In this example I’m going to use the full step two-phase mode for controlling the bipolar stepper motor. There is another controlling type called microstepping, this type is more accurate than the half step mode, it requires two sinusoidal current sources with 90° shift. it requires power in-between one-phase and two-phase modes, torque also is in-between. This mode increases accuracy by dividing each step by 2. Half step mode is a combination of the two full step modes (one-phase and two-phase). This mode provides the highest torque but it requires twice as much power as one-phase mode. In full step two-phase mode the driver energizes the two coils at the same time. This type of controlling requires the least amount of power but provides the least torque. In full step one-phase mode the driver energizes one coil at a time. The full step can be divided into 2 types: one-phase and two-phase. The popular controlling modes of of the stepper motor are: full step and half step. The other type is the unipolar stepper motor, it is 4-phase brushless motor which has 5 or 6 wires. The bipolar stepper motor is a two-phase brushless motor which has two coils (windings), this motor has 4 wires (2 wires for each coil). Proteus simulation of the example is provided at the end of the topic.īasically there are two types of stepper motors: bipolar and unipolar.
The stepper motor used in this example is just a PC CD-ROM (or DVD-ROM) drive which has 4 wires.
#Step motor arduino code how to#
This small post shows how to control speed and direction of rotation of bipolar stepper motor using Arduino UNO board and L293D motor driver chip.
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