Drive Technology for Dosing Devices—Optimal Dosing Results Through Perfect Coordination

Dosing systems play a crucial role in many industries, including the chemical, pharmaceutical, and food and beverage sectors. They enable the precise feeding of liquids, powders, or granules into production processes. At the heart of these systems are the drive technology and the associated control system, the selection and design of which significantly determine the efficiency, precision, and reliability of the dosing process.

Drive technologies in dosing devices range from electric and pneumatic to hydraulic. Each technology offers specific advantages depending on the application, such as precision in dosing very small quantities or the power required to transport highly viscous media. The control of these drives—whether manual, semi-automatic, or fully automatic—is crucial for integrating the dosing device into production processes. It must not only operate precisely and reliably but also be flexible enough to adapt quickly to varying process requirements.

The challenge in developing dosing devices lies in coordinating drive technology and control systems in such a way as to achieve optimal performance. This requires a deep understanding of both the mechanical and software aspects. The right combination of drive and control technology makes it possible to carry out dosing processes efficiently, precisely, and with high repeatability—which is indispensable in modern production.

Drive Technology from DEMIC: Your Benefits

A Coordinated, Comprehensive Solution

Control systems and drive technology are perfectly coordinated to achieve optimal dosing results.

Single Point of Power

A single, centralized power supply for the entire dosing unit.

Frequency Converter Technology

Optimized process control through precise speed regulation of motors.

2 motors


Coordinated conveying and product agitation for a consistent product flow.

Fundamentals of Drive Technology for Dosing Devices

What is drive technology?

Drive technology refers to the methods and devices used to move or control a machine or one of its parts. In dosing equipment technology, it encompasses the systems and components necessary for the precise and controlled feeding of materials. This may include electric motors, pneumatic systems, or hydraulic pumps. The choice of drive system depends on several factors, including the type of material to be dispensed, the required precision, and the environmental conditions. For example, electric drives offer excellent controllability for small to medium flow rates, while pneumatic or hydraulic systems are often used for larger volumes or for materials that require higher pressure.

The Role of Drive Technology in Dosing Devices

Drive technology is critical to the functionality of dosing devices, as it forms the basis for the precision and repeatability of dosing processes. An effective drive system makes it possible to feed exact quantities of materials at a controlled rate, which is essential for ensuring the consistency and quality of the end products. In the pharmaceutical industry, where precise dosages can be a matter of life and death, or in food production, where adherence to recipes is critical, the precision of the drive technology plays a paramount role. Furthermore, drive technology influences the efficiency of the entire system by optimizing energy consumption and minimizing maintenance requirements.

Difference Between Drive and Control Technology

Although drive and control technology are closely linked, they serve different purposes in dosing devices. Drive technology is primarily responsible for mechanical motion—that is, the actual activation and movement of the components that dose the materials. Control technology, on the other hand, encompasses the electronic or software-based systems that regulate and coordinate these movements. It ensures that the drive is activated at the right time, in the right amount, and in the right place. Control systems can range from simple manual settings to highly complex, fully automated interfaces capable of adapting and optimizing themselves based on feedback from production processes. This distinction is crucial for ensuring efficient and precise dosing processes in industrial applications.

Types of Drives for Dosing Devices

The drive technologies for dosing devices can be divided into three main categories: electric, pneumatic, and hydraulic. Each technology has specific characteristics that make it ideal for certain applications.

Electric Drives

These motors are characterized by precision, energy efficiency, and ease of control. Ideal for high-precision dosing, they enable clean and quiet operation. Specifically:

  • Stepper motors are ideal for fine positioning without feedback, especially in precise, small-volume dosing tasks.
  • Servo motors offer a high degree of control in dynamic dosing applications thanks to their feedback systems. 
  • Three-phase motors are suitable for rugged industrial applications, particularly when dosing larger or more viscous quantities.

Pneumatic Actuators

use compressed air to generate motion. These drives are particularly robust in dirty or hazardous environments and can be safely used in potentially explosive atmospheres. They offer simplicity and reliability because they have few moving parts and are easy to maintain. Their safety when handling flammable materials stems from the fact that they produce no sparks during operation. Although less expensive to purchase than complex electrical systems, they offer comparatively lower precision. Their fast and powerful motion makes them ideal for applications that require less precision but demand high responsiveness and ruggedness.

