Motion Control – Low Cost, Highly Reliable Solenoid Control Modules Available from OES!

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Van Nuys, CA – — Motion Control Components– – Optimal Engineering Systems, Inc. (OES) offers seven types of advance solenoid control modules including: Pick-and-Hold Driver, Proportional (PWM) Driver, Closed Loop Solenoid Process Control, Pick-and-Drop, Load On-Off Power Cycling, Dual Proportional Valve Controller, and Serially Controlled Solenoid Driver modules. Applications of these compact modules measuring just 3.000 in. x 3.000 in. include: Solenoids, valves, actuators (including Voice Coils), DC motors, electromagnets, hydraulics, LEDs, power amplifiers for electro-pneumatic proportional valves, and pressure and flow control valves.

To precisely fit an application there are multiple variations of each of the seven basic types of modules listed above to select from, for example: Single device – low side driver, two device – low side driver, single device – selectable low and high side driver, two device – selectable low and high side driver, +50 VDC or +80 VDC versions, currant versions, serially controlled, and Bi-directional load cycling versions to name just a few.

Stand features of these compact, low cost off-the shelf, modules are: High efficiency, microcomputer based, very high reliability, simple supply from +9 VDC to +50VDC, and High output current 15 Amps peak , 4 Amps RMS. The modules also incorporates a Flyback (Snubber, Freewheeling) Diode per Output device. For details on each type of module and all the variations available go to http://www.oesincorp.com/solenoidelectronics.htm.

Optional accessories are: Solenoid Commander card, Solenoid Control Module, DIN Rail Mounting Bracket, Track Ball and Joystick controllers, Solenoid Control System, and various solenoids. Additionally, all components can be order as a complete Plug-and-Play System.

About OES Optimal Engineering Systems, Inc. (OES) is a manufacturer of motion control products including: Stepper motor controllers and drivers, solenoid electronics, and positioning stages and slides. Applications include: Animation, automated assembly systems, automation, CNC machines, flight simulation, inspection systems, linear and rotary stages, machine tools, medical devices, motion control camera boom systems, optical comparators, CMMs, pan-tilt gimbals, PCB assembly & inspection, pick-and-place, positioning stages, robotics, scanners, security cameras, telescope drive mechanisms, time-lapse photography and winders

Some of the industries OES serves are: Aerospace, Astronomy, Chemical, Communications, Educational Institutes, University, Colleges, Government Agencies, National Labs, Manufacturing, Medical, Metrology, Military, Motion Control, Museum, News Agencies, Semiconductor and Test Equipment. Optimal Engineering Systems, Inc’s. competitive advantage is its state-of-the-art in-house manufacturing facility in North America enabling OES to supply clients with custom designed orders or high volume just-in-time deliveries globally.

For additional information contact Customer Service at Optimal Engineering Systems, Inc. (OES) , 6901 Woodley Ave, Van Nuys, CA 91406; Tel: 888-7071-1826, +1 (818) 222-9200, E-Mail: sales@oesincorp.com or visit the website at http://www.oesincorp.com

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Motion Control – Voice Coil Motor Features Higher Continuous Force and More Than 3 Times the Peak Force!

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Van Nuys, CA – Motion Control Components – Moticont has added a new, higher continuous force, higher peak force linear voice coil motor to it’s series of 2.750 in. (69.9 mm) diameter x 3.50 in. (88.9 mm) long (housing) voice coil motors. The LVCM-070-089-03 linear voice coil motor features 40.86 lbs. (181.5 N) continuous force and 129.1 lbs. (573.4 N) peak force. This clean, quiet, efficient, low inertia, high acceleration, brushless high speed linear motor has zero cogging and features high accuracy, and a high repeatability to less than1 micron (0.00004 in.) when operated in a closed loop as a DC servo motor

This compact, more powerful motor is ideal for: work holding and clamping, antenna positioning, medical devices, assembly, testing, laser machining and drilling, wafer handling, optical focusing, dynamic vibration absorption, scanners and laser beam steering and filtering. The LVCM-070-089-03 linear voice coil motor linear motor has a stroke length of 1.00 in (25.4 mm). and is easily added to new or existing applications using 10-32 UNC-2B mounting holes on each end of the motor which can be order as a complete plug-and-play system including an encoder and controller.

