{"product_id":"keyestudio-a4988-reprap-stepper-m-otor-driver-heat-sink-for-3-d-printer-ramps1-4-for-arduino","title":"Keyestudio A4988 Reprap Stepper M otor Driver + Heat sink For 3D Printer,RAMPS1.4 For Arduino","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis stepper motor driver is powered by A4988, a DMOS microstep driver with converter and overcurrent protection. It is available in full, half, 1\/4, 1\/8 and 1\/16 stepping modes to operate bipolar stepper motors with output drive performance up to 35 V and ± 2A. The A4988 includes a fixed turn-off time current regulator that operates in slow or mixed decay mode. The converter is the key to easy implementation of the A4988. As long as the “step” input carries in a pulse, you can drive the motor to produce micro-step. There is no need for phase sequence tables, high frequency control lines or complex interface programming. The A4988 interface is ideal for complex microprocessors that are not available or overloaded.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThis stepper motor driver is powered by A4988, a DMOS microstep driver with converter and overcurrent protection.\u003c\/li\u003e\n\u003cli\u003eIt is available in full, half, 1\/4, 1\/8 and 1\/16 stepping modes to operate bipolar stepper motors with output drive performance up to 35 V and ± 2A.\u003c\/li\u003e\n\u003cli\u003eThe A4988 includes a fixed turn-off time current regulator that operates in slow or mixed decay mode.\u003c\/li\u003e\n\u003cli\u003eThe converter is the key to easy implementation of the A4988.\u003c\/li\u003e\n\u003cli\u003eAs long as the “step” input carries in a pulse, you can drive the motor to produce micro-step.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSKU: KS0281\u003c\/li\u003e\n\u003cli\u003e1.With only a simple step and direction control interface;\u003c\/li\u003e\n\u003cli\u003e2.Five different step modes: full, half, 1\/4, 1\/8 and 1\/16;\u003c\/li\u003e\n\u003cli\u003e3.Adjustable potentiometer can adjust the maximum current output, resulting in a higher step rate;\u003c\/li\u003e\n\u003cli\u003e4.Automatic current decay mode detection \/ selection;\u003c\/li\u003e\n\u003cli\u003e5.Overheat shutdown circuit, undervoltage lockout, cross current protection;\u003c\/li\u003e\n\u003cli\u003e6.Ground short circuit protection and load short circuit protection\u003c\/li\u003e\n\u003cli\u003e3. Setting method of working mode\u003c\/li\u003e\n\u003cli\u003e4. Adjusting Drive current\u003c\/li\u003e\n\u003cli\u003eWhen use the A4988 to drive the stepper motor, we can turn the potentiometer on the A4988 module to adjust the upper limit of the output current. The voltage between the marked potentiometer and GND is VREF\u003c\/li\u003e\n\u003cli\u003eThe calculation formula of the current upper limit is I=VREF\/(8*Rs)\u003c\/li\u003e\n\u003cli\u003eRs is the reference resistor; the reference resistor for this module is 0.05Ω. VREF=I*8*0.05=0.4I\u003c\/li\u003e\n\u003cli\u003eThe current limit of the module is 2A, so VREF=2*0.4 , that is, 0.8V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ea fixed turn-off time current regulator that operates in slow or mixed decay mode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWiring\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIt needs to connect DC 8-15V between motor power VMOT and GND.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTutorials\u003c\/h2\u003e\n\u003cp\u003eWiring, sample code, and setup steps are in the Keyestudio Wiki.\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/docs.keyestudio.com\/projects\/KS0281\/en\/latest\/\"\u003eKS0281 documentation\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keyestudio","offers":[{"title":"Default Title","offer_id":63207195246673,"sku":"KS0281","price":4.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1087\/1819\/4769\/files\/7a940bfa17.jpg.500x500.jpg?v=1793067254","url":"https:\/\/geekingmall.com\/products\/keyestudio-a4988-reprap-stepper-m-otor-driver-heat-sink-for-3-d-printer-ramps1-4-for-arduino","provider":"GeekingMall","version":"1.0","type":"link"}