Bj42d15 26v10 Stepper Motor Datasheet -

VREF=Imax×8×Rsense×0.7cap V sub cap R cap E cap F end-sub equals cap I sub m a x end-sub cross 8 cross cap R sub s e n s e end-sub cross 0.7

When configuring your stepper driver, you must set the current limit ( Imaxcap I sub m a x end-sub

| Wire Color | Function | | :--- | :--- | | Red | Phase A+ | | Blue | Phase A- | | Green | Phase B+ | | Black | Phase B- |

The BJ42D15-26V10 typically features a 4-wire bipolar configuration. Understanding the wire pairings is critical to prevent damage to your stepper driver. Phase A: Black (A+) and Green (A-) Phase B: Red (B+) and Blue (B-) bj42d15 26v10 stepper motor datasheet

Understanding its precise technical parameters is critical for calculating stepper driver VREF voltages, preventing skipped steps, and avoiding motor overheating. Technical Specification Overview

Note: Wire color configurations can vary by factory supplier. Always verify winding pairs using a multimeter before powering your driver. Identifying the Pairs with a Multimeter

The BJ42D15-26V10 belongs to the 42mm (NEMA 17) frame size family, balancing compact dimensions with reliable holding torque. Electrical Attributes 12V – 24V DC (Typical operational range) VREF=Imax×8×Rsense×0

At 1.0 Amps, this small motor will get warm (around 50°C - 60°C) after extended use. This is completely normal and safe (the insulation class is 130°C). However, if you accidentally set your driver to 2.0A, the motor will overheat, the magnets will demagnetize, and the motor will permanently lose torque.

Drive this motor using a 24V – 28V DC supply and a constant-current driver set to 1.0A (RMS). Do not attempt to force high speeds beyond 600 RPM due to high inductance. Use it for precision positioning at low to medium speeds, and it will provide reliable, cool, and accurate service for years.

Compare it to (e.g., in terms of torque). Electrical Attributes 12V – 24V DC (Typical operational

| Parameter | Value | | :--- | :--- | | | NEMA 17 (42mm x 42mm) | | Step Angle | 1.8° (200 steps/revolution) | | Phase | 2-phase bipolar | | Rated Voltage | 26V | | Rated Current | 0.8A - 1.5A (depending on variant, 26V10 variant rated for 0.8A) | | Holding Torque | ~0.2 - 0.4 N·m (28-57 oz·in) | | Inductance per Phase | 1.4 mH (typical, from Y1W01E variant datasheet) | | Resistance per Phase | 1.4 Ω (typical) | | Number of Leads | 4 | | Rotor Inertia | 35 g·cm² (typical) | | Body Length | 34mm |

Based on its design as a "42-34" series motor, the following technical profile applies: Step Angle : 1.8° (200 steps per revolution). Rated Current : 0.84A per phase. Phase Resistance Holding Torque : 0.4 N.m (approx. 2.86 kg.cm). Nominal Voltage

Usually 3.3V – 4.8V (calculated based on current and resistance), though it operates on 12V/24V systems via current-limiting drivers Frame Size: NEMA 17 (42 x 42 mm) Body Length: 34 mm Shaft Diameter: 5 mm ("D" shape) Weight: ~215g Key Operational Features Creality Ender 3 Stock Factory Vref · GitHub

Use power resistors in series with a higher voltage supply. For 26V operation, drive directly. For 12V operation, you need no resistors (since 26 Ohms limits current to 0.46A on 12V – safe but low torque).