Bipolar stepper motor driver module circuit


Posted on Nov 10, 2015

Circuit works: Figure shows a dedicated stepping motor controller L297 key pin, 17 feet (cw / ccw) is used to control the stepper motor rotation direction


Bipolar stepper motor driver module circuit
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18 feet (CLOCK) used to control the speed of the stepping motor speed ; 19 feet (HALF / FULL) for stepper motor full-step, half-step selection; 20 feet (rESET) is low, to the initial state when power is restored, ABCD = 0101; 10 feet (ENABLE) for the chip reset terminal when the terminal is low, ABCD = 0000, that is, each phase stepping motor is not energized in the workplace in order to manually adjust some tuning work location; 15 feet (VREF) as a reference voltage terminal of the voltage determines the step electric motive coil current is, Vvef = is Rs1 (Rs2), general Rs1 - Rs2 - 0.5 Omega; 16 feet (Osc) external RC value depends on the frequency of the chopping frequency of the chopper circuit is f = I / ( 0. 7R C), R must be greater than 10 k , 20 kHz shown in the figure is typical chopping frequency. Use this line to drive the following rated voltage 36 V, 2 A similar within all four lines, six lines of permanent magnet or hybrid stepping motor.




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