Hydraulic Drives

They use high-pressure fluids to generate large forces, making them ideal for heavy loads and high-pressure applications. They are widely used in heavy industry, where large quantities of materials must be moved or metered. These drives are characterized by their ability to handle substantial loads, making them particularly well-suited for demanding industrial tasks. However, hydraulic systems require more complex maintenance and consume more energy compared to other types of drives. Despite these drawbacks, they offer a reliable and effective solution for many industrial challenges where maximum force application is essential.

The selection of the appropriate drive technology therefore depends heavily on the specific requirements of the dosing task, such as precision, load, environmental conditions, and efficiency.

Frequency Converters - Efficient Control of Drive Motors

What are variable-frequency drives, and how do they work?

Variable-frequency drives are electronic devices that control the speed of an electric motor by varying the frequency of the current supplied to the motor. They convert the incoming alternating current into direct current and use it to generate an output alternating current of variable frequency.
By changing this frequency, variable frequency drives can precisely control the speed of motors. This ability to precisely regulate motor performance makes them particularly valuable in applications where process optimization and energy efficiency are critical.

Advantages of Variable Frequency Drives in Drive Technology

Variable-frequency drives offer significant advantages in drive technology. Their ability to precisely control motor power leads to improved process efficiency and energy savings, as motors consume only as much energy as they need for the task at hand. This not only reduces operating costs,

It also helps extend the service life of the motors by minimizing mechanical stress and the risk of overheating. In addition, they enable a smooth start-up and shutdown phase, which further reduces mechanical stress on the drive system.

Adjusting Motor Speed with Frequency Converters

Adjusting motor speed is one of the main functions of variable frequency drives. By changing the frequency of the current supplied to the motor, users can flexibly control the motor’s speed. This is particularly advantageous in production environments where different materials or processing steps require different speeds.

The ability to precisely adjust the speed allows for optimal adaptation to specific process requirements, which increases efficiency and improves product quality. Frequency converters are therefore essential components in modern automation and control systems.

Integration of Frequency Converters for Optimal Dosing Results

Challenges in Implementing Variable-Frequency Drives

The introduction of variable-frequency drives into existing systems can present technical and organizational challenges. From a technical standpoint, installation requires precise coordination between the variable-frequency drive and the motor characteristics to prevent efficiency losses and potential damage. From an organizational standpoint, training staff to use this technology can be a challenge, as it requires a deep understanding of how the devices work and how to program them. In addition, existing processes often need to be adapted or reconfigured to fully leverage the benefits of precise speed control.

Synchronization of Frequency Converters and Control Systems

The synchronization of variable-frequency drives with control systems is crucial for efficient and precise process control. Proper coordination ensures that the variable-frequency drive responds smoothly to control signals and precisely adjusts motor output to meet the process requirements. This requires careful programming and often the integration of feedback systems that provide real-time data on motor performance and process parameters. This data helps fine-tune the variable frequency drive settings to achieve optimal coordination and, consequently, improved product quality and process efficiency.

Selecting the Right Frequency Converter

Factors to Consider When Selecting a Frequency Converter for Dosing Equipment

When selecting the appropriate variable-frequency drive for dosing equipment, several key factors must be taken into account:

  • Motor power: The motor’s power requirements must match the frequency converter’s specifications exactly.
  • Operating conditions: The type of material being dosed, as well as the required precision and repeatability of the dosing, are critical.
  • Environmental conditions: The equipment must be suitable for the specific environmental conditions, including temperature, humidity, and potential exposure to chemicals or dust.
  • Operational Safety and Efficiency: The selection must maximize both operational safety and energy efficiency to minimize operating costs.

These factors help in selecting a variable frequency drive that is optimally tailored to the specific requirements and conditions.

Personalized Consulting from DEMIC Datentechnik GmbH

DEMIC Datentechnik GmbH offers customized consulting services to help companies select the optimal frequency converter for their specific dosing applications. DEMIC’s experts take all relevant factors into account, such as the technical specifications of the dosing equipment, the chemical properties of the materials to be dosed, and the environmental conditions. Through this customized consulting, DEMIC ensures that customers receive a variable frequency drive that is not only technically compatible but also delivers the highest possible efficiency and reliability for their specific applications.

