Category: Process Monitoring

Servo electric presses have revolutionized the manufacturing world through exceptional control, precision, and efficiency. Many of the products we rely on every day are only possible through the use of servo electric presses. These presses use servo motors to power the pressing mechanism, allowing for programmable motion and force, which can be adjusted in real-time based on immediate feedback. Let’s take a closer look at how these presses work and the key advantages of a servo electric press.

How Does a Servo Electric Press Work?

Understanding how a servo electric press works can help in understanding the key advantages it offers. A servo electric press uses an electric servo motor to power the press ram. While other types of presses use fluid pressure, air pressure, or mechanical devices to create force, servo electric presses use the motor to deliver precise control over motion, speed, and pressure.

The system relies on a feedback loop between sensors and the motor to allow for real-time adjustments. Operators can program different motion profiles, allowing them to increase or decrease speed or force at various stages of the cycle. This level of control is essential for complex manufacturing tasks that require varying pressures or precise movements to form, bend, or shape materials.

In addition, the motor operates only when it’s needed, making it highly energy-efficient. When the press is idle, it consumes little to no energy, reducing both operational costs and the environmental footprint of the manufacturing process.

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Servo Electric Presses vs Standard Industrial Presses

Compared to standard industrial presses like hydraulic or pneumatic presses, servo electric presses offer a few important advantages.

• Customizable Motion: Traditional presses are typically limited to a fixed cycle of motion, which can be inefficient when handling complex tasks. Servo electric presses, on the other hand, can adjust their speed and force mid-cycle, offering a tailored approach to each material or task.
• Consistent Accuracy: Mechanical presses may lose precision over time due to wear and tear. Servo electric presses rely on a digital control system, so they maintain high accuracy and consistency over thousands of cycles.
• Cleaner Operation: Hydraulic presses require oil or other fluids, which can lead to leaks or spills, resulting in a messier work environment and higher maintenance needs. Servo electric presses, with their motor-driven system, avoid these issues altogether.
• Energy Savings: Hydraulic and mechanical presses generally consume energy even when they’re idle, especially if the hydraulic system remains under pressure. Servo presses only use energy when the press is operating, significantly reducing power consumption.

Advantages of a Servo Electric Press

With these differences in mind, let’s take a look at some advantages of a servo electric press. Though this type of press isn’t an optimal fit for all tasks and applications, it offers several advantages which can be ideal for complex tasks and high-volume production.

1. Enhanced Precision and Control

One of the greatest advantages of a servo electric press is the superior control over the press cycle. Operators can fine-tune the exact force, speed, and position required for each application. This ensures that the press delivers consistent results, part after part, even when producing high volumes.

3. Energy Efficiency

Servo electric presses are among the most energy-efficient presses available. They use power only when needed, drastically cutting energy consumption compared to hydraulic presses, which need to maintain constant fluid pressure. Over time, this can lead to significant cost savings in energy bills, making them a more environmentally sustainable option.

4. Versatility in Applications

Servo presses can be adapted to perform a wide range of tasks, from heavy-duty metal forming to more delicate applications such as assembly and joining. Their ability to operate with different levels of force and adjust speed mid-cycle makes them ideal for materials of varying thickness and properties, enabling manufacturers to streamline multiple processes with a single machine.

5. Lower Maintenance Requirements

Servo electric presses generally require less maintenance compared to hydraulic and mechanical presses. With fewer parts susceptible to wear, and no reliance on hydraulic fluids, the risk of breakdowns is minimized. This not only reduces downtime but also lowers repair and replacement costs, improving long-term operational efficiency.

6. Quieter and Cleaner Operation

Hydraulic presses are notorious for their noise and fluid-based systems, which can result in spills or leaks. Servo electric presses are less noisy due to the nature of the electric motor, creating a more comfortable work environment. They also eliminate the risk of oil spills and contamination, leading to a cleaner and safer production space.

7. Real-Time Monitoring and Feedback

Servo electric presses are equipped with advanced sensors and feedback systems that allow operators to monitor the pressing process in real-time. This immediate feedback means that any adjustments can be made on the fly, helping to detect defects early and ensure consistent quality throughout the production run.

8. Programmable Flexibility

Manufacturers can pre-program different press profiles for various tasks, allowing for seamless transitions between different parts or processes. This makes servo electric presses ideal for production environments where multiple products are being produced on the same line, reducing changeover times and enhancing overall productivity.

9. Long-Term Cost Savings

While servo electric presses may have a higher initial investment compared to other press types with similar functionality, their long-term benefits—including reduced energy consumption, lower maintenance costs, and increased productivity—make them a cost-effective choice in the long run.