Is there a need for a smaller or larger diameter motor, one with longer travel, or more force? There are 12 series of Moticont’s LVCM series motors based on diameter of the motor, and over 50 models based on length of stroke and/or force to select from. To find the right motor for you application go to http://moticont.com/voice-coil-motor.htm

About Moticont – Moticont is a manufacturer of motion control products. Their product line includes voice coil motors, three phase brushless motors and positioning stages and slides.

Moticont is committed to exceeding Our customers’ quality expectations and industry standards throughout the design, manufacturing, service and technical support phases. Our modern manufacturing facility, highly controlled processes, committed staff, and extensive testing complement our product design strengths. This enables us to supply our clients with specialized small orders to high volume just-in-time deliveries.

We offer an extensive line of standard products ready to be shipped immediately from stock, and when standard products are not quite right for an application, highly trained design engineers are always available to develop custom motion control products to fit the specific needs or our customers.

For additional information contact Sales Team at Moticont, 6901 Woodley Ave, Van Nuys, CA 91406; Toll Free: +1 (888) 785-1804, Tel: +1 (818) 785-1800, moticont@moticont.comor visit the website at http://www.moticont.com

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Motion Control Tutorial – Slotted vs. Slotless Motor Technology

Motion Control Tutorial – Slotted vs Slotless 

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Motion Control Tutorial – When first introduced, brushless DC motors, despite their many advantages, were cast as a costly alternative to brush-commutated motors and were typically only specified for low-power applications where long life was the primary desired requirement. Without the mechanical brush-commutator mechanism that would wear and eventually result in motor failure, brushless motors could be relied upon to deliver performance over time. As for other advantages, conventional wisdom held that brushless motors provide high speed and fast acceleration, generate less audible noise and electromagnetic interference, and require low maintenance. Brush-commutated motors, on the other hand, would afford smooth operation and greater economy. In the past decade, though, brushless motors have gained broader appeal and greater acceptance in industry for a wider range of applications previously dominated by brush-commutated products, due in part to dramatic reductions in the cost and size of electronic components and advances in motor design and manufacturing.

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At the same time, manufacturers have further sought to challenge conventional wisdom by improving brushless motor design in an effort to combine the traditional advantages of brush-commutated and brushless types. A noteworthy example of how far these innovations have progressed involves the slotless (instead of slotted) construction of the brushless motor’s stationary member, or stator.

The slotless stator design originated with the goal to deliver smooth running performance and eliminate cogging, which is an unwanted characteristic especially in slower-running applications (less than 500 rpm). The absence of cogging is, in fact, the most-often cited reason for selecting a slotless brushless motor.

Slotted Motor Construction

Most brushless motors (slotted or slotless) use electronic commutation, usually Hall-effect sensors and magnets, in place of brushes. The motor’s rotor consists of a steel shaft with permanent magnets or a magnetic ring fixed around the circumference of the shaft. The magnets are responsible for producing torque. As the flux density of the magnet material increases, the amount of torque available from the rotor assembly increases.

In traditional slotted brushless motors, the stator features a group of slotted steel laminations (0.004 in. to 0.025 in. thick), which are fused to form a solid uniform stack and create a series of teeth. Wound copper coils, which produce electromagnetic fields, are then inserted into each of the slots. Together, the laminated stack and wound copper coil form the stator assembly. The return path completing the magnetic circuit consists of the laminated material outboard of the copper windings in the stator and the motor housing.

These brushless slotted motors are especially powerful, because the teeth around which the copper wire is wound place the iron closer to the magnets, so the magnetic circuit is completed more efficiently. As the air gap between iron and magnets is reduced, the torque available for the motor is increased.

However, slotted stators are known to cause cogging, which is attributed to the teeth in their construction. Cogging occurs when the permanent magnets on the rotor seek a preferred alignment with the slots of the stator. Winding copper wires through the slots tends to increase this effect. As magnets pass by the teeth, they have a greater attraction to the iron at the ends of the teeth than to the air gaps between them. This uneven magnetic pull causes the cogging, which ultimately contributes to torque ripple, efficiency loss, motor vibration, and noise, as well as preventing smooth motor operation at slow speeds. A slotless stator offered a solution to the problems experienced with cogging in slotted brushless DC motors.

