The key question to be answered by the high-level control system for a stepper motor is, when should the next step be taken? While this almost always depends on the application, the similarities between different applications are sufficient to justify the development of fairly complex general purpose stepper motor controllers. Stepper motor control may be …
The control method of stepper motor is generally divided into two control methods: open-loop control and closed-loop control. Among them, the simplest control method for open-loop control of stepper motor is the ring control system. Under this control method, the stepper motor controls pulses. The input of the motor does not depend on the position …
When you’re looking for a stepper motor, you’ll often see statistics related to torque. Torque information isn’t the only thing you’ll be looking at when it comes to selecting your motor, but it is important. Generally, you’ll be looking at information regarding how much torque the stepper produces under certain conditions. Before you start examining …
There are several factors to take into consideration when choosing a stepper motor for an application. Some of these factors are what type of stepper motor to use, the torque requirements of the system, the complexity of the controller, as well as the physical characteristics of the motor. The following contents focus on these considerations. …
A stepper motor is an electromechanical system which is transducing an electrical signal into a mechanical one. It is designed to accomplish a discrete movement (notion of step) and reach a precise position. The movement is achieved through the use of a magnetic field provided by coils and sensed by magnets. Indeed, when one of …
This technical article describes the most accurate way to describe step error that is most meaningful to the step motor user. The traditional way to specify step accuracy is in the form of a percentage by taking the full step error divided by the fundamental step angle of the motor. Let’s understand this and see …
Stepper motors are mostly driven in open loop mode. Timing of the step pulses is defined by the controller, the motor is supposed to follow without loosing synchronism. Stepper motors are in fact natural positioning devices which do not require position feedback. The drawback of their design are important iron losses when running at high …
The following environmental and safety considerations must be observed during all phases of operation, service and repair of a stepper motor system. Failure to comply with these precautions violates safety standards of design, manufacture and intended use of the stepper motor, driver and controller. Please note that even a well‐built stepper motor products operated and …
An important point to consider in the application of stepper motors is whether the motor characteristics are suitable to the operating conditions. The following describes the characteristics to be considered in the application of stepper motors. The two main characteristics of stepper motor performance are: Dynamic Characteristics Speed – Torque Characteristics The figure above is …
The figures below show two cross-sections of a 0.72° stepper motor. The stepper motor consists primarily of two parts: a stator and rotor. The rotor is made up of three components: rotor 1, rotor 2 and a permanent magnet. The rotor is magnetized in the axial direction so that, for example, if rotor 1 is …