Servo electric presses are an invaluable tool in modern manufacturing, offering a unique combination of precision, flexibility, and energy efficiency. By enabling real-time control and feedback, reducing operational costs, and providing cleaner and less noisy operation, these presses can provide factories and businesses many advantages with the right application.

 

Servo presses are an important modern advancement in the world of manufacturing, offering exceptional precision and versatility. In this blog post, we’ll take a closer look at how servo presses work, as well as its ideal applications, and the advantages and disadvantages of using this technology.

What is a Servo Press?

First, what is a servo press? A servo press is a type of mechanical press that uses a servo motor to control its movement and force. Unlike conventional presses that rely on pneumatic or hydraulic systems, servo presses offer precise control over the press stroke, speed, and position. This level of control allows for greater accuracy and flexibility, which is important for many manufacturing processes. We’ll discuss these processes and applications in more detail later in the post.

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How Does a Servo Press Work?

The servo press operates by integrating a servo motor with the press mechanism. The servo motor converts rotary motion of the motor shaft into precise linear movements, which are then transmitted to the linear actuator output shaft. The output shaft applies the required force to the workpiece, shaping or assembling it as needed.

The key feature of a servo press is its programmable control system. This system allows operators to set precise parameters for each press cycle, including speed, position, and force. The servo motor’s feedback loop ensures that these parameters are met accurately, making real-time adjustments as needed.

Parts of a Servo Press

Let’s take a closer look at the parts of a servo press that make this system so efficient and precise. Keep in mind that there are different types of servo presses with different adjustments and augmentations, which may contain different parts. However, these are the main components which make a servo press work.

1. Servo Motor: The servo motor is the heart of the servo press, providing precise control over the press movements. The servo motor converts electrical signals into mechanical motion with high accuracy, allowing for detailed control over speed, position, and force. This precision enables complex operations that are difficult to achieve with conventional press systems.
2. Control System: The control system is a computer-based system that allows operators to program and monitor press operations. The control system includes a user interface for setting parameters, a processor for executing commands, and communication modules for interfacing with other machinery and systems. Advanced control systems often feature real-time monitoring and diagnostics to ensure optimal performance and quick troubleshooting.
3. Actuator: The part of the press that provides linear motion, applying force to the workpiece. The actuator is driven by the servo motor and is designed to deliver consistent and precise force throughout the press cycle. It can be equipped with various tooling attachments depending on the specific application.
4. Frame: The structure that supports the press and absorbs the forces generated during operation. The frame must be robust and rigid to maintain alignment and accuracy. It typically includes base plates, columns, and cross-members designed to withstand high loads and stresses while minimizing deflection.
5. Sensors: Used to monitor various parameters such as position, force, and speed, providing feedback to the control system. Common sensors in a servo press include load cells for force or distance monitoring, encoders for feedback on position and speed. These sensors enable closed-loop control, where real-time data is used to adjust operations dynamically.
6. Safety Mechanisms: These include emergency stop buttons, safety guards, light curtains, and interlocks designed to protect operators and prevent accidents. Safety mechanisms are integrated into the control system, ensuring the press can be quickly and safely shut down in an emergency.
7. Power Supply and Electrical Components: These provide the necessary electrical energy to the servo motor and control system. This includes transformers, power converters, circuit breakers, and wiring, all designed to ensure reliable and efficient power delivery.
8. Tooling Interface: The interface where various tools and dies are mounted on the ram and the press bed. This interface must be highly adaptable to accommodate different types of tooling and ensure quick and accurate changes between operations.

Advantages vs Disadvantages of a Servo Press

As previously mentioned, servo presses are ideal for applications that require high precision and flexibility. Since these machines are typically more expensive than other types of presses, it can be difficult to know when to choose a servo press, and when a traditional press might be appropriate. Understanding the advantages and disadvantages of a servo press, as well as how a servo press works, can be helpful.

Advantages of a Servo Press

• Precision: The ability to control every aspect of the press cycle ensures high accuracy and repeatability.
• Flexibility: Programmable settings allow for quick changes between different tasks and processes.
• Energy Efficiency: Servo motors use energy more efficiently than traditional hydraulic or mechanical systems.
• Reduced Noise and Vibration: Quieter operation and less wear and tear on components.
• Improved Quality Control: Real-time monitoring and adjustments lead to consistent, high-quality output.

Disadvantages of a Servo Press

• Cost: Higher initial investment compared to traditional presses.
• Complexity: More advanced technology requires skilled operators and maintenance personnel.
• Maintenance: Although servo presses are generally reliable, they can be more complex to repair. If issues arise, the actuator would most likely have to be sent back to the manufacturer for evaluation.

