Today's Linear Servos applications are more demanding than it has in the past. Higher precision, longer life, almost no maintenance, fewer moving parts, and the list goes on. Linear Servos companies always strive to meet these requirements and exceed them by continually creating new technology.
About ten years ago, it was difficult to find a commercially available Linear Servos that could travel 5 meters per second with straightness, load capacity and stiffness. Today there are many Linear Servos with these characteristics and are fairly cost effective.
Advancements in the Linear Servos encoder technology assist in higher speed operation too. Present day Linear Servos encoders and other devices are able to meet this challenge, are less noise susceptible, and cost less. Improvements in the Linear Servos mechanical drives have also moved forward. Ball screw's with higher accuracy and faster lead's result in higher throughput.
The maximum speeds of Linear Servos are limited only by the bus voltage and the speed of the control system. Usually Linear Servos have speeds around 3 meters per second with 1 micron resolution and over 5 meters per second, 200ips, with coarse resolution.
The accuracy, resolution and repeatability of Linear Servos are driven devices that are controlled by feedback. With a wide variety of Linear Servos feedback devices available, resolution and accuracy are primarily limited to a budget and control system.
The response rate of Linear Servos can be over 100 times greater than a mechanical transmission. This proves to be faster acceleration and settling times. Because there is no mechanical aspects to Linear Servos, increasing the stiffness is determined by gain and current. The spring rate of Linear Servos driven system can be more efficient than a ball screw driven device. This is limited; however, by the Linear Servos peak force, available current and Linear Servos resolution of the feedback. Because of the present Linear Servos have no contacting parts, there is no wear.
Linear Servos today are capable of breathtaking speeds and accuracies. These are founded on the basic principles of Michael Faraday and his discovery of a copper disc spinning within a horseshoe magnet creating the first generator.
The Linear Servos have come of age in the past decade, through a dramatic increase in practical and beneficial industrial applications. The Linear Servos were invented by Professor Eric Laithwaite, the British Electrical Engineer who died in December 1997 at the age of 76. It projected a shuttle across a weaving look using Linear Servos. Professor Laithwaite had been amused with the weaving process ever since his childhood living in the UK's textile manufacturer home.
Professor Laithwaite described his invention of Linear Servos as "no more than an ordinary electric motor, spread out". The principle created magnetic fields on which an object rested and travelled without being slowed by friction. Laithewaite pioneered the commercial department of the first Linear Servos applications, developing direct linear drives for both machinery and transport.
Linear Servos have evolved in different guises but the most common is the tubular type, flat of "U" channel type Linear Servos, which is finding increasing because of their low profile and high powered output. Most linear motors are assumed to use brushless technology.
A Linear Servos can be flat, U-channel, or tubular. The best types of Linear Servos to use are dependent on the application's specifications and operating environment.
Cylindrical moving magnet Linear Servos - The coil assembly is cylindrical and travels up and down a cylindrical bar or magnetic way. The Linear Servos were one of the first to be used in a commercial application. However, they do not share the same characteristics of the flat and U channel Linear Servos.
U Channel Linear Servos - The u channel Linear Servos have two parallel magnet tracks facing each other with the coil assembly between the plates. The coil assemblies of Linear Servos are supported in the magnetic way by a bearing system. The Linear Servos coil assemblies are ironless, showing no attractive force and no disturbance forces generated between coil assembly and magnetic way. The u channels Linear Servos have low mass providing a very high acceleration rate.
Slotless ironless flat Linear Servos - The slotless, ironless flat Linear Servos are a series of coils mounted to an aluminum base. Because of the lack of iron in the coil assembly, the motor has no attractive force or cogging, in which the U-channel Linear Servos have. A Linear Servos are ideal for smooth velocity control and great for applications requiring scanning. It yields the lowest force output of a flat track Linear Servos design.
Slotless iron flat Linear Servos - The slotless, iron flat Linear Servos are similar to the slotless ironless flat Linear Servos, except the coils are mounted to iron laminations and then to the aluminum base. Iron laminations help direct the magnet field and therefore increasing the force. Because of the laminations of iron in the coil assembly, an attractive force is present between the magnetic way and coil assembly of the Linear Servos. As a result, a cogging force is present on the motor.