Best Practices for Installing and Maintaining Variable Frequency Drives

Installing Frequency Converters – What You Should Keep in Mind

When installing variable-frequency drives, there are several important points to keep in mind:

  • Location: Choose a location with adequate ventilation and protection from extreme temperatures and humidity.
  • Electrical safety: Ensure that all electrical connections are correct and secure to minimize electrical safety risks.
  • Compatibility: Verify that the variable frequency drive is compatible with the motors it will control and other system components.
  • Commissioning: After installation, perform a thorough commissioning to ensure that all systems are functioning correctly and are set up efficiently.

These preparations help ensure that the variable frequency drive operates optimally and that potential problems are identified early on.

Maintenance of Frequency Converters to Extend Their Service Life

Regular maintenance is crucial for extending the service life of variable frequency drives and maintaining their performance:

  • Regular inspections: Regularly check all electrical and mechanical components for wear or damage.
  • Software updates: Perform software updates to ensure that the variable frequency drive operates with the latest technology and delivers optimal performance.
  • Cleaning: Keep the variable frequency drive and its surroundings clean to prevent overheating and dust buildup, which could impair performance.
  • Documentation: Keep detailed records of all maintenance activities and any issues that arise to facilitate future maintenance and ensure consistent performance.

These maintenance practices help minimize downtime and ensure the frequency converter’s reliability throughout its entire service life.

Control Technology - The Brain of Drive Technology

The Importance of Control for Precise Dosing

Control technology plays a central role in dosing technology by ensuring the precision and reliability of processes. It enables the precise control of the quantity, speed, and timing of the materials being fed. This is particularly important in industries such as pharmaceuticals and chemicals, where precise dosing is critical to product quality and safety. Thanks to advanced control mechanisms, dosing devices can deliver consistent results even under varying environmental conditions and material properties.

Types of Control Systems for Dosing Devices

The choice of control system depends on the specific requirements of the application, the complexity of the processes, and the desired level of automation.

Manual Controls


Manual controls require direct human intervention to operate the dosing devices. They are easy to use and often inexpensive to purchase. This type of control is suitable for smaller or less complex operations where simple adjustments are sufficient and precision requirements are not high.

Programmable Logic Controllers (PLCs)

PLCs are robust and reliable electronic devices specifically designed to handle a wide range of industrial control and automation tasks. They are programmable, which means they can be flexibly adapted to different operating conditions and requirements. PLCs are ideal for complex dosing systems that require fast signal processing and precise control.

Computer-Based Control Systems

Computer-based control systems offer the highest level of flexibility and precision for dosing technology. They utilize advanced software that enables complex algorithms and process controls. These systems can be easily adapted to changing parameters and offer comprehensive diagnostic and monitoring functions, making them particularly well-suited for highly automated and precision-critical applications.

Synchronization of Drive and Control Technology

Why is voting essential?

Coordination between drive and control systems is crucial for maximizing the efficiency and accuracy of dosing processes. Proper synchronization ensures that the drive systems respond precisely to commands from the control systems, resulting in improved product quality,

leads to less material waste and higher overall system reliability. Without this harmonization, inconsistencies and errors can occur that compromise the system's performance and safety.

Challenges in Synchronization

Synchronizing drive and control technology presents several challenges. These include integrating hardware with different interfaces and coordinating software protocols, which often come from different manufacturers. Furthermore, real-time communication requires

High-precision timing mechanisms between the drive and the control system to prevent delays and errors in signal processing. These technical requirements can make setup and commissioning complex and costly.

Best Practices for Optimal Coordination

To achieve optimal coordination between drive and control technology, the following best practices should be followed: First, the use of standardized and compatible components is recommended to facilitate integration. Second, thorough planning and simulation should be conducted 

The systems should be tested before actual implementation to identify potential problems early on. Finally, regular training of operating personnel is important to ensure that everyone involved understands how the systems work together and how any malfunctions can be efficiently resolved.

Selecting the Right Drive Technology

Define Requirements

Before selecting the right drive technology for dosing equipment, it is crucial to clearly define the specific requirements of the dosing process. This includes understanding the type of material to be dosed, the required precision, the throughput rate, and environmental conditions such as temperature or potential explosion hazards. Operating costs and maintenance requirements must also be taken into account. A precise definition of these parameters helps ensure the selection of a drive system that delivers optimal performance and efficiency within the intended application range.

Selection Criteria for Dosing Device Drives

Selecting the right drive for dosing equipment is based on several criteria. Among the most important are the type of drive (electric, pneumatic, hydraulic), energy efficiency, controllability, scalability, and the ability to integrate into existing systems. Operational safety also plays a key role, particularly in regulated industries such as pharmaceuticals and chemicals. The ability to dispense with precision and reproducibility, as well as to adapt quickly to changing production conditions, are also critical factors in the selection process.

