DC 9-42V power supply; 12-30V power supply is recommended Control signal input voltage: 3.3–24V (universal, no series resistor required) Subdivision accuracy: 1–32 steps (selectable) Output peak current: 4.0A H-bridge bipolar constant-current drive Upgraded version of TB6600 driver, suitable for 57/42 two-phase hybrid stepper motors with phase current up to 4.0A Subdivision settings: 7 options (1, 2A, 2B, 4, 8, 16, 32) via 6-bit DIP switch Output current settings: 8 levels (0.5A, 1.0A, 1.5A, 2.0A, 2.5A, 2.8A, 3.0A, 3.5A) Suitable for small and medium-sized automation equipment and hardware, including engraving machines, marking machines, cutting machines, laser typesetting systems, plotters, CNC machines, crystal grinding machines, and automatic assembly equipment Optimized for 57 and 42 stepper motors with torque up to 1.8 N·m Features: 1. High-speed optocoupler isolation for input signals 2. Built-in thermal protection and overcurrent protection 3. Automatic half-step current reduction to minimize heat generation 4. Motor noise optimization Note: Product design or appearance may vary slightly between batches due to ongoing improvements; such variations do not affect functionality Color: As shown Material: ABS Package contents: 1 × Stepper motor driver Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm