Pololu 2278 / 2279 NEMA 17 Sanyo Pancake Stepper Motor with Encoder: Bipolar, 200 Steps/Rev
Pololu 2278 / 2279 NEMA 17 Sanyo Pancake Stepper Motor with Encoder: Bipolar, 200 Steps/Rev
Pololu 2278 / 2279 NEMA 17 Sanyo Pancake Stepper Motor with Encoder: Bipolar, 200 Steps/Rev
The Pololu 2278/2279 NEMA 17 Sanyo Pancake Stepper Motor is a compact bipolar stepper motor featuring integrated quadrature encoder feedback for closed-loop position verification and motion control applications. This ultra-low-profile motor delivers 200 steps per revolution with precise 1.8-degree step angles, making it ideal for robotics, CNC machinery, 3D printers, and automation systems requiring both accurate positioning and real-time position feedback. The integrated encoder eliminates the need for external feedback sensors, reducing system complexity while enabling advanced motion algorithms and error detection in demanding industrial and research environments.
Product Overview
The Pololu 2278/2279 NEMA 17 Sanyo Pancake Stepper Motor represents a breakthrough in compact motor design by combining the proven NEMA 17 frame size with an ultra-thin pancake profile that measures just 20mm in length. This motor operates on bipolar stepper motor principles, requiring a 4-wire configuration with alternating current pulses to create precise rotational steps. The integrated quadrature encoder provides two-channel feedback with 64 counts per revolution, enabling microcontroller-based position verification and closed-loop control algorithms. Unlike traditional stepper motors that rely solely on step counting, this encoder feedback allows real-time detection of missed steps, stalls, or mechanical binding, critical for applications where positional accuracy cannot be compromised.
The Sanyo manufacturing heritage ensures exceptional reliability and consistent performance across temperature ranges and extended operational cycles. With a holding torque of approximately 0.4 Nm and dynamic torque characteristics suitable for moderate-load applications, this motor excels in space-constrained environments such as robotic arms, precision XY tables, automated laboratory equipment, and compact 3D printing systems. The low-profile design reduces overall system height while maintaining the torque and step resolution expected from NEMA 17 class motors, making it the preferred choice for engineers balancing performance requirements against physical space limitations.
Key Specifications
| Specification | Details |
| Product Type | Bipolar Stepper Motor with Integrated Encoder |
| Brand | Pololu / Sanyo |
| 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 |
| NEMA Frame Size | NEMA 17 (42.3mm x 42.3mm mounting face) |
| Motor Length | 20mm (Pancake ultra-low profile) |
| Steps per Revolution | 200 steps (1.8 degrees per step) |
| Wiring Configuration | 4-wire bipolar stepper motor |
| Holding Torque | Approximately 0.4 Nm |
| Encoder Type | Quadrature encoder with 64 counts per revolution |
| Encoder Channels | 2-channel (A and B phase) |
| Operating Voltage Range | Typical 12V DC stepper driver compatible |
Key Features
- Ultra-compact pancake form factor at just 20mm length, enabling integration into space-constrained robotic and automation designs without sacrificing NEMA 17 performance specifications
- Integrated quadrature encoder with 64 counts per revolution provides real-time position feedback, enabling closed-loop control algorithms and immediate detection of missed steps or mechanical faults
- Bipolar stepper configuration with 200 steps per revolution delivers 1.8-degree step resolution, providing smooth motion and precise positioning for multi-axis CNC and 3D printing applications
- Sanyo manufacturing quality ensures consistent torque delivery, extended operational lifespan, and reliable performance across industrial temperature ranges and extended duty cycles
Applications and Use Cases
- Robotic arm joints and articulated manipulators requiring compact motors with positional feedback for accurate gripper control and pick-and-place operations in manufacturing automation
- Precision XY and Z-axis stages in laboratory automation, microscopy systems, and analytical instruments where space constraints demand ultra-low-profile motors with encoder-based position verification
- 3D printer extruder and bed positioning systems utilizing the encoder feedback to detect filament jams, bed leveling errors, and mechanical binding before print quality degradation occurs
- CNC milling machines and laser engraving systems requiring closed-loop stepper motor control to compensate for mechanical backlash and ensure dimensional accuracy across extended production runs
How to Use
To implement the Pololu 2278/2279 NEMA 17 Pancake Stepper Motor with encoder feedback, begin by connecting the four stepper motor wires to your bipolar stepper driver (such as DRV8825, A4988, or equivalent) following the color-coded wiring diagram provided in the datasheet. The encoder channels (typically labeled A and B) connect directly to digital input pins on your microcontroller, configured as interrupt-driven inputs to capture quadrature transitions. Configure your stepper driver for appropriate microstepping resolution (full-step, half-step, quarter-step, or sixteenth-step) based on your smoothness and torque requirements, then program your microcontroller to generate step and direction pulses at frequencies matching your desired motor speed while simultaneously monitoring encoder counts to verify actual motor rotation.
Implement closed-loop control by comparing encoder pulse counts against expected step counts; if discrepancies exceed your tolerance threshold, trigger error handling routines such as reducing motor speed, increasing current to the stepper coils, or alerting the operator to mechanical binding. Mount the motor using the standard NEMA 17 four-point mounting pattern with M3 fasteners, ensuring the ultra-thin pancake profile aligns with your mechanical design constraints. For optimal performance, maintain stepper driver current settings between 1.5A and 2.5A per phase, monitor motor temperature during extended operation, and validate encoder signal integrity on an oscilloscope before deploying in production environments.
Frequently Asked Questions
What is the difference between this pancake stepper motor and standard NEMA 17 motors?
The pancake design reduces axial length from typical 40-50mm to just 20mm, making it ideal for space-constrained applications like robotic arms and compact automation systems. This comes without sacrificing torque or step resolution, though the reduced length may affect heat dissipation slightly. The integrated encoder is the key differentiator, providing real-time position feedback that standard NEMA 17 motors lack.
How does the quadrature encoder improve motor performance?
The quadrature encoder provides 64 counts per revolution, allowing your microcontroller to detect actual motor rotation in real-time. This enables closed-loop control where you can immediately identify if the motor has stalled, missed steps, or encountered mechanical resistance. Unlike open-loop stepper systems that assume every pulse results in a step, encoder feedback lets you implement error correction and adaptive control algorithms, dramatically improving reliability in critical applications.
What microcontroller platforms are compatible with this motor?
Any microcontroller with GPIO pins (Arduino, Raspberry Pi, STM32, PIC, etc.) can control this motor. You need four digital output pins for the stepper driver (STEP, DIR, ENABLE, and GND) and two digital input pins for the encoder channels (A and B). Most stepper drivers like DRV8825 or A4988 interface directly with standard 5V logic, making integration straightforward across popular development platforms.
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 Tech Depot
- 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
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- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy Pololu 2278 / 2279 NEMA 17 Sanyo Pancake Stepper Motor with Encoder: Bipolar, 200 Steps/Rev Online in India
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