Servo presses represent a significant leap forward in manufacturing technology, offering unparalleled precision, flexibility, and efficiency. Understanding how a servo press works and its advantages and disadvantages can help manufacturers make informed decisions about integrating this technology into their operations. If you’re interested in a servo press for your business or factory, contact us. We can help you find the perfect servo press for your applications.

A Servo Electric Press is a system that uses a linear actuator controlled by an AC or DC servo motor to deliver linear motion, similar to a press cylinder. Servo presses utilize ball or roller screws to offer precise control over speed, position, and force. Though a servo press isn’t necessary for all applications, it can be ideal for some. In this blog post, we’ll take a look at a few advantages and disadvantages of a servo press, and when this type of press might be the best choice for your application.

What is a Servo Press?

A servo motor is typically an AC brushless electric motor that uses either an open-loop or closed-loop motion control system. Open-loop control systems do not incorporate any feedback in operation – these systems simply follow directions from the controller without reading output or sending data back to modify input.

Conversely, a closed-loop system, that’s more commonly used today, is controlled by motor feedback signals that make it possible to make micro adjustments to positioning, speed, and torque automatically as needed. As commands are being sent to the motor, a sensing device called an encoder sends positional, speed, and directional data back to the control system based on output. Torque feedback is also sent back to the control system which helps measure the force exerted by the linear actuator. This allows a servo press to be able to work with great precision, accuracy and control. Servo presses have many advantages as an option for industrial production.

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Advantages of a Servo Electric Press

High Accuracy

The positional feedback system within the servo motor press creates a highly accurate operation. The system has the ability to make very fine adjustments to meet the needs of the process. This is ideal for jobs with tight tolerances, or those working with very expensive materials.

Repeatability

Servo presses not only operate with a high level of accuracy, but their operation is steady and repeatable. Even as loads on the motor change, the controls can adjust accordingly to achieve the desired results. If the demands on the press frequently change, a servo electric motor is optimally designed to meet these needs.

Exceptional Control

The closed loop control system allows the press to operate with a very high degree of control. Though these presses can operate quickly, and with great power, they can also be carefully and precisely adjusted. The actuator’s positional feedback provides an incredible degree of control to the speed and position of the actuator.

High Powered

Even operating with high accuracy and control, the servo electric press does not sacrifice power. These types of presses can work with delicate materials and highly precise processes as well as very tough materials requiring a great deal of force.

Quiet

Many high-powered motors are also very loud which require your operators to have hearing protection when in their proximity. A servo motor press is electrically powered, and produces very minimal noise only during the press cycle.

Fast

A servo motor press can work very quickly, up to speeds of around 300mm/s. The feedback loop system allows the motor to adjust itself as needed, without interfering with the pressing process. When it’s important to produce components or complete jobs quickly and with great efficiency, a servo motor press may be ideal.

Disadvantages of Servo Motor Presses

Though servo motor presses have many advantages, there are also some disadvantages. It’s important to balance these factors to find the right press for your needs.

High Cost

As previously discussed, the servo motor operates smoothly, accurately, quickly, and can produce a great deal of power. However, this optimal performance comes at a cost. Servo electric presses tend to come with higher initial costs to most other types of presses, including full hydraulic options.

Complex

Servo motors are more expensive generally because they use more complex construction and components. This also means they have more expensive parts and are difficult to maintain. While most presses have a range of issues that can be addressed with in-house maintenance, servo press components will most likely need to be sent back to the factory for repair. Extra components, emergency maintenance and off-site maintenance can be costly and time-consuming.

High Voltage

The high power output offered by servo machinery also comes with high power supply. Most servo press machinery requires either 480 or 240V of electricity, which increases potential safety risks for an operation compared to low or no voltage options like pneumatic presses.

Specific Applications

Servo presses can perform a range of applications and can offer advantages for jobs with very tight tolerances, where precision and accuracy are an extremely high priority such as in medical device or aerospace manufacturing. Servo actuators are used outside of assembly to control the function of many products, like robots, drones and other electronics. With such precise operation from a closed-loop feedback system, servo actuators are even used to control the function of several vehicles in operation, like controlling steering motion or the speed of aircraft, submarines and automobiles.

If this level of precision and functionality isn’t essential for your applications, you may be needlessly overspending. It’s helpful to have details about your applications to choose a press, including the materials you’re working with, the dimensions of the workpiece, and the type of operation you’re conducting. This will help you get the right amount of force for your press, and get the right type of press.

Is a Servo Press Right For You?

