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Plant factory pneumatic actuators and pneumatic automation

Plant factory pneumatic actuators and pneumatic automation

By integrating smart actuators into their equipment, machine designers give end users the ability to switch motor direction within the actuator itself. This low-level switching capability relieves users of the need to control an external H-bridge, and to install and maintain the heavy wiring needed to support it. Smart actuators require only two wires for power and a few thin control wires for communication with a simple switch, final element, programmable logic controller PLC , or other controller. This feature enables communications with network buses such as those using the J Controller Area Network CAN bus protocol for integration with other applications.

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Automation

VIDEO ON THE TOPIC: PEW-PEW! Pneumatic Automation - Industrial Lego

The debate surrounding the pros and cons of electric and pneumatic actuators has been raging for years and still no easy answer exists. Here, with the help of Bimba Manufacturing, we focus on the core differentiators to help narrow your decision. If there is any significant performance differentiator, it is that electric actuators are better known for their high levels of precision.

Though this is not to say pneumatic actuators cannot deliver very precise motion. Again, the issue here revolves around how much precision you really need.

For help on this issue, we referred to information from Bob Kral at Bimba Manufacturing Company, a supplier of pneumatic, electric and hydraulic actuators. According to Kral, the choice of pneumatic or electric actuators involves an evaluation of performance, component costs, system costs, and productivity gains. The two technologies are so different that one cannot be a drop-in replacement for the other. Each has inherent advantages and disadvantages. The case for pneumatic actuators Pneumatic actuators provide high force and speed at low unit cost in a small footprint.

As a matter of fact, pneumatic cylinders provide more force and speed per unit size than any other actuator technology except hydraulic. Force and speed on pneumatic actuators are easily adjustable and are independent of each other. Pneumatic actuators are most economical when the scale of deployment matches the capacity of the compressor. Small compressors are efficient and economical when used to power a small number of pneumatic devices.

Large compressors are efficient and economical when powering a large number of pneumatic devices. While pneumatic component costs are low, maintenance and operating costs can be high, especially if a serious effort has not been made to quantify and minimize the costs.

Maintenance and operating costs include replacement cylinder costs, air line installation and maintenance, and electricity for the compressor. According to the Department of Energy, 24 percent of the annual cost of compressed air is due to maintenance, equipment and installation while 76 percent is due directly to the cost of electricity for the compressor. Determination of the operating cost per pneumatic device deployed in a facility can be eye opening, especially if cost calculations have not been done for a while and the scale of operations has shrunk.

The case for electric actuators In contrast to pneumatics, electric actuators provide precise control and positioning, help adapt machines to flexible processes and have low operating cost. They are most economical when deployed in a moderate scale in processes where their performance advantages can be a benefit and when the electronics are separate from the actuator to segment and minimize replacement costs. Electric actuators consist of a ball, acme or roller screw connected via a coupler to an electric motor.

As the screw turns it moves a piston, which is connected to the rod or carriage. The rod or carriage moves the load. Performance varies depending on materials used. Commonly used motors for electric actuators include steppers and servos. Brush dc motors and ac motors are sometimes used with limit switches when positioning accuracy is less critical.

Step motors are an economical choice for accurate positioning at lower speeds. However, steppers may lose synchronization with the controller when employed open loop without an encoder or if they are undersized for an application. Servos, by definition, are closed loop and provide superior performance at high speeds, albeit at a higher cost.

High precision screws and anti-backlash mechanics can provide accuracies to ten-thousandths of an inch. Standard precisions with standard components range from a few hundredths to a few thousandths of an inch. Components of an electric actuator include the mechanical actuator that translates motor rotation to linear speed and thrust, the motor, an electronic driver or amplifier to power the motor, and a controller to control motion.

Operating costs of electric actuators are largely due to motor power draw. While component costs of electric actuators are high, operating costs are low. High component costs often deter the use of electric actuators because savings in operating costs compared to pneumatics are often not adequately considered or are outright ignored.

Cost comparison To better compare actual costs between pneumatic and electronic actuators, consider this example: Manual changeovers adapting a production line to a different product can be expensive in terms of both lost production and man-hours required to implement the change. Because electric actuators can substantially reduce changeover costs largely due to the fact that they can retain condition settings , the annual cost savings associated with changeovers must be considered as part of the implementation decision.

See the complete Bimba Manufacturing Company white paper comparing pneumatic and electric actuator options, which provides in depth details on operating cost calculations.

