![]() ![]() ![]() Steppers normally should not be driven directly from an Arduino, as this is likely to result in damage. It is titled, DC Motors, Tutorial-3/3: Steppers.Ĭare must be taken if you are using steppers with an Arduino. If you are not familiar with stepper motors (also called stepping motors, step motors, or simply steppers) you may want to read Part 3 of my tutorial on D.C. Most servos are restricted to 180 degrees, pi radians, of rotation, although that need not be the case. Unlike servos, steppers can rotate continuously through a full 360 degrees, i.e., 2 pi radians. However, there is a torque/speed trade-off (see below when the 28BYJ-48, a small geared stepper, is discussed). Steppers can offer a significant amount of torque, particularly if geared. For most Maker projects high resolution is not needed, so, cost savings are possible with the appropriate stepper selection. Not only is greater accuracy possible with more poles, but with a higher pole count motor vibration/shake is also reduced, as each step is shorter. Stepper speed is easy to control in Arduino sketches, as will be seen in this tutorial.Ī stepper motor's resolution depends on the size of its basic step, i.e., its pole count. )Īssuming current to the stepper still flows. Steppers can go to a specific angular position and stay there with a holding torque (see discussion of holding torque in my previous tutorial. They appear in many, if not most, precision electronic machines such as 3D printers, flatbed image scanners, plotters, engravers, robotic vacuums, robotic lawn mowers, and other robots, automobile speedometers, disk drives, CNC equipment, camera focusing mechanisms, laser and plasma cutters, etc. ![]() Stepper motors are truly interesting, some might say amazing, and they are certainly useful. ![]()
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