month warranty covering defects in materials and workmanship, and we offer optional extended warranty plans for enterprises that require longer coverage.
Environmental responsibility is also a core value. The controller’s components are RoHS‑compliant, and the packaging is made from recyclable materials. By selecting our controller, you not only gain a high‑performance motor driver but also contribute to sustainable manufacturing practices.
Key Features
- Wide voltage range (9‑60 V) accommodates diverse motor types and power sources
- Adjustable PWM frequency (1‑99 kHz) for smooth, quiet motor operation
- Digital encoder knob with real‑time duty‑cycle display simplifies speed adjustments
- Built‑in safety protections including reverse‑polarity and over‑current detection
- Compact, rugged housing designed for easy integration in tight spaces
- Comprehensive technical support and 12‑month warranty for peace of mind
FAQ
What voltage range can the controller handle?
The controller operates safely from 9 V up to 60 V DC, covering most hobby and industrial DC motor requirements.
Can I use the controller with a brushless DC motor?
Yes, the controller is compatible with both brushed and brushless DC motors, provided the motor’s voltage and current specifications fall within the controller’s limits.
How do I set the duty‑cycle limits?
Using the encoder knob, short‑press to enter the setting interface, then rotate the knob to select the desired lower or upper duty‑cycle limit. Confirm the selection with a short press.
Is there a way to connect an external emergency stop?
Absolutely. The STOP port on the back of the unit can be wired to an external push‑button or safety interlock that operates at 3.3 V logic level, allowing immediate motor shutdown.
What warranty does the product include?
The controller comes with a 12‑month limited warranty covering any defects in materials or workmanship, and optional extended warranty plans are available.







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