Bj42d15 26v10 Stepper Motor Datasheet !exclusive! [ No Login ]

Medical devices, precise laboratory automation, CNC routers, and consumer-grade 3D printers. 2. Key Technical Specifications

Typical applications: 3D printers, small CNC machines, medical pumps, office automation.

5mm (usually "D-shape" for secure pulley mounting) Mounting Hole Pattern: 31mm x 31mm (using M3 screws) Wiring and Phase Configuration bj42d15 26v10 stepper motor datasheet

Provides high holding torque for articulated robotic arms. Integration Tips

In practice, when the motor is driven at its rated current, surface temperature can reach around 60.6°C under normal operation, which is well within the insulation class (typically Class B or higher) of these motors. The acceptable winding temperature under continuous operation is typically up to 80°C, but this can be confirmed by a product’s insulation rating. 5mm (usually "D-shape" for secure pulley mounting) Mounting

VREF=Irun×8×Rsense=0.672×8×0.1≈0.54VVREF equals cap I sub run end-sub cross 8 cross cap R sub sense end-sub equals 0.672 cross 8 cross 0.1 is approximately equal to 0.54 V

| Parameter | Value | Unit | | :--- | :--- | :--- | | | 1.8 | Degrees | | Step Accuracy | ±5 | % | | Number of Phases | 2 | - | | Rated Voltage | 26 | V DC | | Rated Current (per phase) | 1.0 | A | | Phase Resistance | 26 | Ohms (±10%) | | Phase Inductance | 26 – 32 | mH | | Holding Torque | 0.28 – 0.35 | N·m (39 – 50 oz·in) | | Detent Torque | 0.018 | N·m | | Rotor Inertia | 54 | g·cm² | | Dielectric Strength | 500V AC / 1 minute | - | | Insulation Resistance | 100MΩ (min) @ 500V DC | - | | Insulation Class | B (130°C) | - | | Operating Temperature | -20 to +50 | °C | | Shaft Diameter | 5 | mm | | Shaft Length (Flat type) | 20 – 24 | mm | | Weight | 0.32 – 0.35 | kg | VREF=Irun×8×Rsense=0

| Symptom | Possible Cause | Solution | | :--- | :--- | :--- | | | Vref is set too high, causing overcurrent. | Lower the driver's Vref. A user reduced theirs from 1.1V to 0.9V to solve overheating. | | Motor is extremely hot | Incorrect motor variant (e.g., a 0.8A motor treated as a 1.5A motor). | Verify the physical motor length (34mm) and its label code. | | Motor loses steps / skips | Driver current is set too low. | Recalculate and increase the Vref, ensuring it stays below the motor's rated current. | | Motor does not move | Incorrect wiring (e.g., mixing phases A and B). | Verify with a multimeter that each coil is connected to the correct driver terminals. | | Motor vibrates but does not rotate | A4988 driver's microstep pins (MS1, MS2, MS3) are not set correctly. | Check the state of your driver's microstep selection pins. | | Clicking noise / no movement | The driver's enable pin is active, or the motor current is too low. | Check driver enable logic and Vref calculation. |

Contrary to popular belief, this specific model (and its close sibling, the 26V09) is typically rated at 0.84A per phase .