Slotted iron flat Linear Servos - The slotted iron flat Linear Servos have coil windings that are inserted into a steel structure creating the coil assembly. The iron core's advantage increases the output force allowing the motor's magnetic field being created by the winding. The attractive force of a Linear Servos iron-core and the magnet track can be used as a preload for an air bearing system. However, a Linear Servos force can cause an increase in the bearing wear. Cogging forces will exist but can be reduced by skewing the magnets of the slotted iron flat Linear Servos.
Linear Servos can offer many advantages over mechanical systems. Some points include high and very low speeds, faster acceleration, and almost no maintenance and little backlash.
The following environmental and safety considerations must be observed during all phases of operation, service and repair of a linear servo motor system. Failure to comply with these precautions violates safety standards of design, manufacture and intended use of Linear Servos. Please note that even a well-built Linear Servos operated and installed improperly, can be hazardous. Precaution must be observed by the user with respect to the load and operating environment. The customer is ultimately responsible for the proper selection, installation, and operation of Linear Servos.
The atmosphere in which a Linear Servos are used must be conducive to good general practices of electrical/electronic equipment. Do not operate the Linear Servos in the presence of flammable gases, dust, oil, vapor or moisture. For outdoor use, Linear Servos must be protected from the elements by an adequate cover, while still providing adequate air flow and cooling. Moisture may cause an electrical shock hazard and/or induce system breakdown. Due consideration should be given to the avoidance of liquids and vapors of any kind. Contact the factory should your application require specific IP ratings. It is wise to install Linear Servos in an environment which is free from condensation, electrical noise, vibration and shock.
Additionally, it is preferable to work with the linear servo motor system in a non-static protective environment. Exposed circuitry should always be properly guarded and/or enclosed to prevent unauthorized human contact with live circuitry. No work should be performed while power is applied.
Do NOT plug in or unplug when power is ON. Wait for at least 5 minutes before doing inspection work on the linear servo motor system after turning power OFF, because even after the power is turned off, there will still be some electrical energy remaining in the capacitors of the internal circuit of the linear servo motor system.
Plan the installation of Linear Servos in a system design that is free from debris, such as metal debris from cutting, drilling, tapping, and welding, or any other foreign material that could come in contact with systemís circuitry. Failure to prevent debris from entering Linear Servos can result in damage and/or shock.
The following information is intended as a general guideline for wiring of Anaheim Automationís Linear Servos. Be aware that when you route power and signal wiring on a machine or system, radiated noise from the nearby relays, transformers, and other electronic devices can be inducted into the Linear Servos and encoder signals, input/output communications, and other sensitive low voltage signals. This can cause system faults.
WARNING - Dangerous voltages capable of causing injury or death, may be present in the linear servo motor system. Use extreme caution when handling, wiring, testing, and adjusting during installation, set-up, tuning, and operation. Donít make extreme adjustments or changes to Linear Servos and system parameters, which can cause mechanical vibration and result in failure and/or loss. Once Linear Servos are wired, do not run the system by switching On/Off the power supply directly. Frequent power On/Off switching will cause fast aging of the system components, which will reduce the lifetime of Linear Servos.
Strictly comply with the following rules:
• Follow the Wiring Diagram with all Linear Servos
• Route high-voltage power cables separately from low-voltage power cables
• Segregate input power wiring and linear servo motor power cables from control wiring and motor feedback cables. Maintain this separation throughout the wire run.
• Use shielded cable for power wiring and provide a grounded 360 degree clamp termination to the enclosure wall. Allow room on the sub-panel for wire bends.
• Make all cable routes as short as possible.
NOTE: Factory made cables are recommended for use in our linear servo motor systems. These cables are purchased separately, and are designed to minimize EMI. These cables are recommended over customer-built cables to optimize system performance and to provide additional safety for the linear servo motor system and the user.
WARNING - To avoid the possibility of electrical shock, perform all mounting and wiring of Linear Servos prior to applying power. Once power is applied, connection terminals may have voltage present.
The following information is intended as a general guideline for the installation and mounting of Linear Servos. WARNING - Dangerous voltages capable of causing injury or death may be present in the linear servo motor system. Use extreme caution when handling, testing, and adjusting during installation, set-up, and operation. It is very important that the wiring of Linear Servos be taken into consideration upon installation and mounting. Subpanels installed inside the enclosure for mounting system components, must be a flat, rigid surface that will be free from shock, vibration, moisture, oil, vapors, or dust. Remember that Linear Servos will produce heat during work, therefore, heat dissipation should be considered in designing the system layout. Size the enclosure so as not to exceed the maximum ambient temperature rating. It is recommended that Linear Servos be mounted in position as to provide adequate airflow. Linear Servos should be mounted in a stable fashion, secured tightly.
