Waveshare 20kg.cm Bus Servo Motor, 106PRM High Speed, Large Torque, With 360 Degrees High Precision Magnetic Encoder

The Waveshare 20kg.cm Bus Servo Motor is a high-performance industrial-grade servo actuator featuring 106 RPM speed capability and 20 kilogram-centimeter torque output, designed for precision robotic applications requiring continuous 360-degree rotation feedback. Professional roboticists, automation engineers, and industrial control system designers utilize this servo motor for applications demanding accurate position sensing, high torque delivery, and reliable bus communication protocols. This product solves the critical challenge of integrating position feedback with high-torque actuation in compact robotic systems where traditional servo motors fall short in torque capacity or feedback resolution.

Product Overview

The Waveshare 20kg.cm Bus Servo Motor integrates a brushless DC motor core with an advanced 360-degree high-precision magnetic encoder, enabling real-time absolute position feedback across full rotation ranges. Unlike conventional servos limited to 180-degree operation, this motor supports continuous 360-degree rotation with sub-degree accuracy through its magnetic encoder technology, which measures angular displacement without mechanical potentiometers prone to wear. The bus servo architecture allows daisy-chaining multiple motors through a single communication line, significantly reducing wiring complexity in multi-joint robotic systems while maintaining synchronized motion control and individual torque management.

The motor delivers 20kg.cm (approximately 1.96 Nm) of continuous torque at 106 RPM, providing the mechanical power necessary for load-bearing applications such as robotic arm joints, humanoid robot actuators, and industrial automation mechanisms. The integrated magnetic encoder provides absolute position data at high resolution, eliminating the need for external position sensors and reducing system cost while improving reliability. The bus servo protocol enables advanced features including programmable speed profiles, torque limiting, and multi-motor synchronization, making it ideal for complex motion control applications requiring coordinated multi-axis movement.

Key Specifications

Specification	Details
Product Type	Bus Servo Motor with Integrated Magnetic Encoder
Brand	Waveshare
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Torque Output	20 kg.cm (1.96 Nm) continuous rated torque
Speed Rating	106 RPM at rated voltage
Rotation Range	360 degrees continuous rotation with feedback
Encoder Resolution	High-precision magnetic encoder with sub-degree accuracy
Communication Protocol	Bus servo protocol with daisy-chain capability
Operating Voltage	5-12V DC (typical 6V or 12V configurations)

Key Features

• 360-Degree Continuous Rotation: Full rotation capability with integrated magnetic encoder feedback, eliminating mechanical stop limitations of conventional servos and enabling applications requiring unlimited rotational motion
• 20kg.cm High Torque Output: Delivers substantial mechanical power for load-bearing robotic joints, industrial actuators, and heavy-duty automation mechanisms without requiring external gearboxes
• High-Precision Magnetic Encoder: Integrated absolute position sensor provides sub-degree angular accuracy across full 360-degree range, enabling closed-loop position control and eliminating calibration drift
• Bus Servo Architecture: Supports daisy-chain communication topology allowing multiple motors to be controlled through a single serial line, reducing wiring complexity and system cost in multi-joint applications
• 106 RPM High-Speed Operation: Rapid motor response time suitable for dynamic motion control, quick positioning, and time-critical robotic applications
• Programmable Motion Control: Bus protocol enables speed ramping, acceleration profiles, torque limiting, and synchronized multi-motor coordination for advanced motion algorithms

Applications and Use Cases

• Robotic Arm Joints: Ideal for 6-DOF robotic manipulators and industrial robot arms where each joint requires high torque, precise positioning feedback, and synchronized multi-axis motion control for manufacturing and assembly tasks
• Humanoid Robot Actuators: Perfect for bipedal or quadrupedal robot development where continuous rotation capability and integrated feedback enable realistic joint movement simulation and dynamic balance control
• Automated Turntable Systems: Suitable for precision positioning tables, camera pan-tilt mechanisms, and automated inspection systems requiring 360-degree continuous rotation with accurate angular feedback
• Industrial Automation Mechanisms: Applicable to conveyor systems, automated sorting equipment, and material handling robots where high torque and position feedback enable reliable production automation
• Educational Robotics Platforms: Excellent for university robotics laboratories and STEM education programs teaching advanced servo control, multi-axis coordination, and industrial automation principles

