Pololu 2297 / 2299 Sanyo Pancake Stepper Motor: Bipolar, 200 Steps/Rev
Pololu 2297 / 2299 Sanyo Pancake Stepper Motor: Bipolar, 200 Steps/Rev
Pololu 2297 / 2299 Sanyo Pancake Stepper Motor: Bipolar, 200 Steps/Rev
The Pololu 2297 / 2299 Sanyo Pancake Stepper Motor is a compact bipolar NEMA 17 stepper motor with 200 steps per revolution (1.8 degrees per step), engineered for space-constrained robotics and automation projects. Professional engineers and hobbyists use this motor in 3D printers, CNC machines, automated camera systems, and precision positioning applications where axial depth is critical. This pancake design solves the challenge of integrating stepper motors into compact enclosures without sacrificing torque or precision, delivering reliable performance in demanding industrial and consumer electronics applications.
Product Overview
The Pololu 2297 / 2299 Sanyo Pancake Stepper Motor operates on bipolar stepper motor principles, requiring a dedicated stepper driver circuit to energize its four coil windings in precise sequences. Unlike unipolar motors, bipolar designs deliver superior torque efficiency by utilizing both positive and negative current flow through each coil phase, resulting in 30-40% more holding torque per unit volume. The motor's 200 steps per revolution specification enables 1.8-degree angular resolution per step, or 0.9 degrees when microstepping is applied through compatible drivers, providing smooth motion control suitable for precision applications requiring high repeatability.
The pancake form factor distinguishes this motor by minimizing axial length while maintaining the standard NEMA 17 mounting footprint and shaft diameter. This geometry makes it ideal for 3D printer Z-axis assemblies, compact linear actuators, and space-limited automation systems where traditional tall stepper motors create design constraints. The Sanyo manufacturing pedigree ensures consistent quality, reliable coil insulation, and predictable performance across temperature ranges from 0 to 50 degrees Celsius, making this motor suitable for both laboratory prototyping and production-grade equipment.
Key Specifications
| Specification | Details |
| Product Type | Bipolar Stepper Motor, NEMA 17 Pancake |
| Brand | Sanyo 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 |
| Steps Per Revolution | 200 steps (1.8 degrees per step) |
| Motor Type | Bipolar stepper, 4-wire configuration |
| Holding Torque | Approximately 3.2 kg-cm at rated current |
| Rated Current | 1.5 A per phase |
| Coil Resistance | 2.8 Ohms per phase |
| Axial Length | 20 mm (pancake profile) |
| Shaft Diameter | 5 mm with 2 mm keyway |
| Operating Temperature | 0 to 50 degrees Celsius |
Key Features
- Compact Pancake Design: 20 mm axial length enables integration into space-constrained assemblies like 3D printer carriages and compact automation systems without sacrificing NEMA 17 torque performance
- Bipolar Configuration: Four-wire design delivers superior torque efficiency compared to unipolar motors, enabling 30-40% more holding force per unit current consumption
- Precision Stepping: 200 steps per revolution (1.8 degrees) provides smooth motion; microstepping drivers reduce this to 0.9 degrees per step for ultra-smooth operation
- Sanyo Quality Manufacturing: Proven coil insulation, consistent performance across temperature ranges, and reliable operation in production environments with minimal maintenance requirements
- Standard NEMA 17 Mounting: Compatible with existing NEMA 17 mechanical interfaces, pulleys, and coupling systems used in 3D printers and CNC equipment
- Low Inertia Rotor: Lightweight rotor design enables rapid acceleration and deceleration, ideal for applications requiring quick directional changes or speed adjustments
Applications and Use Cases
- 3D Printer Z-Axis: The pancake form factor is specifically designed for Prusa i3 and similar 3D printers where vertical space above the build platform is limited, providing precise layer height control with minimal mechanical interference
- CNC Router Spindle Positioning: Compact stepper motors drive tool changers and spindle height adjustment mechanisms in small-format CNC machines where turret space is restricted
- Automated Camera Pan-Tilt Systems: Lightweight construction enables smooth panoramic photography rigs and surveillance systems that require rapid directional control without excessive power consumption
- Precision Labware Dispensers: Medical and laboratory automation equipment uses these motors for accurate liquid handling and sample positioning with the torque density required for syringe pumps and microplate handlers
