In many areas, there is a need to convert electrical current into mechanical movement - in discrete steps. In such cases, stepper motors are used which, unlike conventional electric motors, can be precisely controlled in their rotary movements. The result is that you can achieve angular positions without feedback. With a stepper motor controller, you are ideally equipped for many different applications, whether in automation technology or robotics, production automation, laboratory technology or engineering, and ensure precise positioning and a high degree of motion control.

Available devices

  • Level measurement and leakage monitor

If you are looking for a professional and reliable stepper motor with controller, SEIKOM Electronic is the right place for you. We have been selling stepper motors and controllers from OJ Electronics in Denmark for many years. Benefit from an exquisite selection of stepper motors and controllers for stepper motors that meet your highest demands. We cordially invite you to get an overview for yourself and take your time to look around.

Experience and expertise in stepper motor control

From the very beginning, around 30 years ago, we at SEIKOM Electronic have attached great importance to TÜV-tested quality, performance and functionality in all our devices for the Innovative measurement and control technology. In addition to OJ Electronics brand stepper motors, we develop, manufacture and sell flow meters and flow monitors, temperature sensors, Pressure transmitter and pressure switch sensors for measuring humidity and air quality as well as level measuring devices and Heating, ventilation, air conditioningDevices and much more. Furthermore, we are one of the few providers on the market to focus on a Safety Integrity Level range and Explosion protection (ATEX) have specialized in. These include, for example, our Flow monitor SIL2. Benefit from our comprehensive and individual advice and professional services, where we guarantee speed and reliability. We are happy to use our experience with stepper motors to meet your personal requirements.

steel-pipes-and-cables-in-a-plant (11)

What does a stepper motor controller offer?

Stepper motors are electric motors that divide their rotary movements into discrete steps. Each step marks a fixed angle of rotation. Stepper motors are controlled by transmitting electrical pulses to the windings. With each pulse, the motor rotates through a fixed angle. Stepper motors are particularly useful in applications where precise positioning and speed control are required.

How does a stepper motor with controller work?

Stepper motors use magnetic fields that are generated by electricity. The pulse that flows through the motor windings begins to turn the rotor in discrete steps. The main difference between stepper motors and other electric motors is that stepper motors perform their movements at fixed angular intervals, or 'steps', without the need for an external sensor for position feedback.

The structure of a stepper motor usually consists of a stator as a fixed part with windings and a rotor as a rotating part. When an electric current flows through one of the stator windings, a magnetic field is generated. This magnetic field attracts the rotor so that it aligns itself in a position that corresponds to the magnetic field. By applying current to the windings in a specific sequence, the rotor of the stepper motor is rotated step by step.

A key element in the operation of stepper motors is the controller or driver, which determines the sequence and rate of electrical pulses sent to the motor windings. By precisely controlling these pulses, the motor can be operated with high precision in terms of speed, direction and position. Therefore, stepper motors are particularly useful in applications that require precise positioning, such as CNC machines, 3D printers and robotics.

What types of stepper motors are there?

There are various types of stepper motors that differ in terms of their design and functional principle. You can find out which stepper motor option is most suitable for you during an individual consultation with an expert from SEIKOM Electronic.

Permanent magnet stepper motor (PM)

This type of stepper motor uses a permanent magnet as the rotor. The motor rotates by changing the magnetic pole of the rotor in relation to the stator. Permanent magnet stepper motors are often used in low to medium power applications.

Variable reluctance stepper motor (VR)

The rotor of this stepper motor with controller is made of soft iron and has several teeth. It rotates by minimizing the reluctance, i.e. the resistance to the magnetic flux. The rotor is positioned so that it is in line with the winding of the stator.

Hybrid stepper motor

As the name suggests, these stepper motors combine the properties of permanent magnet and reluctance models. The rotor consists of both a permanent magnet and several teeth. This enables a higher step resolution and higher torques. Hybrid stepper motors are often used in industrial applications where high precision is required.

Bipolar stepper motor

This variant of stepper motors refers to the way the motor is electrically connected and not so much to the mechanical construction. A bipolar stepper motor requires windings with two ends and requires a reversal of the current flow in order to be able to rotate the motor in both directions.

Unipolar stepper motor

A winding with a center tap is used here, which makes switching the current direction superfluous and simplifies control. However, the output is often lower than with a comparable bipolar motor.

Each type of stepper motor undoubtedly has its advantages and disadvantages in terms of torque, speed and control complexity. Choosing the right stepper motor depends on the specific requirements of the application at your site.

What are the advantages of stepper motors?

You have probably already recognized one or two of the advantages of stepper motors. Precise positioning and repeatability are probably among the greatest advantages. Each electrical pulse corresponds to a fixed rotary movement. This allows the motor to move to a specific position accurately and consistently. With proper control and under stable operating conditions, this precision is maintained over the service life of the stepper motor. Another advantage is the open-loop control. Stepper motors therefore do not require any feedback systems (e.g. encoders) for position determination or correction. This reduces the complexity of the system and makes operation more efficient in many cases. They also deliver maximum torque at low speeds, which even makes them ideal for applications with a high starting torque. Compared to servo motors, stepper motors are more cost-effective and require less maintenance. As they do not use brushes or contactors, mechanical wear is significantly reduced.


Thanks to their sophisticated design made of robust materials, stepper motors can be used in harsh environments without any disadvantages. Their construction is resistant to temperature fluctuations, vibrations and other environmental conditions. In most cases, stepper motors are designed for easy integration into computer-controlled systems, allowing movements to be controlled by digital pulses. In addition, they provide important information on actual performance and output error messages.

Although stepper motors have a lot of advantages, it is important to note that they reach their limits in certain situations. Overloading or excessive speeds can lead to a loss of movement or decreasing torque. It is therefore crucial to select the right stepper motor for the application in question.

What are the areas of application for stepper motors with controls?

The reliable stepper motors from OJ Electronics are used for the efficient control of ventilation systems and rotary heat exchangers. Here, the specially developed devices impress with maximum efficiency and precision.

Our selection of stepper motors

With us, you benefit from an extensive selection, which you can find in our Product categories find.

and 2 Nm. The power output is 260 W, 110 W or 55 W. The operating temperature is between -40 °C ... 40 °C, while the storage temperature is in the range -40 °C ... 70 °C. All variants of the drives for rotary heat exchangers have a shaft diameter of 12 mm and a cable length with plug of 0.3 m.

A special feature of our stepper motors is the DRHX-1055-MAD5 controller for stepper motors. The combination of a stepper motor for high torque with a sensor-free control loop is impressive. The result is more precise and energy-efficient control, as the drive regulates the voltage precisely to the required value in accordance with the operating speed and torque. We will be happy to assist you in selecting the right stepper motor and the right controller, for which a patent application has been filed by our partner OJ Electronics.

We also offer a motor anchorage, matching pulleys and cone fasteners, extension cables and rotor protection sensors for the MRHX series stepper motors and DRHX series controllers.

If you have any further questions about stepper motors or would like advice from one of our specialists, we look forward to hearing from you.