Advantage of the BLDC Slotted Motor Technology

The main advantages of the slotted technology are:

  • ease of winding customization
  • increased heat dissipation
  • ability to withstand high peak torque
  • high power density

Slotted Motor Applications

The Slotted Motor is ideal for applications such as:

  • Medical Hand Tools
  • Hand held shaver system for arthroscopic surgeries
  • High speed surgical drills for ENT surgeries

Slotless Motor Construction

Instead of winding copper wires through slots in a laminated steel stack as in conventional slotted brushless motors, slotless motor wires are wound into a cylindrical shape and are encapsulated in a hightemperature epoxy resin to maintain their orientation with respect to the stator laminations and housing assembly. This configuration, which replaces the stator teeth, eliminates cogging altogether and results in desired quiet operation and smooth performance.

The slotless design also reduces damping losses related to eddy currents. These currents are weaker in a slotless motor, because the distance between the laminated iron and magnets is greater than in a slotted motor.

Slotless motors are typically designed with sinusoidal torque output that produces negligible distortion, rather then a trapezoidal voltage output. The sinusoidal output reduces torque ripple, especially when used with a sinusoidal driver. Because the slotless design has no stator teeth to interact with the permanent magnets, the motor does not generate detent torque. In addition, low magnetic saturation allows the motor to operate at several times its rated power for short intervals without perceptible torque roll-off at higher power levels.

Compared with slotted motors, slotless construction also can significantly reduce inductance to improve current bandwidth. The teeth in a slotted motor naturally cause more inductance: the coils of copper wire around the teeth interact with the iron in a slotted motor, and this interaction tends to send the current back on itself, resulting in more damping (or dragging) and impacting negatively on slotted motor response and acceleration.

In terms of delivering power, conventional slotted motors used to enjoy the advantage over slotless types, due (as noted) to the proximity of iron and magnets and the reduced air gap.

However, this advantage has virtually evaporated, in large part due to the utilization of high-energy, rare-earch magnets (such as samarium cobalt and neodymium iron boron). By incorporating these magnets, manufacturers of slotless brushless motors have been able to routinely compensate for the greater air-gap distance. These more powerful magnets effectively enable the same (or better) torque performance for slotless products compared with slotted. Eliminating the teeth and using stronger magnets both serve to maximize the strength of the electromagnetic field for optimum power output. Rare-earth magnets, along with the fact that fewer coils, or “turns,” of the wire are required in slotless motors, also help contribute to low electrical resistance, low winding inductance, low static friction, and high thermal efficiency in slotless motor types.

One more important difference between slotless and slotted designs is the rotor diameter. Slotless motors have a larger rotor diameter than slotted construction for the same outside motor diameter and will generate a higher inertia, as well as accommodating more magnet material for greater torque. For applications with high-inertia loads, the slotless product is more likely to be specified.

Slotless Motor Applications

In general, brushless motors are usually selected over brushcommutated motors for their extended motor life. (While motor life is application-specific, 10,000 hours are usually specified.) Other reasons for specifying brushless motors include a wide speed range, higher continuous torque capability, faster acceleration, and low maintenance.

In particular, slotless versions of brushless DC motors will suit those applications that require precise positioning and smooth operation. Typical niches for these motors include computer peripherals, mass storage systems, test and measurement equipment, and medical and clean-room equipment.

As examples, designers of medical equipment can utilize slotless motors for precise control in machines that meter and pump fluids into delicate areas, such as eyes. In medical imaging equipment, slotless brushless DC motors decrease banding by providing the smoother operation at low speeds. Airplane controls supply smoother feedback to pilots. And, by eliminating cogging and resulting vibration, these motors can reduce ergonomic problems associated with hand-held production tools. Other appropriate applications include scanners, robots for library data storage, laser beam reflector rotation and radar antenna rotation equipment, among many others./span)

Customization Options

Slotless brushless DC motors, as with most motors today, feature a modular design so they can be customized to meet specific performance requirements. As examples, planetary or spur gearheads can be integrated on motors for an application’s specific torque and cost requirements. Planetary gearheads offer a higher-torque alternative. Slotless motors can further be customized with optical encoders, which provide accurate position, velocity, and direction feedback that greatly enhances motor control and allows the motors to be utilized in a wider range of applications. As a low-cost alternative to optical encoders, rotor position indicators (ie. Hall Sensors) can be specified.

When using optical encoders, differential line drivers can be utilized to eliminate the effects of electrically noisy environments. Differential line drivers are designed to ensure uncorrupted position feedback from the encoder to the control circuit.

