With Rsense = 0.11Ω, the .
BJ42D15-26V10 is a NEMA 17 stepper motor frequently used by Creality in their 3D printers, specifically for the Y and Z axes. While detailed official datasheets can be difficult to find, technical specifications from manufacturer Keli Motor and translated sources reveal its core operational parameters. Core Technical Specifications Form Factor : NEMA 17 (42 x 42 mm). Step Angle : 1.8° (200 steps per revolution). Rated Current
Understanding the naming convention is the first step to unlocking the motor’s capabilities:
| Parameter | Value / Rating | Notes / Source | | :--- | :--- | :--- | | | BJ42D15-26V10 | Part of the broader Keli BJ42D series. | | Phase | 2-Phase | Hybrid stepper motor with a bipolar winding configuration. | | Step Angle | 1.8° | Standard for most NEMA 17 sized motors, yielding 200 steps/revolution. | | Flange Size | 42mm x 42mm | Physical mounting pattern of the front flange. | | Motor Length (L) | 34mm | The length of the steel motor housing (excluding shaft). | | Rated Current (Max) | 0.8A to 1.5A | Varies by application. Official rating: 0.8A . Peak: 1.5A. | | Body Length Identifier | 15 | In the BJ42D series, "15" represents the 34mm stack length. | | Shaft Diameter | 5mm (Common) | Standard for NEMA 17 motors; check your pulley's set screw size. | | Weight | Approx. 220-250g | Typical for a 34mm length stepper motor. | | Typical Operating Voltage | 12V–24V | Often powered by 5V or 24V signals in systems like the TOOCA Laser L1. | | Temperature Rise (Winding) | 60.6°C | Measured under load; lower heat generation is a key feature. | bj42d15 26v10 stepper motor datasheet exclusive
In the realm of industrial automation, robotics, and precision machinery, stepper motors have become an indispensable component. One such stepper motor that has garnered significant attention is the BJ42D15-26V10. This blog post aims to provide an in-depth analysis of the BJ42D15-26V10 stepper motor datasheet, highlighting its key features, specifications, and applications.
align closely with other "BJ42D15" variants used for X, Y, and Z-axis movements: : 1.8∘1.8 raised to the composed with power (standard 200 steps per full rotation).
Because of its relatively low inductance (4.5 mH), the BJ42D15-26V10 excels at maintaining torque at higher RPMs compared to "high-torque" 60mm motors. It is ideal for the where rapid travel speeds are required. Heat Dissipation With Rsense = 0
Because the resistance is 26Ω per phase, at 1.0A, the power dissipation is:
The motor utilizes a standard 4-wire bipolar configuration. Understanding the internal coil pairs is essential for correct driver connection (e.g., A4988, TMC2209). Pin Number Wire Color Phase Assignment
: Specifies the motor length and internal rotor/stator configuration (roughly 34 mm total height). Core Technical Specifications Form Factor : NEMA 17
Because stack height is only 15mm, the rotor is light. This motor can accelerate from 0 to 3000 RPM in less than 15 milliseconds using a 24V driver with 32-microstep interpolation. It is perfect for the Z-axis or vacuum nozzle rotation in light pick-and-place machines.
: 0.84A per phase. Note that many community sources incorrectly estimate this at 1.5A; using the correct 0.84A is vital for setting accurate VREF on stepper drivers. Holding Torque : 2.86 kg·cm (approximately 0.28 N·m). Input Voltage : Maximum 24V DC. Dimensions : Height of 34mm (often referred to as a "42-34" motor).