Pololu 3426 FEETECH High-Torque Servo FS5115M
Pololu 3426 FEETECH High-Torque Servo FS5115M
Pololu 3426 FEETECH High-Torque Servo FS5115M
The Pololu 3426 FEETECH High-Torque Servo FS5115M is a professional-grade continuous rotation servo motor delivering 15 kg-cm of torque at 6V, engineered for demanding robotics and automation applications requiring sustained mechanical force. Roboticists, industrial automation engineers, and hobbyists rely on this servo for heavy-load applications including robotic arms, mobile robot drive systems, and precision positioning mechanisms where standard servos fall short. This high-torque servo solves the critical challenge of achieving reliable, continuous motion under load while maintaining compact form factor and cost-effectiveness compared to industrial actuators.
Product Overview
The FEETECH FS5115M operates on a brushless DC motor architecture with integrated metal gearing, delivering consistent high torque output across extended operational periods without performance degradation. Unlike standard plastic-geared servos that slip under sustained load, the FS5115M employs durable metal gear trains with precise tolerances, enabling it to handle continuous operation in robotic drive trains, conveyor systems, and mechanical load applications. The servo accepts standard PWM control signals compatible with microcontroller platforms like Arduino, Raspberry Pi, and PLC systems, making integration straightforward for both prototyping and production environments.
The FS5115M features a metal servo horn interface accepting standard servo linkages, sealed bearing construction protecting internal components from dust and debris, and a compact 40.8 x 20 x 38.2mm footprint enabling installation in space-constrained robotic platforms. Operating voltage range of 4.8V to 6V provides flexibility for battery-powered systems, while the 0.14 second per 60-degree response time ensures rapid actuation for time-sensitive applications. Built-in feedback potentiometer enables position verification and closed-loop control implementation for precision applications requiring repeatability.
Key Specifications
| Specification | Details |
| Product Type | High-Torque Continuous Rotation Servo Motor |
| Brand | FEETECH via Pololu |
| 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 | 15 kg-cm at 6V nominal |
| Operating Voltage | 4.8V to 6V DC |
| Speed | 0.14 seconds per 60 degrees at 6V |
| Gear Type | Metal gear train with sealed bearings |
| Control Signal | Standard PWM 1000-2000 microsecond pulse width |
| Physical Dimensions | 40.8 x 20 x 38.2 mm |
| Weight | Approximately 60 grams |
Key Features
- High-torque metal gear construction delivering 15 kg-cm sustained force for heavy-load robotic applications without slip or performance loss
- Sealed bearing design protecting internal mechanisms from environmental contamination, dust, and moisture in outdoor or industrial deployments
- Standard PWM control interface compatible with Arduino, Raspberry Pi, microcontroller boards, and industrial PLC systems for seamless integration
- Compact 40.8 x 20 x 38.2mm form factor enabling installation in space-constrained robotic platforms and mobile systems
- Integrated position feedback potentiometer enabling closed-loop control and position verification for precision applications
- Wide voltage operating range 4.8V to 6V providing flexibility for battery-powered systems and power supply configurations
- Rapid 0.14 second per 60-degree response time ensuring quick actuation for time-sensitive robotic movements and automation sequences
Applications and Use Cases
- Robotic arm drive systems requiring sustained torque for lifting and positioning payloads up to 15 kg-cm in articulated robot designs
- Mobile robot locomotion platforms using dual FS5115M servos for differential drive configurations in wheeled autonomous robots
- Industrial automation conveyor systems and material handling mechanisms requiring continuous rotation under load
- Precision positioning mechanisms in CNC systems, 3D printer extruder drives, and automated manufacturing equipment
- Humanoid and quadruped robot joint actuation requiring synchronized high-torque movement across multiple servo channels
- Camera pan-tilt systems and surveillance equipment requiring smooth continuous rotation with precise speed control
How to Use
Connect the FS5115M servo to your control system by attaching the three-wire connector to your microcontroller or servo controller board. The red wire connects to positive voltage supply (4.8V to 6V), black wire to ground, and yellow/white wire to a PWM-capable digital output pin. Configure your microcontroller to generate PWM signals with 1000-2000 microsecond pulse widths at 50Hz frequency using standard servo control libraries. For Arduino platforms, use the Servo library; for Raspberry Pi, utilize GPIO PWM or dedicated servo control libraries like RPi.GPIO or pigpio.
Attach the servo horn to your mechanical linkage using the included fasteners, ensuring proper alignment and minimal play in the connection. For continuous rotation applications, send PWM values of 1500 microseconds to stop the servo, values below 1500 for counterclockwise rotation, and values above 1500 for clockwise rotation. Monitor the integrated potentiometer feedback by reading the analog voltage on the feedback pin to verify actual position and implement closed-loop control algorithms if your application requires position accuracy. Allow adequate cooling time during extended continuous operation, as sustained high-torque output generates heat; consider adding a small heatsink or ensuring adequate airflow in enclosures.
Frequently Asked Questions
What is the maximum continuous torque rating of the FS5115M servo?
The Pololu 3426 FEETECH FS5115M delivers 15 kg-cm of torque at 6V nominal supply voltage. This represents the maximum sustained torque output under continuous operation. Peak torque may reach slightly higher values during brief acceleration phases, but sustained loads should not exceed 15 kg-cm to prevent motor stalling and thermal damage. For applications requiring higher torque, consider using multiple servos in parallel mechanical arrangements or upgrading to industrial-grade actuators.
Can the FS5115M operate at voltages below 4.8V or above 6V?
The FS5115M is rated for 4.8V to 6V operating range. Operating below 4.8V reduces torque output proportionally and may cause servo jitter or control instability. Operating above 6V risks permanent damage to internal electronics and motor windings. If your power supply delivers 7.2V or higher, use a voltage regulator to step down to 6V maximum. For battery-powered applications, a fully-charged 5-cell NiMH battery pack delivering 6V is ideal; monitor voltage as battery depletes to maintain consistent performance.
How do I implement closed-loop position control with the FS5115M?
The FS5115M includes an integrated potentiometer feedback pin that outputs analog voltage proportional to servo position. Connect this feedback pin to an analog input on your microcontroller and read the voltage using the ADC converter. Map the analog reading to servo position in degrees, then compare actual position to desired position and adjust PWM output accordingly. Implement a PID control loop adjusting proportional, integral, and derivative gains to minimize position error and prevent oscillation. This enables precise positioning applications where standard open-loop PWM control lacks accuracy.
What is the response time and acceleration capability of this servo?
The FS5115M achieves 0.14 seconds per 60-degree rotation at 6V supply voltage, translating to approximately 429 degrees per second maximum angular velocity. Acceleration from standstill to maximum speed occurs within milliseconds due to brushless motor design. This rapid response makes the servo suitable for dynamic robotic applications requiring quick actuation. However, actual response time depends on load inertia and friction; heavier loads will exhibit slower acceleration despite the servo's inherent speed capability.
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.
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- Returns: 7-day return policy on manufacturing defects only
Buy Pololu 3426 FEETECH High-Torque Servo FS5115M Online in India
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