Motor Selection Guided by Application

Despite the overall design and performance comparisons reviewed here for slotless and slotted brushless DC motor types, one should remain cautious in drawing any conclusion that one type is the ultimate choice over the other. There are simply too many variables that must be evaluated, ranging from rotor size and windings to housing and special components. A given application and its requirements should (and will) be the guiding factors in selecting a particular motor type and the customized components to be incorporated.

Some encouraging news in those applications that would clearly benefit from a slotless brushless motor is that costs are coming down to be more in line with those for slotted motors. This is because of new streamlined manufacturing techniques and an increasingly available supply of powerful magnets, which are both beginning to have a positive impact on end-product costs.

Regardless of any cost differential, however, for many applications, slotless brushless DC motors will be the preferred choice to resolve specific requirement issues. While advances in electronics are beginning to be applied that promise to reduce normal cogging in slotted products as a step toward making these motors more smooth running and quiet, the industry is not there yet: slotless motors remain the best alternative where cogging and life are defining performance issues

This Tutorial and other Motion Control Tutorials are available through www.Servo2Go.com

For further information on this new product or others in our extensive product portfolio, call 1- 877-378-0240 or e-mail Warren Osak at warren@servo2go.comor visit Servo2Go.com at: www.Servo2Go.com

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Motion Control – High Performance Servo Gearbox is ideal for Cyclic or Continuous High Speed Applications!

Motion Control - Electromate offers GAM's Planetary Gearbox

 

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Motion Control Components – The SPH inline planetary gearbox available from Electromate is GAM’s latest solution for today’s demanding motion control challenges! 

Vaughan, Ontario, Canada — Motion Control Components — It is available in six frame sizes with nominal torque ratings from 15 to up to 900Nm. The SPH features precision cut helical gears that are ground for smoothness, quiet operation, and high accuracies. The face width of the SPH gears are up to 70% longer than the gears in comparable gearboxes on the market, which means more tooth contact and greater overall torque density. To carry the higher torques, SPH gears are case hardened which imparts strength deeper into the gear compared to nitriding which hardens just the surface. With several output configurations available, machine integration is simplified.

Motion Control - Electromate offers GAM's Planetary Gearbox

SPH Series Benefits

  • Helical Gearing
  • Lower backlashes
  • Lower noise levels
  • Smoother torque transmission.

CLICK HERE for additional information on the GAM SPG Gearbox

About Electromate:

Electromate’s Core Purpose is to help Manufacturers build better machines using differentiated automation technology. They specialize in Robotic and Mechatronic Solutions for the Industrial Automation marketplace. Respected by customers as a premiere source for High Performance Automation and Motion Control Components & Systems, Electromate® specializes in AC & DC Servo and Stepper Motors & Drives, Motion & Automation Controllers, Positioning Systems & Actuators, Feedback Devices, Gearing Products and HMI’s & Operator Displays, all supported via extensive product selection, just-in-timedelivery, dedicated customer service and technical engineering support.

More on Electromate can be found at

Website: http://www.electromate.com

LinkedIn: https://www.linkedin.com/company-beta/209277/

Twitter: https://twitter.com/Electromate

Facebook: https://www.facebook.com/electromateindustrial/

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Blog: https://electromate.wordpress.com/

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For more information on the “Best Place to Work”CLICK HERE!

To view Electromate’s new corporate video CLICK HERE

 

For further information on this new product or others in our extensive product portfolio, call 1-877-SERVO99 (737-8699) or e-mail Warren Osak at sales@electromate.com or visit Electromate at: www.electromate.com

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The Engineering Edge – High Speed Linear Motion – Sleeve Style Linear Bearings

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LM76 has two standard options for sleeve-style linear bearings when replacing linear ball bearings. Same format, dramatically different results.

About LM76 and “The Engineering Edge”

Founded in 1976, LM76 has been a leading designer/manufacturer of linear bearings, slides and linear motion systems. LM76 is renowned for its industry leading Minuteman PTFE Composite linear bearings. LM76 is a leading supplier of precision linear shafting: RC60, 300 Series Stainless Steel, and ceramic-coated aluminum shafting. LM76 also offers several FDA/USDA compliant linear bearings and slides for the food processing, pharmaceutical, medical, and packaging industries.

When others think catalog …   … LM76 thinks solution!

For additional information contact Mike Quinn at: LM76, 140 Industrial Dr., E. Longmeadow, MA 01028; Telephone: 413-525-4166, Fax: 413-525-3735 or E-Mail: mquinn@lm76.com or visit the website at http://www.lm76.com

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Motion Control Application- Vacuum Compatible Maxon Motors for Extreme Conditions!