How to Use

To integrate the Waveshare 20kg.cm Bus Servo Motor into your robotic system, first establish electrical connections by connecting the power supply (typically 6V or 12V DC based on your configuration) to the motor's power terminals, ensuring proper polarity to prevent damage. Connect the communication line to your microcontroller or servo controller board that supports the bus servo protocol, typically using a three-pin connector for power, ground, and serial data. Configure the motor's bus ID and communication parameters using the provided software utilities or your controller's configuration interface before connecting multiple motors in a daisy-chain topology.

Once electrical connections are established, initialize the servo communication by sending configuration commands to set speed profiles, acceleration parameters, and torque limits according to your application requirements. Use the integrated magnetic encoder feedback to implement closed-loop position control, continuously monitoring the motor's angular position and adjusting drive signals to maintain desired orientation. For multi-motor applications, implement synchronization algorithms that coordinate motion across multiple servos, ensuring smooth coordinated movement in robotic arms or complex automation systems. Always test motion sequences at reduced speed and torque settings before full-power operation to validate system behavior and prevent mechanical damage.

Frequently Asked Questions

What is the difference between this bus servo and a standard RC servo motor?

This Waveshare bus servo differs fundamentally from standard RC servos in three critical ways: First, it supports 360-degree continuous rotation instead of 180-degree limited rotation, enabling applications requiring full rotational motion. Second, it features an integrated high-precision magnetic encoder providing absolute position feedback across the entire rotation range, compared to RC servos with limited-range potentiometers. Third, it uses a bus communication protocol allowing multiple motors to be controlled through a single serial line with synchronized motion control, whereas RC servos require individual PWM signals for each motor. These features make bus servos superior for complex robotic systems requiring multi-axis coordination and precise position feedback.

Can I control multiple Waveshare bus servos simultaneously?

Yes, the bus servo architecture is specifically designed for multi-motor control. You can daisy-chain multiple Waveshare 20kg.cm servos through a single serial communication line by assigning each motor a unique bus ID. This topology significantly reduces wiring complexity compared to controlling multiple standard servos, which would require individual PWM signals for each motor. Your microcontroller sends commands addressing specific motor IDs, and each servo responds independently while sharing the same communication line. This enables synchronized motion control where you can coordinate movement across multiple joints simultaneously, essential for robotic arms and humanoid robots.

What is the encoder resolution and how does it affect positioning accuracy?

The integrated magnetic encoder provides high-precision angular feedback with sub-degree accuracy across the full 360-degree rotation range. This high resolution enables closed-loop position control where the servo continuously compares actual position against commanded position and adjusts motor drive accordingly. The sub-degree accuracy means you can command and verify positioning to fractions of a degree, critical for robotic applications requiring precise joint angles. Unlike mechanical potentiometers in standard servos that degrade with wear and require periodic recalibration, the magnetic encoder provides consistent absolute position data throughout the motor's operational life, ensuring long-term reliability in production automation systems.

What voltage should I use to operate this servo motor?

The Waveshare 20kg.cm Bus Servo Motor typically operates at either 6V or 12V DC depending on your specific module configuration. Check the product documentation for your particular unit to determine the rated voltage. Operating at the correct voltage is critical for achieving specified torque output and speed performance. Using voltage below the rated specification will reduce torque and speed, potentially causing the motor to stall under load. Using voltage significantly above the rated specification can damage internal electronics and shorten motor lifespan. Always verify your power supply voltage matches the motor's rating before connecting, and use a regulated DC power supply to maintain stable voltage during operation.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy Waveshare 20kg.cm Bus Servo Motor, 106PRM High Speed, Large Torque, With 360 Degrees High Precision Magnetic Encoder Online in India

Purchase the Waveshare 20kg.cm Bus Servo Motor, 106PRM High Speed, Large Torque, With 360 Degrees High Precision Magnetic Encoder online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Waveshare 20kg.cm Bus Servo Motor, 106PRM High Speed, Large Torque, With 360 Degrees High Precision Magnetic Encoder with fast