1. Product Overview

Step motor is a motor that converts the electrical pulse signal into the corresponding angle displacement or the line displacement. It can use the quantity and frequency of the pulse to control the rotation (rotation angle, rotation speed) in automation applications. For each of the pulse, the motor rotor rotates a angle or forward, and its output angle shift or line displacement is proportional to the input pulse, and the speed is proportional to the pulse frequency. Therefore, step motor is also called pulse motor.

In the case of non-overload, the speed of the motor and the stop position depends only on the frequency and number of the pulsed input, without being affected by the load change. That is to say, add a pulse signal to the motor, and the motor turns a step distance. The advantage of this linear relationship between pulse and angle rotation, plus that a step motor only has periodic errors without cumulative errors, make step motor widely used in automation speed, position and other control fields easily.

With the development of product research and development of technology, the performance of the step system has been even more improved. If the stepper system is not overloaded, there will be no step loss mostly nowadays, and life time very long, almost no need maintenance, which makes steppers popular and widely used in many kinds of industrial automation motion control applications.

Although the stepper motor and its control technology are currently very mature, if not used properly, there may still be a situation of step loss, i.e. position error. Next, we will analyze the common causes and solutions of position errors.

The reasons for the position error of stepper motors

Large load inertia

When the inertia of the load driven by the stepper motor is large, its inertia will generate inertia force, causing the current waveform output by the stepper motor controller to be inconsistent with the actual required current waveform, resulting in inaccurate position of the stepper motor.

The stepper motor driver is not set correctly

Incorrect settings of the stepper motor driver, such as fine fraction, step angle, and other parameter settings, can also lead to an increase in the position error of the stepper motor.

The pulse signal output by the stepper motor controller is unstable

When the pulse signal output by the stepper motor controller is unstable, it can lead to inaccurate position of the stepper motor. This situation is more common when using long-distance transmission of control signals.

The stepper motor is damaged

The rotor or stator of the stepper motor may be damaged, or the bearings may be damaged, which can lead to positional errors in the stepper motor.

Methods to solve the position error of stepper motors

Control load inertia

The position error of the stepper motor can be reduced by reducing the load inertia. For example, when driving a stepper motor with inertia loads, methods such as installing shock absorbers and changing the load inertia mode can be used to reduce the load inertia.

Set the driver parameters correctly

Correctly set the subdivision and step angle parameters of the stepper motor driver to ensure the position accuracy.

Stable output pulse signal

High precision pulse generators or adjustable filters can be used to stabilize the output pulse signal and reduce the position error of stepper motors.

Replace damaged stepper motor components

When the stepper motor is damaged, it is necessary to replace the corresponding components in order to restore the normal operation of the stepper motor.

The Applications of Kaifull PRMCAS Hybrid Stepper Motors

Mainly used in industries, aerospace, robotics, precision measurement and other fields, such as optoelectronic theodolites for tracking satellites, military instruments, communication and radar equipment, the widespread application of subdivision drive technology makes the phase number of motors not limited by step angle, bringing convenience to product design. At present, in the subdivision drive technology of stepper motors, chopping constant current drive, instrument pulse width modulation drive, and current vector constant amplitude uniform rotation drive control are adopted, greatly improving the operating accuracy of stepper motors and promoting the development of stepper motors in the direction of high-speed and precision in medium and low-power applications.

Kaifull hybrid stepper motors are currently widely used in various automation equipment and instruments such as engraving machines, laser machines, CNC machine tools, textile and clothing machinery, medical equipment, measuring equipment, electronic processing equipment, packaging machinery equipment, etc.

In the field of robotics

In the field of robotics, stepper motors are widely used to control the motion and direction of robot arms. By sending pulse signals on the motor, the robot can easily and accurately pick up or place items.

Printing assembly

In the printing and assembly industry, stepper motors achieve high-quality printing and assembly by controlling the movement of rollers, discs, and other moving parts on the printing machine.

Medical devices

In the field of medical devices, stepper motors are used to control the automated positioning and movement of surgical robots and medical equipment.

3D printing

In 3D printing technology, stepper motors can achieve complex 3D structures and shapes by controlling the movement of the print head.

Industrial automation

In the field of industrial automation, stepper motors are widely used in the control of various equipment, such as engraving machines, laser machines, CNC machine tools, textile and clothing machinery, medical equipment, measuring equipment, electronic processing equipment, packaging machinery and other automation equipment and instruments.

In summary, stepper motors have become an indispensable component in various application fields, helping various devices and machines complete complex actions through their stable motion and precise control.

2. Hybrid Stepper Motor General Technical Specifications

3. Hybrid Stepper motor Performance Datasheet

4. Mechanical Dimensions (in mm)

5. Matching Connector with Leads Dimenssions

6. Wiring Diagram

7. Torque Speed Curves