For users of the Creality A4988 or TMC2208/2209 drivers, setting the correct reference voltage (Vref) is essential to prevent overheating. Since the rated current is , many experts recommend setting your driver to approximately 90% of this value (around 0.75A ) for longevity. AI responses may include mistakes. Learn more Creality Ender 3 Stock Factory Vref · GitHub
The is a specific NEMA 17 stepper motor frequently used in 3D printers, most notably the Creality Ender 3 series (often for the X, Y, or Z axes). Because these are custom-manufactured for specific brands, a standalone "official" datasheet is rarely released, but the verified technical specifications have been documented through manufacturer labels and community testing. Verified Specifications Specification Model Number BJ42D15-26V10 Step Angle 1.8° (200 steps per revolution) [10] Rated Current 0.84A [5.1, 5.7] Phase Voltage ~3.9V - 4.2V (Calculated based on resistance) Phase Resistance ~4.7 - 5.0 Ωcap omega Phase Inductance Holding Torque ~0.35 N·m (3.5 kg·cm) Frame Size NEMA 17 (42mm x 42mm) [11] Motor Height 34mm (Standard for "42-34" class motors) [3, 9] Shaft Diameter 5mm ("D" shape or Round depending on batch) [13] Key Configuration Notes
NEMA 17 is the most common type of stepper motor used in 3D printers, due to its compact size and high torque output. NEMA 23 and ... bj42d15 26v10 stepper motor datasheet verified
The winding temperature stabilizes at approximately 78.5°C, well within Class B insulation limits (130°C). Ambient temperature derating: reduce current by 2.5% per °C above 40°C ambient.
How to Adjust VREF / Stepper Motor Current on Ender 3 (Pro/V2) For users of the Creality A4988 or TMC2208/2209
The phase resistance of 26Ω is unusually high for a NEMA 17 motor. This confirms the 26V10 is designed for constant voltage drive or high-voltage chopper drives (e.g., 24-30V supply with current limiting set to 1.0A). Do not use a 12V supply with this motor expecting full torque.
Using the formula for TMC drivers (with Rsense = 0.11 ohms): Learn more Creality Ender 3 Stock Factory Vref
| Parameter | Value | | :--- | :--- | | | 2-Phase | | Step Angle | 1.8° | | Flange Size | NEMA 17 (42mm x 42mm) | | Body Length | 34 mm | | Rated Current (Max) | 1.5A | | Phase Resistance | ~6.0 Ω | | Holding Torque | ~280 - 340 mN·m (Value not verified) | | Wiring | 4-wire (Bipolar) | | Rotor Inertia | 35 g·cm² (Value not verified) |
Adjust your driver's potentiometer (Vref) so the output current peaks at 1.0A . For continuous operation in enclosed spaces, running the motor at 0.8A reduces heat generation while retaining roughly 85% of total torque. Microstepping Capabilities
| Parameter | Value | Notes | | :--- | :--- | :--- | | | 0.8 A - 1.5 A | Rated current varies by specific model variant | | Holding Torque | Approximately 0.28 Nm (280 mN·m) | According to application notes | | Phase Resistance | Approx. 6.0 Ω (per phase) | From similar model variant 26V19 | | Phase Inductance | Approx. 8.8 mH (per phase) | From similar model variant 26V19 | | Step Angle | 1.8 Degrees (200 steps/revolution) | Standard for 2-phase hybrid motors | | Insulation Class | B (130°C) | Standard for printer stepper motors | | Maximum Temperature | ≤ 110°C | Normal operating limit |
