What is a Step Motor?
A stepper motor is an electromechanical device that converts electrical impulses directly into mechanical motions. The sequence, frequency, and quantity of electrical impulses applied to the motor coils can be controlled to control stepper motors' steering, speed, and rotation angles. We can achieve precise position and speed control without closed-loop feedback control with a position sensing system, using a stepper motor and related supporting driver to composite a simple, low-cost open-loop control system.
Stepper Motor Basics
Stepper motors are brushless, synchronous electric motors that convert digital pulses into mechanical shaft rotations. The rotation of a stepper motor is divided into a set number of steps, sometimes as many as 200. Each step must be sent to the stepper motor as a separate pulse. A stepper motor can only receive one pulse and take one step at a time, with each step having the same length. Since each pulse causes the motor to rotate at a precise angle - typically 1.8 degrees - you can precisely control the position of the stepper motor without any feedback mechanism being used. As the frequency of the control pulses increases, the stepping movement converts into a continuous rotation with the velocity of the rotation directly proportional to the frequency of the control pulses. Stepper motors are widely used because of their low cost, high reliability, and high torque at low speeds. Their rugged construction enables you to use stepper motors in a wide environmental range.
Advantages of Using Stepper Motors
As the speed of a step motor is proportional to the frequency of the input pulses from the controller, a wide range of rotational speeds can be achieved. Stepper motors are capable of precise open-loop positional control without any feedback mechanism. Using a load that is directly coupled to the shaft of the stepper motor, a very low-speed rotation is possible. There are no contact brushes in a stepper motor, which makes it quite reliable. In general, a stepper motor's life is determined by its bearing. Stepper motors are very effective at starting, stopping, and reversing. Stepper motors provide precise positioning and repeatability of movement. An energized stepper motor maintains full torque at a standstill position.
Types of Stepper Motors
There are three types of step motors: permanent magnet, hybrid, and variable reluctance. The hybrid stepper motor offers the greatest versatility and combines the best characteristics of both variable reluctance and permanent magnet stepper motors. A hybrid stepper motor consists of a multi-toothed stator pole and a permanent magnet rotor. In a hybrid stepper motor, the rotor has 200 teeth and rotates 1.8 degrees per revolution. The hybrid stepper motors provide high static and dynamic torque as well as a high step rate. Computer disk drives and CD players are among the applications for hybrid stepper motors. Hybrid stepper motors are also widely used in industrial and scientific applications. Hybrid step motors are used in robotics, motion control, automated wire cutting, and even in high-speed fluid dispensers.
How can I get consultation and help about product issues from kaifull?
Please contact your local distributors or write email to sales@kf-motor.com
What kind of product data can I download in the download section?
User manual, GUI instruction, quick start, datasheet, drive 2D/3D drawing, motor 2D/3D drawings.
Alarm light is flashing?
If has wrong motor wire connection, please check the motor wirings firstly. If the voltage is too high or too low, check the voltage output of switching power supply. If with damaged motor or drive, please replace new motor or drive.
Fieldbus stepper drive has communication failure?
If has parameter setting problem, please refer to user manual for details. If has Network cable problem, it is recommended to use a Category 5e shielded network cable.
What is stall torque?
Stall torque is also called dynamic torque, and it is the maximum torque that can be applied to a motor before it stalls or loses synchronization. This is the torque represented on a torque-speed curve.
My stepper motor is running hot to the touch. Is there something wrong?
Stepper motors are rated to withstand a case temperature of 80 degrees Celsius, which is hot to the touch but does not harm the motor.
Can BLDC motors run as servo motors?
We do not recommend using BLDC motors as servo motors because BLDC’s run better at high speeds and cannot handle slow, precise movements. For an application requiring low speed and accurate positioning, we recommend using a stepper motor and an encoder.
Are your brushless motors autoclavable?
We offer a complete line of brushless DC-slotted motors that are autoclavable. The unique design of these motors makes them suitable for use in sterile and other demanding environments. In addition to being autoclavable, our motors have been tested to withstand more than 1,000 autoclave cycles. Medical applications that require autoclaving frequently utilize our brushless motors.