NOTE: There should be a minimum of 10mm between Linear Servos and any other devices mounted in the system/electric panel or cabinet.
NOTE: In order to comply with UL and CE requirements, the linear servo motor system must be grounded in a grounded conducive enclosure offering protection as defined in standard EN 60529 (IEC 529) to IP55 such that they are not accessible to the operator or unskilled person. As with any moving part in a system, Linear Servos should be kept out of the reach of the operator. A NEMA 4X enclosure exceeds those requirements providing protection to IP66. To improve the bond between the power rail and the subpanel, construct your subpanel out of zinc-plated (paint-free) steel. Additionally, it is strongly recommended that the linear servo motor system be protected against electrical noise interferences. Noise from signal wires can cause mechanical vibration and malfunctions.
Anaheim Automation was established in 1966 as a manufacturer of "turnkey" motion control systems. Its' emphasis on R&D has insured the continued introduction of advanced motion control products, such as Linear Servos. Today, Anaheim Automation ranks high among the leading manufacturers and distributors of motion control products, a position enhanced by its excellent reputation for quality products at competitive prices. Linear Servos are no exception to the Companyís goal.
Anaheim Automation offers a variety of standard Linear Servos. Occasionally, OEM customers with mid to large quantity requirements prefer to have a linear servo motor that is custom or modified to meet their exact design requirements. Sometimes the customization is as simple as shaft modification, brake, oil seal for an IP65 rating, mounting dimensions, wire colors, or label. Other times, a customer might require that Linear Servos meet an ideal specification such as, speed, torque, and/or voltage.
Engineers appreciate that Anaheim Automation's Linear Servos can answer their desire for creativity, flexibility and system efficiency. Buyers appreciate the simplicity of the "one-stop shop," and the cost savings of a custom linear servo motor design, while engineers are pleased with Anaheim Automation's dedicated involvement in their specific system requirements.
Anaheim Automation's standard linear servo motor product line is a cost-effective solution, in that they are known for their rugged construction and excellent performance. A considerable size of its sales growth has resulted from dedicated engineering, friendly customer service and professional application assistance, often surpassing the customer's expectations for fulfilling their custom requirements. While a good portion of Anaheim Automation's linear servo motor sales involves special, custom, or private-labeling requirements, the company takes pride in its standard stock base located in Anaheim, California, USA. To make customization of Linear Servos affordable, a minimum quantity and/or a Non-Recurring Engineering (NRE) fee is required. Contact the factory for details, should you require a custom linear servo motor in your motion control system design.
All Sales for customized or modified Linear Servos are Non-Cancelable-Non-Returnable, and a NCNR Agreement must be signed by the customer, per each request. All Sales, including customized Linear Servos, are made pursuant to Anaheim Automation's standard Terms and Conditions, and are in lieu of any other expressed or implied terms, including but not limited to any implied warranties.
Anaheim Automation's customers for the Linear Servos are diverse: companies operating or designing automated machinery or processes that involve food, cosmetics or medical packaging, labeling or tamper-evident requirements, assembly, conveyor, material handling, robotics, special filming and projection effects, medical diagnostics, inspection and security devices, pump flow control, metal fabrication (CNC machinery), and equipment upgrades. Many OEM customers request that we "private-label" Linear Servos, so that their customers stay loyal to them for servicing, replacements and repairs.
PLEASE NOTE: Technical assistance regarding its linear servo motor product line, as well as all the products manufactured or distributed by Anaheim Automation, is available at no charge. This assistance is offered to help the customer in choosing Anaheim Automation products for a specific application. However, any selection, quotation, or application suggestion for Linear Servos, or any other product, offered from Anaheim Automation's staff, its' representatives or distributors, are only to assist the customer. In all cases, determination of fitness of custom Linear Servos in a specific system design is solely the customers' responsibility. While every effort is made to offer solid advice regarding Linear Servos, as well as other motion control products, and to produce technical data and illustrations accurately, such advice and documents are for reference only, and subject to change without notice.