Why Expert Advice Is Important

Selecting the right drive technology can be complex, especially in specialized or highly technical applications. Expert advice is therefore essential to avoid costly mistakes and safeguard your investment. Experts can not only help precisely define the technical requirements but also suggest the latest technologies and solutions tailored specifically to the needs of the respective production process. Through their experience and expertise, they help companies maximize operational efficiency and ensure compliance with industry standards and safety regulations.

Maintenance and Repair of Drive Systems

Regular Maintenance Intervals

Establishing regular maintenance intervals is crucial for the longevity and efficiency of the drive systems in dosing devices. It is recommended to create maintenance schedules based on the manufacturers’ recommendations that also take specific operating conditions into account. Regular maintenance should include inspections, cleaning, lubrication, and the inspection and replacement of wear parts. Monitoring system performance and applying any necessary software updates are also important. These measures help increase operational reliability, maintain equipment performance, and prevent unexpected downtime. A well-planned maintenance cycle plays a key role in reducing total cost of ownership and increasing productivity.

Preventive Maintenance Strategies

Preventive maintenance plays a crucial role in minimizing downtime and extending the service life of drive systems. This strategy is based on regularly inspecting and maintaining equipment to identify and resolve issues before they lead to serious failures. Modern monitoring technologies, such as vibration sensors and thermography, are used to detect signs of wear or malfunction at an early stage. A proactive approach to maintenance allows for scheduled maintenance, which is less invasive and more cost-effective than reactive repairs following a failure. Effective preventive maintenance plans take into account the operating conditions of the drives and are designed to ensure optimal performance and a long service life for the drive technology.

The Future of Drive Technology in Dosing Devices

Innovative Developments


The future of drive technology in dosing devices is strongly shaped by innovations that increase efficiency, precision, and adaptability. Notable developments include the use of smart motors equipped with integrated sensors to collect operational data in real time and make adjustments autonomously. These intelligent drive systems enable more precise control and diagnostics, which simplifies maintenance and increases operational reliability. Furthermore, the integration of artificial intelligence to predict maintenance needs and optimize dosing processes will play an increasingly important role.

Trends in Drive and Control Technology

Current trends in drive and control technology for dosing equipment show a clear shift toward further automation and digitization. The networking of drive systems via the Internet of Things (IoT) enables improved data collection and analysis, which is used to make more precise control decisions. In addition, the development of energy-efficient and environmentally friendly technologies is being driven forward to support sustainability goals. These trends point to a future in which drive and control systems will become increasingly complex, yet also more efficient, adaptable, and user-friendly.

FAQs on Drive Technology

Electric drives offer high precision, energy efficiency, and ease of control. They are ideal for applications that require high accuracy and repeatability and are particularly well-suited for clean, quiet operating conditions, such as those found in laboratories or cleanrooms.

Pneumatic actuators are particularly well-suited for environments that require robust and safe solutions, such as explosive or extremely dirty environments. They are ideal for applications that require fast and powerful movements.

Challenges include integration into existing systems, compatibility with existing motors, and training for operating personnel. In addition, real-time communication between the drive and the control system can be technically challenging.

Good synchronization improves the efficiency and accuracy of processes, minimizes material waste, and increases the reliability of the entire system. It is essential for optimizing production processes and ensuring the quality of the final products.

Key factors include the motor's power requirements, the specific operating conditions, the type of material to be dispensed, and the required precision. Environmental conditions and safety requirements also play a role.

A preventive maintenance strategy includes regular inspections, the replacement of wear parts, software updates, and monitoring using modern diagnostic technologies to detect and resolve problems early on.

Regular maintenance—including cleaning and inspecting all parts for wear and damage—as well as the use of preventive maintenance practices can significantly extend the service life of drive systems.

New trends include increasing automation, the integration of the Internet of Things (IoT) for improved data analysis and remote monitoring, and the development of energy-efficient and environmentally friendly technologies to achieve sustainability goals.


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Your Contacts

Björn Demmer

Partner - Managing Director

PHONE: 02247 918 90
EMAIL: bdemmer(at)demic-datentechnik.de

Heinz Demmer

Partner - Managing Director

PHONE: 02247 918 90
EMAIL: hdemmer(at)demic-datentechnik.de