DC 9-42V power supply, compatible with 12-30V input Control signal input voltage: 3.3-24V universal (no external resistor required) Subdivision accuracy: 1-32 step selectable Output current: 4.0A H-bridge bipolar constant current drive Upgraded version of TB6600, suitable for 57 and 42 type two-phase hybrid stepper motors with phase current up to 4.0A Features 7 selectable microstep settings (1, 2A, 2B, 4, 8, 16, 32) via 6-bit DIP switch 8-level output current adjustment (0.5A, 1.0A, 1.5A, 2.0A, 2.5A, 2.8A, 3.0A, 3.5A) Ideal for small to medium-sized automation equipment and machinery Commonly used in engraving machines, marking machines, cutting machines, laser photoplotters, plotters, CNC machine tools, crystal grinding machines, and automatic assembly equipment Best suited for 57 and 42 stepper motors with torque of 1.8N.m or less High-speed optocoupler isolation on input signals Built-in thermal protection and overcurrent protection Automatic half-current mode to reduce heat generation Motor noise optimization function Note: Product may vary slightly between batches; minor differences in appearance or color may occur, which do not affect functionality Color: As shown Material: ABS Package Contents: 1 x Stepper Motor Driver Kit Note: Other items not included Lighting and display differences may cause slight color variation between image and actual product Measurement tolerance: +/- 1-3 cm