proportional hyd valve | PLCS.net - Interactive Q & A

To do it very crudely you could make it proprtional only:

Error = set position - actual position
Intermediate result = Error * gain
Valve command = intermediate result clamped to limits
&#;

The company is the world’s best hydraulic proportional valve supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

By varying the gain and the clamps you alter the proportional band and the maximum velocity. This is a very crude method and will never reach the actual setpoint position. This may be all you require for your application.

If you require anything more sophisticated then I suggest that you speak to Delta Motion. If you still want to do it in a PLC then here are few things to think about:

Make a virtual master to generate a position setpoint; this must ramp up and down producing a position setpoint and a velocity demand.

The servo valve will need to be profiled in the software (non-linear) so that the velocity demand can be used to generate a valve command that generates approximately the correct velocity of the axis.

Make a PID function based on the demand position from the virtual master and the actual position from your cylinder then sum the PID output with the predicted valve command to correct the position error.

I should also add that you will need a fast PLC and fast I/O with response times < 5mS to make a decent job of it.

Good luck,

Nick

It is posible to do this with a PLC but to do it well is not a trivial task and the PLC will never match the performance/response of a dedicated motion controller.To do it very crudely you could make it proprtional only:By varying the gain and the clamps you alter the proportional band and the maximum velocity. This is a very crude method and will never reach the actual setpoint position. This may be all you require for your application.If you require anything more sophisticated then I suggest that you speak to Delta Motion. If you still want to do it in a PLC then here are few things to think about:Make a virtual master to generate a position setpoint; this must ramp up and down producing a position setpoint and a velocity demand.The servo valve will need to be profiled in the software (non-linear) so that the velocity demand can be used to generate a valve command that generates approximately the correct velocity of the axis.Make a PID function based on the demand position from the virtual master and the actual position from your cylinder then sum the PID output with the predicted valve command to correct the position error.I should also add that you will need a fast PLC and fast I/O with response times < 5mS to make a decent job of it.Good luck,Nick

Oct. 14,

Introduction:

When it comes to achieving precise and accurate control in hydraulic systems, selecting the right proportional valve is crucial. The proportional valve plays a significant role in regulating fluid flow, pressure, and direction within hydraulic circuits. In this comprehensive guide, we will discuss the key factors to consider when choosing the ideal proportional valve for your hydraulic system. Additionally, we will delve into Hydraulic valve troubleshooting, the importance of hydraulic valves for sale, and the benefits of a Double Selector Valve.

Understanding Proportional Valves:

Proportional valves are essential components that enable precise control of hydraulic systems. These valves operate by modulating flow rates to maintain desired pressure and deliver accurate positioning. By using electrical or electronic signals, proportional valves can achieve high accuracy, repeatability, and improved efficiency.

 

 

Factors to Consider for Selecting the Ideal Proportional Valve:

1. Flow Requirements:

Start by evaluating the flow requirements of your hydraulic system. Consider the maximum and minimum flow rates needed during operation. Proportional valves come in various sizes, each with different flow capacity ratings. Select a valve that can handle your system's flow demands while delivering accurate control.

Contact us to discuss your requirements of hydraulic solenoid valve suppliers. Our experienced sales team can help you identify the options that best suit your needs.

Additional reading:
Discover the Charm of Historic Bellville Springs
5 Facts About Belleville Disc Spring Washers
Ultimate Belleville Springs Calculator: Instantly Solve Spring Rate & Deflection!
Everything You Need to Know About Flange Bolt Washers
4 Advice to Choose a Spiral Bevel Gear for Reducer
Mud Mixing Systems
Gears | Spur | Helical | Bevel | Worm | Industrial Parts ...

2. Pressure Ratings:

Analyzing the required pressure levels within your hydraulic system is crucial. Proportional valves have specific pressure ratings that indicate their maximum working pressure. Ensure that the valve you choose can handle your system's pressure requirements without compromising accuracy or safety.

3. Response Time:

The response time of a proportional valve is vital for achieving precise control. It refers to how quickly the valve can react to changes in input signals. Consider your system's dynamic requirements and select a proportional valve with a response time that aligns with your application's needs. Faster response times are ideal for applications demanding quick adjustments.

4. Control Signal Compatibility:

Proportional valves require electrical or electronic control signals to operate accurately. Ensure that the selected valve is compatible with your system's control signal type, such as current or voltage. Check the valve's data sheet to verify compatibility and avoid potential compatibility issues during operation.

Hydraulic Valve Troubleshooting:

In hydraulic systems, troubleshooting is a critical skill when it comes to identifying and resolving valve-related issues. Some common hydraulic valve problems include leakage, erratic operation, inadequate flow, or incorrect pressure regulation. Proper troubleshooting involves rigorous inspection, component testing, and maintenance. It is recommended to consult a hydraulic systems expert or refer to the valve manufacturer's troubleshooting guidelines for accurate problem diagnosis and resolution.

Importance of Hydraulic Valves for Sale:

When selecting a proportional valve, it is beneficial to explore available options in the market. The availability of hydraulic valves for sale allows you to compare different manufacturers, models, and specifications. This enables you to make an informed decision and choose a valve that meets your requirements accurately. Additionally, purchasing from reputable suppliers ensures product reliability, aftersales support, and warranty coverage, contributing to the overall success of your hydraulic system.

Understanding the Double Selector Valve:

A double selector valve is a specialized type of hydraulic valve that allows fluid to flow between two distinct hydraulic circuits. This versatile valve enables operators to choose between different flow paths and selectively direct hydraulic power. Double selector valves find applications in complex hydraulic systems, enabling the efficient control of multiple actuators or devices.

Conclusion:

Selecting the ideal proportional valve for accurate control in hydraulic systems is a crucial task. By considering flow requirements, pressure ratings, response times, and control signal compatibility, you can make an informed choice that aligns with your system's needs. Regular hydraulic valve troubleshooting ensures uninterrupted performance. Exploring hydraulic valves for sale and understanding the benefits of a double selector valve expands your options, enabling you to optimize hydraulic system functionality, efficiency, and accuracy. 

 

 

Trust the experts! We focus on producing a huge range of electromagnetic directional valve wholesale,hot water recirculating pump check valve,flow control 2 inch check valve,hydraulic check valve block. We have wide shipping at great value. Welcome to check our product catalogue and you can directly contact us for further information.

If you are looking for more details, kindly visit hydraulic solenoid valve manufacturers.