Home Products Motion How to Decide Between Pneumatic and Electric Actuators The debate surrounding the pros and cons of electric and pneumatic actuators has been raging for years and still no easy answer exists. David Greenfield. Examples of pneumatic left and electronic actuators from Bimba Manufacturing Company.

Schmidt Couplings Connect Offset Shafts Zero-Max Schmidt offset couplings provide machine designers with a proven method to ensure that machines operate with constant phase accuracy and constant speed throughout the rotation and cycle. Zero-Max, Inc. XZ-Axis Motorized Linear Positioning Stages The XZ series of motorized m linear motion positioning stages feature 1 micron repeatability and 10 micron positional accuracy.

Carlo Gavazzi. ANCA Motion. Anne Marie Mohan. Schneider Electric. Machines that sense the world around them ADI gives cobots the ability to sense, adapt and interpret its surroundings. Our motion detection and machine learning expertise is transforming factory floors.

From invention to breakthrough with ADI. Pneumatic Function Integration on One Controller Though Festo first released its Motion Terminal two years ago, it continues to develop software upgrades that expand its range of capabilities. Aaron Hand. Stephanie Neil. Festo Corporation. Applied Motion Products. Rotary Lobe Pumps Alfa Laval OptiLobe 10 and OptiLobe 50 pumps are now available in four new sizes to meet the requirements of lower flow rates and higher production capacities.

When it comes to selecting encoders for motion control applications, the terms resolution, accuracy, and precision are often used interchangeably. However, they mean very different things and understanding the difference can be critical to your application.

How OEMs Can Improve Their Machines' Material Handling Capabilities In this podcast, sponsored by Beckhoff Automation, we learn how new automation technologies for material handling offer significant advantages to machinery OEMs targeting packaging, assembly, sorting, and order picking operations.

ABB Inc.

The Group offers MerSETA-accredited training programmes and courses for hydraulics, pneumatics and automation aimed at various degrees of specialist operation. We also offer eLearning programmes. Omal pneumatic actuators are accurately designed and engineered, and have a state-of-the-art production line dedicated to their fabrication.

The Group offers MerSETA-accredited training programmes and courses for hydraulics, pneumatics and automation aimed at various degrees of specialist operation. We also offer eLearning programmes. World-renowned brand Aventics is incorporated into this niche product line, allowing Tectra Automation to guarantee both product quality and longevity. Tectra Automation is a leading designer and installer of tailored pneumatic systems and components as well as pneumatic solutions for the packaging, manufacturing and other high-tech industries.

Example of pneumatic system

A valve actuator is the mechanism for opening and closing a valve. Manually operated valves require someone in attendance to adjust them using a direct or geared mechanism attached to the valve stem. Power-operated actuators, using gas pressure, hydraulic pressure or electricity, allow a valve to be adjusted remotely, or allow rapid operation of large valves. Power-operated valve actuators may be the final elements of an automatic control loop which automatically regulates some flow, level or other process.

Pneumatic Systems

Springer Shop Bolero Ozon. Birendra Prasad , S. Dwivedi , R. The complete shop floor automation - a "lights out factory", where workers initially set up all machines, turn off the lights, lock the door and the machine churns up the parts - remains an unfulfilled dream. It is our nature to be dissatisfied with near term progress, but when we realize how short a time the tools to do that automation have been available, the progress is clearly noteworthy - considering the multitudes of factors and the environment we have to deal with. Most of the automa tion problems we confront in today's environment are multidisciplinary in nature. They require not just the knowledge and experience in various distinct fields but good cooperation from different disci plined organizations to adequately comprehend and solve such problems.

SEE VIDEO BY TOPIC: SMC - Fms200. Automation Station working at Palo Alto College
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The benefits of pneumatic power can be realized by following some basic pneumatic design rules for specifying air preparation units, actuators and valves. Compressed air use by industrial machines is a close second to the use of electricity in terms of cost, and well ahead of other utilities such as water and natural gas in most plants and facilities. Electricity is less expensive per dollar of unit energy, but compressed air and pneumatics have other advantages encouraging their use. This article will show why pneumatics is such a popular linear power option. Basic pneumatic valve selection will also be discussed—along with a primer on sizing pneumatic air preparation units, and selecting pneumatic valves and actuators. Linear power transmission is typically done with fluid pneumatic with air or hydraulic with oil or electric power. Many vendors like to promote use of electrical actuators and their efficiency, yet simple and reliable pneumatic actuators and cylinders still often drive linear motion.