Maxon Motor spent several months working alongside Instrument Design Technology (IDT) to customize a small, brushless motor to perform in the extreme vacuum conditions of the synchrotron. This article highlights the challenges in the design.

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Fall River, MA — Motion Control Components Application – The Diamond Light Source particle accelerator in Oxfordshire has been used for projects as diverse as analyzing the effects of strain on aircraft wings, studying the behavior of the HIV virus, and even reading ancient letters without opening them. The 45,000m2 synchrotron facility works by accelerating electrons to 3GeV, generating beams of synchrotron light, up to ten billion times brighter than the sun, in order to understand molecular structures. To prevent electrons being lost in collision with air molecules, the whole process is undertaken in a vacuum; around one billion times lower than atmospheric pressure. Clearly, creating scientific instrumentation for such conditions requires great specialist knowledge, and Widnes-based Instrument Design Technology (IDT) supplies the world’s leading synchrotron facilities.

Motion Control Application Maxon Motor for Synchrotron

Diamond specified that the Double Crystal Monochromator for its new X-Ray Spectroscopy Beamline B18 should drive the crucial Bragg rotational axis with a DC motor rather than the usual stepper motor. IDT managing director Paul Murray explains: “The goal was to achieve higher rotation speeds, with a lower motor temperature and smoother drivetrain than the stepper motor we had used previously. Stepper motors are inherently noisy, and often sources of vibration. Eliminating this issue would immediately improve results from the DCM – but the new motor would have to work flawlessly in a vacuum of 10-8 Torr.” To help solve the problem IDT enlisted the help of Paul Williams, senior sales engineer at maxon motor UK. With experienced engineers handling the project at every stage, and a long history of customizing high-performance motors for applications as demanding as space and surgical robotics, maxon’s teams in Britain and Switzerland were eager to rise to the challenge of creating a cutomized solution. Williams says: “Because the vacuum in the synchrotron must not be compromised, each individual aspect of the motor and its construction had to be analyzed for possible outgassing. The challenge for us was effectively to create a brushless motor with virtually no glues or plastics, an incredibly high temperature tolerance, and excellent performance.”

The starting point for the custom motor was maxon’s EC22 Heavy Duty Motor. Although originally developed for sub-sea oil applications, the 22mm brushless motor’s laser-welded stainless steel construction and broad temperature range already addressed many of the needs of high vacuum applications – and being a brushless DC motor meant it would immediately be more efficient, quiet and responsive than the previous stepper motor.

Maxon Motor for Application in Synchrotron

When customizing the EC22 HD for use in the synchrotron, maxon accounted for a number of factors. First among these was temperature management. Motors in a vacuum cannot dissipate heat through convection in the normal way, so can be prone to overheating. It is therefore important to choose a motor with high temperature tolerance, stay well within its rated performance in air, and, if possible, position other components in such a way as to spread heat by conduction. A high ratio gearbox was also vital. High vacuums of 10-7 Torr and greater can pull gaseous compounds from materials such as plastics and glues, compromising performance and contaminating the vacuum – a problem known as outgassing.

Each component in the motor was individually tested, and upgraded as necessary. For example, standard PVC cable coating was replaced with a more inert, Kapton version. It was therefore important that the EC22 HD was already substantially made from stainless steel, rather than plastics. Because of the potential for outgassing, the usual glues and epoxies could not be used, and the motor was put together using extensive micro laser welding. From its work with space and aerospace projects, maxon knew how standard, light greases used on motor bearings are affected in low pressure conditions. It was therefore important to specify an extremely inert lubricant which was also thick enough to avoid giving off vapor under high vacuum – and to account for the effect of this change on the motor’s operating characteristics and anticipated life cycle. To finally remove any remaining outgassing threat, motors for controlled vacuum conditions are baked at 120ºC for 24 hours. Already purpose-built for temperatures in excess of 200º C, the EC22 HD proved an ideal starting point.

