CNC Shield + 4 controladores A4988 + Arduino UNO R3 + Cable USB
cnc shield v3 engraving machine 3D Printer+ 4pcs A4988 driver expansion board forArduino + UNO R3 with USB cable
Los precios no incluyen IVA. Fotografías no contractuales.
Low Rds(on) outputs
Automatic current decay mode detection/selection
Mixed and slow current decay modes
Synchronous rectification for low power dissipation
3.3 and 5 V compatible logic supply
Thermal shutdown circuitry
Shorted load protection
Five selectable step modes: full, 1/2, 1/4, 1/8, and 1/16
The A4988 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate
bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. The A4988 includes a fixed off-time current regulator which has the ability to operate in slow or mixed decay modes.
The translator is the key to the easy implementation of the A4988. Simply inputting one pulse on the STEP input drives
the motor one microstep. There are no phase sequence tables, high-frequency control lines, or complex interfaces to program. The A4988 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
During stepping operation, the chopping control in the A4988 automatically selects the current decay mode: slow or mixed. In
mixed decay mode, the device is set initially to a fast decay for a proportion of the fixed off-time, then to a slow decay for the remainder of the off-time. Mixed decay current control results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.