There are many different types of presses to choose from for your application. Finding the right design and configuration requires some careful consideration and planning. If your process requires a great deal of accuracy, precision, and smooth operation, a servo press might be ideal for you. However, many of these complex processes can also be performed with a force and distance monitoring air over oil press for a fraction of the cost and there may be a range of pneumatic, hydropneumatic and even hydraulic options that could provide the capabilities you need with a higher return on investment.

If you’re looking for a high-quality factory press and you’re not sure about the optimal construction, contact us. Our press experts can help you find a press that is highly functional as well as cost-effective and quote either a servo press or alternative, designed to meet your needs.

Now more than ever, access to data provides the ability for process improvement and fine tuning performance for quality assurance. Without the right data, it’s difficult to identify or fully understand a problem, and even harder to solve it. The right tools can give you the information you need to take a closer look at your production line. One of these such tools is force and distance monitoring on factory presses.

What Data is Collected with Force & Distance Monitoring?

Force and distance process monitoring collects data from each press cycle that gives insight into part quality and product specs, particularly the pass or fail performance of machinery that can determine whether a part that’s assembled is up to quality standards and can move through the production line and into the field. The quality assurance capabilities alone make the data from force and distance monitoring highly valuable.

However force and distance monitoring equipment actually collects a range of data that assists beyond identifying defects and can help signal need for repair as well as other issues that can affect production and improve issue response. Storing and referring to this data over time can also help you to identify trends and aid a whole host of common problems in manufacturing and assembly operations. Let’s take a look at the problems that force and distance monitoring can help solve.

7 Problems Force and Distance Monitoring Can Solve

1. Identifying Quality Assurance Problems

Force and distance monitoring tools allow managers and engineers to track the production of specific parts by serial number, and monitor the performance of individual machines. The main function of force and distance monitoring equipment is reading force and distance achieved for each press cycle and determining pass or fail for a part’s assembly. When parts show faults, they can be removed from batching. When the cycle readings are off consistently, this may also signal necessary process modification or machine maintenance to bring a particular machine’s output back up to standards for consistent, repeatable production quality.

2. Minimize Field Failures

Faulty parts can be an expensive problem. The harder it is to identify where and how the fault started, the more expensive the problem becomes, especially if faulty parts have made it to the field and recalls are required as a result. Data-gathering tools like force and distance monitoring will show when a process didn’t meet parameters, and how long this occurred. This allows managers to quarantine the problem parts and improve the process that caused that fault, which can greatly reduce or even eliminate faulty products from making it to the final production stage or out to consumers.

3. Identify Slow-Downs & Bottlenecks

Not all production issues are extreme enough to cause faulty parts. Some incidents simply slow down production processes and eat into efficiency. Collecting and analyzing force and distance monitoring data across machines and over time can help to identify these issues. Trend reports can show, over time, how much production has slowed, and when it started. Analyzing patterns can help you determine if these slow-downs are a regular occurrence, if a machine has been losing efficiency for some time, or if another issue is occurring, like a fault within the machine itself that will require maintenance.

Comparing data across each process can help managers and engineers identify costly bottlenecks. Assessing the data can also help to provide the best solution, whether that means rearranging processes to better organize the timeline, using multiple machines to speed up processes causing a bottleneck, or something else.

4. Minimize Experimentation

Data simulations are extremely useful tools for analyzing potential process improvements or changes. This allows you to visualize the change before making any expensive reworks. This also allows you to assess performance under each condition, and see whether or not new features or test limits, for example, are adding real value to your production or not.

5. Detect Defects Before They Occur

Data monitoring allows managers and engineers to isolate key process variables and use these to determine when product defects are likely to occur. Regularly reviewing process data, making notes of product and process faults, and changing test limits accordingly, can allow for prediction of impending failure conditions before they happen. This can also help managers stay on top of maintenance, and make sure that machines are repaired or maintained before they reach failure conditions.

6. Reporting and Decision-Making

Gathering information on your production process and organizing this data by part and process not only gives you valuable insight into how each process is performing, but also makes reporting easier. When making assessments on a press process, force and distance monitoring machines give you access to important metrics that you can use in decision-making, whether that means analyzing new features, setting test limits, developing a new test strategy, making necessary equipment upgrades or something else.

Regardless of industry, data is the most powerful asset for assessing and solving problems and ensuring consistent product quality. With the right data in manufacturing, you can read insights into the performance of your machines, the quality of your parts, and track parts moving through production, to stay on top of any problems. If you’re interested in modifying your factory production with force and distance monitoring capabilities, contact us – we would be happy to tell you more about the data that can be collected, how it can be used, and what you can expect.