The Double Crystal Monochromator, incorporating the special maxon DC motor, is now in active service in Diamond Light Source’s Beamline B18, playing its role in key experiments on a daily basis. As an example, a group of Italian scientists used Beamline B18 to study dust in snowflakes that fell some 800,000 years ago – about the time of the first hominid life on Earth. Ice cores drilled from the Antarctic are made up of layers of frozen snow, dating back hundreds of thousands of years… and minute dust particles trapped as the snow fell hold key information about the earth’s climate, atmosphere and volcanic activity at the time. Using X-Ray Absorption Spectroscopy, the scientists were able to study the mineral composition of the dust, determining its origin, and unlocking clues to the changes in global climate patterns over hundreds of millennia.

For infromation on the Maxom Motor EC22 HD CLICKHERE

Contact maxon for more details info@maxonmotorusa.com

Comprehensive documentation and software are included with every delivery, and are also available for you to download from our website at www.maxonmotor.com.

Motion Control – Frameless Brushless Servo Motor Kits from Maxon Are Available from Electromate!

Electromate offers Maxon Frameless DC Serov Motors from Maxon

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With outer diameters of only 43mm to 90 mm, these frameless brushless servo motors are extremely compact. 

 

Vaughan, Ontario, Canada — Motion Control Components — The new frameless motor kits from Maxon consist of only a rotor and stator – with no bearings or motor shaft. With outer diameters of only 43 to 90 mm, these pancake servo motor kits are extremely compact.

Available in size ranges from 30 Watt to 260 Watt, these EC (electronically commutated) frameless slotted motors feature low voltage windings, high pole pair count and are shipped as BLDC motor kits with the rotor and stator delivered separately without bearings and motor shaft.

The flat design, high torque output and hollow shaft construction provides plenty of space for cable glands which allows for a high level of integration into OEM applications such as Collaborative & Mobile Robots, AGV’s, Exoskeletons and Embedded Robotic Applications.

Performance data and additional information on the New Frameless Brushless Servo Motor Kits can be found at the link below.

CLICK HERE to view performance data and additional information on the New Frameless Brushless Servo Motor Kits.

About Electromate:

Electromate’s Core Purpose is to help Manufacturers build better machines using differentiated automation technology. They specialize in Robotic and Mechatronic Solutions for the Industrial Automation marketplace. Respected by customers as a premiere source for High Performance Automation and Motion Control Components & Systems, Electromate® specializes in AC & DC Servo and Stepper Motors & Drives, Motion & Automation Controllers, Positioning Systems & Actuators, Feedback Devices, Gearing Products and HMI’s & Operator Displays, all supported via extensive product selection, just-in-timedelivery, dedicated customer service and technical engineering support.

More on Electromate can be found at

Website: http://www.electromate.com

LinkedIn: https://www.linkedin.com/company-beta/209277/

Twitter: https://twitter.com/Electromate

Facebook: https://www.facebook.com/electromateindustrial/

Google+: https://plus.google.com/104057418684128701566

Blog: https://electromate.wordpress.com/

To view Electromate’s new corporate video CLICK HERE

For further information on this new product or others in our extensive product portfolio, call 1-877-SERVO99 (737-8699) or e-mail Warren Osak at sales@electromate.com or visit Electromate at: www.electromate.com

 

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Motion Control – The Engineering Edge – Trunnion Grinding Slide for Oil Field

 

We are shipping another slide today for the oil patch. When Weir Oil and Gas called with a slide application that required special engineering, LM76 was all ears – as it was right up our alley. This slide is a Trunnion Grinding Slide which has a 56HP motor running at 3500 RPM mounted to the Y Axis – with a 12″ grinding wheel attached. The X Axis (52″ Stroke) runs on 440C stainless linear ball bearings that have special beryllium copper scraper seal cartridges while the Y Axis (4″ Stroke) employs profile rail guides with double scraper seal kits. Our customer did not want protective bellows so we had to ensure grinding debris would not cause bearing or screw/nut failures. On both axis, we employed our proprietary “Polymatrix, Double Preloaded Nuts” as opposed to recirculating ball nuts. Why LM76? Good question…we were the only company that got back to them with a thoughtful solution.

About LM76 and “The Engineering Edge”

Founded in 1976, LM76 has been a leading designer/manufacturer of linear bearings, slides and linear motion systems. LM76 is renowned for its industry leading Minuteman PTFE Composite linear bearings. LM76 is a leading supplier of precision linear shafting: RC60, 300 Series Stainless Steel, and ceramic-coated aluminum shafting. LM76 also offers several FDA/USDA compliant linear bearings and slides for the food processing, pharmaceutical, medical, and packaging industries.

When others think catalog …   … LM76 thinks solution!