Bottling plant improves efficiency with electric actuators

Pneumatic-cylinder actuators are durable with low initial cost, so have been a staple in factory automation equipment for decades. They are simple, easy to maintain and provide reasonable control over moving axes in industrial plants. The case for switching to electric actuators usually focuses on how motor-based linear motion controls position, speed, acceleration and force with more accuracy and repeatability. The truth is that electric actuators have both higher performance and initial cost.

Hydraulic and pneumatic devices are all around us. They're used in manufacturing, transportation, earthmoving equipment and common vehicles we see every day. The brakes on your car are hydraulically operated; the garbage truck that passes weekly by your house uses hydraulic power to compact trash.

The debate surrounding the pros and cons of electric and pneumatic actuators has been raging for years and still no easy answer exists. Here, with the help of Bimba Manufacturing, we focus on the core differentiators to help narrow your decision. If there is any significant performance differentiator, it is that electric actuators are better known for their high levels of precision. Though this is not to say pneumatic actuators cannot deliver very precise motion. Again, the issue here revolves around how much precision you really need. For help on this issue, we referred to information from Bob Kral at Bimba Manufacturing Company, a supplier of pneumatic, electric and hydraulic actuators. According to Kral, the choice of pneumatic or electric actuators involves an evaluation of performance, component costs, system costs, and productivity gains. The two technologies are so different that one cannot be a drop-in replacement for the other. Each has inherent advantages and disadvantages.

This press features features a pneumatic control that requires the operator keep largest and most advanced research, development, and manufacturing facility.

Pneumatic Actuator

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Valve actuator

With accounts departments leaning hard on engineers to deliver lower operating costs, increasing numbers are turning to the latest electric actuator solutions. Well, the design features of electric linear actuators mean they are able to deliver enhanced performance levels while also achieving lower total energy consumption. In pneumatic systems, two steps are necessary to produce compressed air: electricity first produces air, before air pressure is converted into linear movement using a pneumatic cylinder. Similarly, two stages are required in a traditional electric solution, namely converting motor rotation to the movement of the electric actuator. However, this double step can be reduced, with subsequent energy savings, by using a linear motor rod-style actuator solution such as a Parker ETT series unit, which is able to directly generate linear motion through the principle of electro-magnetism. Another favorable attribute of an electritic linear motor actuator compared versus a pneumatic actuator solution is the precise positioning achievable along its entire stroke. On-board feedback via an integrated analogue linear position sensor allows positioning precision to within 0. The technical advantages of the latest electric linear motor actuators are clear, but what about the cost comparison we hear you ask? Well, consider electric actuators applications and performance. A typical application involving the transfer of a 15kg load at 30 cycles per minute, for example.

How to Decide Between Pneumatic and Electric Actuators

AOX-P series small spring return pneumatic rotary actuator are specifically designed to quarter turn ball, butterfly, plug valves and dampers for complete valve automation solutions. AOX, founded in , is a leading manufacturer of small spring return pneumatic rotary actuator in China. We provide the best quality products with high technology, high performance and satisfactory service.

Actuators/Positioners

There is a spring inside the spring return pneumatic actuator. When the air source is disconnected, the spring will automatically reset, providing the power to restore the valve to the initial open or closed state. The body of AOX-P spring return pneumatic acuator is extruded aluminum body with corrosion protection having honed cylinder surface for longer life and low coefficient of friction. AOX-P spring return pneumatic acuator has modular preloaded spring cartridge design,with coated spring for simple versatile range, greater safely and corrosion resistance, longer cycle life.

Spring Return Pneumatic Actuator

Interest is growing in using electric motor-powered actuators for process control. Pneumatic actuators have been the dominant technology for almost a century; they were in use prior to World War II. The rapid advances in boiler controls precipitated by the war secured their position as the dominant technology for powering and controlling the process valves. With the advent of advancements in control such as the introduction of milliamp control signal technology and later digital BUS technology, pneumatic control positioners have kept pace with the advancing control requirements for pneumatically powered actuators.

2/20/2018 | The Maintenance Engineer’s Guide to Industrial Actuators

An engineering system contains multiple components that interconnect to perform a specific task. Starting from basic fundamentals through to advanced applications, Sensors and Actuators: Engineering System Instrumentation, Second Edition thoroughly explains the inner workings of an engineering system. The text first provides introductory material—practical procedures and applications in the beginning—and then methodically integrates more advanced techniques, theory, and concepts throughout the book.

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