- Compact Linear Actuators: Stepper-driven lead screws and belt drives in laboratory automation, environmental chambers, and prototype testing equipment benefit from the space-saving pancake profile
- Robotic Joint Actuators: Educational and research robotics platforms integrate these motors into joint drives where compact form factors enable multi-axis articulation within size constraints
How to Use
The Pololu 2297 / 2299 stepper motor requires a dedicated bipolar stepper driver circuit such as the Pololu DRV8825, A4988, or equivalent to operate. Connect the motor's four wires to the driver outputs following the correct phase sequence: typically coil A and coil B, with each coil receiving alternating current pulses from the driver. The motor's rated current of 1.5 A per phase should be configured in your driver using the current limiting potentiometer; set this carefully to avoid overheating while maintaining adequate torque for your application. Supply power to the driver using a regulated 12V to 24V DC source with sufficient current capacity (minimum 3-4 A for typical applications) and connect your microcontroller's step and direction pins to the driver to command motor movement.
When integrating this motor into mechanical assemblies, ensure the shaft coupling or pulley is properly aligned to prevent radial stress on the motor bearings. The pancake geometry concentrates load on a short bearing span, so use flexible couplings or precision-machined shaft adapters to maintain concentricity. In 3D printer applications, mount the motor vertically with the shaft pointing upward, ensuring the lead screw or threaded rod is perfectly vertical to avoid binding. For optimal performance, implement microstepping in your firmware (typically 16x or 32x microstepping) to reduce vibration and noise while improving positional accuracy beyond the motor's native 1.8-degree step resolution.
Frequently Asked Questions
What is the difference between the Pololu 2297 and 2299 models?
The Pololu 2297 and 2299 are functionally identical Sanyo pancake stepper motors with the same electrical specifications, torque ratings, and mechanical dimensions. The model number difference typically reflects different manufacturing batches or slight variations in connector types. Both are fully compatible with standard bipolar stepper drivers and provide identical performance in your application.
Can I use this motor with a unipolar stepper driver?
No, this is a bipolar motor and requires a bipolar stepper driver. Unipolar drivers are designed for motors with center-tapped coils and cannot properly energize the four-wire bipolar configuration. Using an incorrect driver will result in motor malfunction or failure. Always verify your driver specifications match the motor's bipolar requirements.
What microstepping resolution should I use for 3D printing?
Most 3D printer firmware supports 16x or 32x microstepping for the Z-axis. At 16x microstepping, each microstep equals 0.1125 degrees (1.8 divided by 16), enabling layer heights as fine as 0.05 mm with a standard 8 mm pitch lead screw. Higher microstepping (32x) reduces vibration further but increases driver complexity and heat generation. Start with 16x microstepping and adjust based on your printer's performance and noise characteristics.
How do I calculate the holding torque for my application?
This motor provides approximately 3.2 kg-cm holding torque at rated current (1.5 A per phase). To determine if this is sufficient, calculate the load torque required to move your mechanism: torque equals force times radius (in centimeters). For example, lifting a 1 kg load with a 4 cm radius pulley requires 4 kg-cm of torque, which exceeds this motor's holding torque. Add a safety factor of 1.5x to 2x for dynamic loads and friction losses.
What is the maximum speed this motor can achieve?
Maximum speed depends on your driver voltage and current limiting configuration. At 12V with standard current limiting, expect 400-600 RPM maximum speed. At 24V, speeds can reach 800-1200 RPM. However, torque decreases significantly at high speeds due to back-EMF voltage limiting. For 3D printers, typical Z-axis speeds are 10-50 RPM for smooth operation; faster speeds reduce positional accuracy and increase vibration.
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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Buy Pololu 2297 / 2299 Sanyo Pancake Stepper Motor: Bipolar, 200 Steps/Rev Online in India
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