For additional information contact Mike Quinn at: LM76, 140 Industrial Dr., E. Longmeadow, MA 01028; Telephone: 413-525-4166, Fax: 413-525-3735 or E-Mail: mquinn@lm76.com or visit the website at http://www.lm76.com

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Motion Control – High Torque Rotary Voice Coil Actuators!

Linear Motion Control - H2W High Torque Voice Coil Actuators

 

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Santa Clarita, CA —– Linear Motion Control – H2W Technologies has developed several high torque rotary voice coil actuators, otherwise known as a limited angle torque motors or LATs. The model TWR-015-346-2RC was designed to allow for a low moving mass (68 grams per coil) and inertia, as well as dual independent coils to allow for two independent motion profiles or couple the coils together to double the torque output. This rotary voice coil actuator can generate a continuous torque of 185 in-oz [1.29 N-m] and a peak torque of 555 in-oz [3.88 N-m] at a duty cycle of 10% (i.e. 1 second on, and 9 seconds off) in each coil on a 4 inch [102 mm] rotation arm. By coupling the coils together, the continuous torque doubles to 370 in-oz [2.58 N-m] with a peak torque of 1110 in-oz [7.75 N-m] at a 10% duty cycle.

The TWR-015-346-2RC has a total angular displacement of 15 degrees [0.26 radians] and a motor constant of 34.4 in-oz/sqrt(watt) [0.24 N-m/sqrt(watt)] per coil or when coupled together the motor constant is 48.5 in-oz/sqrt(watt) [0.34 N-m/sqrt(watt)]. The voice coil motor requires 1.33 amps of continuous current per coil and 4.0 amps of peak current per coil to generate the specified forces. The actuator fits in and envelope of 4.37 in [111.1 mm] x 2.99 in [75.9 mm] x 1.64 in [41.5 mm].

The moving coil design ensures a hysteresis free movement as the coil is wet wound and self-supported, and the non-commutated coil allows for ripple-free motion and no cogging. The voice coil actuator has been designed with mounting provisions in the magnet and coil assemblies. This allows for the integration of a bearing system to maintain the clearances between the coil and permanent magnetic field assemblies. The rotary voice coil actuator is ideal for applications requiring high torque and high-speed applications. Examples of such applications are driving a gimbal axis in scanning applications as well as providing stabilizing torques for image stabilization. More examples of H2W’s Rotary Voice Coils are available on our website: https://www.h2wtech.com/category/rotary-voicecoil-actuators

Technology

Simply stated, a current carrying conductor placed in a magnetic field will have a force (or torque) exerted upon it. This force is proportional to the direction and magnitude of the current and the flux density field. Since the permanent magnet flux density field is fixed, the direction of the rotation depends on the polarity of input current and the amount of torque that is produced is directly proportional to the magnitude of the input current.

Linear Motion Control - H2W High Torque Voice Coil Actuators - Drawing

 

 

 

 

 

 

 

 

 

 

A DC linear servo amplifier is required to provide power to the torquer.

Rotary voice coil actuators are supplied unhoused without bearings.

Coupling the rotary voice coil actuator to your bearing system and a rotary encoder or other feedback device yields a system that is capable of intricate angular position, velocity, and acceleration control.

Low moving inertia of the moving coil assembly allows for high angular acceleration of the payload.

Advantages:

  • No Torque Ripple
  • High Angular Acceleration
  • No Commutation
  • Zero Cogging
  • Brushless
  • Low Profile

Applications:

  • Aerospace
  • Semiconductor
  • Medical
  • Military

Rotary Voice Coil Motor – is an arc segmented multipole permanent magnet stator with a low inertia copper magnet wire rotor. Angular excursions are typically less than 90º. This torquer is supplied with out a shaft or bearing.

TWR Series Limited Angle Torque Motor

The TWR Series is comprised of a stationary, arc segmented, multipole permanent magnet stator assembly with a low inertia wound wire rotor.

Rotor: The rotor is made up of a single coil of bondable copper magnet wire. The coil is wound and preformed into the desired shape. It is held together with the bonding agents in the wire. It can be encapsulated with aluminum or plastic brackets in order to provide a means for mounting the rotor to the bearing system and payload. The maximum angular excursion is less than 90º.

Stator: The stationary stator assembly consists of multipole permanent magnets that are bonded to steel plates. The 2 opposing steel plates are spaced apart to provide a gap using end plates. The coil rotor assembly moves angularly within this gap. There is no magnetic attractive force between the stator and the rotor.

