What are step engines?
Stepper Motors are engines that rotate the set number of degrees in response to electronic pulse. This method allows the speed and size of the rotation to be slightly controlled without the use of the feedback system. Kin cutters are often used in disk units, machine tools and robotics. They are awarded for their high torque at low speeds and because they tend to be extremely reliable in all environments.
The step engine is basically a circle of electromagnets arranged around a single permanent magnet called a rotor. Pulse of electricity is sent to each electromagnet and charges it. This causes the magnet to rotate towards this electromagnet. This electromagnet is discharged and then sent to the next. Charging and discharging electromagnets causes the rotor to rotate 360 degrees on its axis. If the electronic pulses are fast enough, it results in a continuous rotor rotation.
One rotor movement is called a step. Each step has the sameOU size, with variations no more than 3 to 5 degrees. Because each pulse is a discreet event, variations do not add up over time and cause a great loss of accuracy. This means that step engines can never be more than 5 degrees from perfect accuracy.
The engine rotation speed can be changed by changing the pulse frequency. If the pulses stop, as if no power is sent to the engine, the rotor will match the closest magnet and hold there. The attraction between the magnet and the metal is sufficient to prevent the shaft from rotating.
Stepper Motors generally have three step modes. The complete step regime causes the rotor to move one full step for each pulse. Many standard step engines are 200 steps, which means that each pulse causes the rotor to move 1/200 360 degree circle. Therefore, a standard step motor set in full step mode rotates about 1.8 degrees for each pulse.
reThe half -step allows the operator to double the number of steps for full rotation. The standard 200-step engine set in half mode will have 400 steps efficiently, as the rotor moves half a step for each pulse. Microstep mode divides rotation into even less steps. Each pulse distribution allows for greater accuracy, but also causes the engine to lose part of its torque.