The TWR Series Torquers are available in 2 configurations.

The low profile (Type L) configuration has a smaller overall height which allows it to fit in a more compact space, but has less angular rotation for a given stator arc segment.

The second configuration (Type S) has a larger overall height but has typically twice the angular rotation per given stator arc segment when compared to the Type L torquer.

  • No Torque Ripple
  • High Angular Acceleration
  • No Commutation
  • Brushless
  • Low Profile

For Product Descriptions of High Torque Voice Coil Actuators CLICK HERE

About H2W Technologies, Inc.

H2W Technologies, Inc. is dedicated to the design and manufacture of linear and rotary motion products that are used in the motion control industry. The complete line of linear electric motors includes: Single and dual axis linear steppers, DC brush and brushless linear motors, voice coil actuators, and AC induction motors. Also offered is a complete line of ball screw, lead screw and belt driven positioning stages.

Other motion control products include: Limited angle torque motors for compact, limited angular excursion rotary servo applications, 3 phase brushless rotary servo motors with matching digital servo amplifiers and permanent magnet linear brakes for fail-safe, zero power braking for baggage handling and people moving applications as well as amusement park rides.

With over 75 years combined experience in the linear and rotary motion field, the H2W Technologies team of engineers offers the optimal solution to the most demanding motion control, requirements.

For additional information contact Mark Wilson at H2W Technologies, 26380 Ferry Ct, Santa Clarita, CA 91350; Tel: 888-702-0540, Fax: 661-251-2067, E-Mail: info@h2wtech.com or visit the website at http://www.h2wtech.com

 

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Motion Control – Maxon’s New EPOS Programmable Smart Drive/Controller – “Positioning Made Easy” are Available from Electromate!

Motion Control EPOS Controllers

 

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Vaughan, Ontario, Canada — Motion Control Components — EPOS is a modular, digital positioning controller by maxon motor. It is suitable for controlling permanent magnet-activated motors with encoders in a range of 1 to 1050 W continuous output power. The wide range of operating modes, as well as various command interfaces, make it versatile for use in many different drive systems in the fields of automation technology and mechatronics

With the EPOS4 Compact 50/8 EtherCAT and EPOS4 Compact 50/15 EtherCAT, maxon launches the first compact devices compatible with the fast industrial Ethernet connection EtherCAT. The fully integrated, plug-and-play positioning controller in a compact design is perfectly suited for use in networks with cycle times up to 1 ms.

Powerhouse with excellent control characteristics

The functionality, operation, software, and accessories of the new controllers are derived directly from existing products in the EPOS4 range. The devices are suitable for use with both brushed DC and brushless EC motors (BLDC) and come with comprehensive feedback options such as Hall sensors, as well as incremental and SSI absolute encoders. State-of-the art concepts such as FOC, feed forward, and observer control allow optimal control in a wide variety of applications.

Comprehensive functional scope and easy operation

The existing digital and analog inputs and outputs are freely configurable and ideally matched to the numerous functions and operating modes of CiA-402 positioning controllers. Products are set up using the EPOS Studio graphical user interface (Version 3.4 and higher) for Windows PCs. In addition to the intuitive commissioning software, Windows DLL and Linux Shared Objects libraries are freely available to make integration into a wide variety of master systems as easy as possible.

Motion Control - Maxon EPOS Controllers
Electromate offers Maxon EPOS Controllers

About Electromate:

Electromate’s Core Purpose is to help Manufacturers build better machines using differentiated automation technology. They specialize in Robotic and Mechatronic Solutions for the Industrial Automation marketplace. Respected by customers as a premiere source for High Performance Automation and Motion Control Components & Systems, Electromate® specializes in AC & DC Servo and Stepper Motors & Drives, Motion & Automation Controllers, Positioning Systems & Actuators, Feedback Devices, Gearing Products and HMI’s & Operator Displays, all supported via extensive product selection, just-in-timedelivery, dedicated customer service and technical engineering support.

More on Electromate can be found at

Website: http://www.electromate.com

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Facebook: https://www.facebook.com/electromateindustrial/

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Blog: https://electromate.wordpress.com/

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For further information on this new product or others in our extensive product portfolio, call 1-877-SERVO99 (737-8699) or e-mail Warren Osak at sales@electromate.com or visit Electromate at: www.electromate.com

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