Category Archives: Application Note

Motion Control – Case Study: Precision Ground Ball Screw Drives Universal Pipetting Module!

Motion Control Case Study – Pipetting

COVID-19 Testing / Sampling Applications

motion control - Pipetting Module


montion control - productsReaching New Levels of Speed, Lifetime, and Force Sensitivity

Woburn, MA –Motion Control Components Ball Screws – Case Study –

Situation:

In the area of automated laboratory equipment, servo-controlled pipetting modules are a key component of high-throughput systems. A major, global OEM had been using an off-the-shelf linear actuator to drive the pipette. This actuator had a limited range of capability in terms of speed, positioning accuracy, and force sensitivity. Although it met the minimum technical requirements and was cost-effective, engineers soon were asked to push performance to the next level.

 

Challenge:

The company decided to develop a next-generation system. Throughput was essential, as it wanted to target the largest hospitals and laboratories handling tens of thousands of samples annually. The pipetting module also needed to have enhanced flexibility to support a greater variety of operations. It should allow for a wider range of speeds and be highly accurate in both positioning and bottom-finding. Engineers were also tasked with achieving a 10-year lifetime with little or no maintenance. This high lifetime was critical because their business model included free field service. To meet these new requirements, the actuator would have to be redesigned. In particular, the bearing configuration did not support the required accuracy and sensitivity. The supplier was unwilling to modify its design. Company engineers realized that they would have to design a custom actuator.

motion control steinmeyer ball screw

Resolution:

They came to Steinmeyer for a precision ground ball screw. They knew that Steinmeyer had world-class quality and a very wide selection of miniature screw sizes. For this project, they were able to consider shaft diameters of 5mm or 6mm, with pitch down to 0.5mm! They selected a 6mm screw to meet the challenge. Company engineers conducted extensive performance testing on the first prototype quantities. They put the new module through an exhaustive regimen of motion, and measured positioning, force sensitivity, friction torque, motor current, and other parameters. They verified that their module design met all of the new performance requirements. The company has since achieved FDA approval for the new system and formally launched commercial sales.

Future Plans:

Noise minimization is important for laboratory equipment. The next generation pipetting module will look to ensure the quietest possible operation. The OEM will be evaluating our proprietary super-finishing process called optiSLITE. This technology removes the largest irregularities left over from thread grinding of the shaft. The resulting surface yields a noticeably smoother and quieter operation.

motion control ball screw surface finish

To Download a PDF of this Case Study Go To – https://ballscrew-tech.com/2019/05/17/case-study-pipetting-module-driven-by-ground-ball-screw/

motion control application - pipetting

About Steinmeyer

Steinmeyer is the world’s longest continuously-operating manufacturer of commercial ball screws. In the realm of linear motion control, our company has become synonymous with precision, innovation, and exacting standards of quality.

Steinmeyer’s extensive product line is used widely in drive systems for industrial machines as well as precision positioning in optical instruments, medical devices, and other mechatronic applications.

 

Contact Steinmeyer for further information on their extensive product portfolio:

781-273-6220

infoUSA@steinmeyer.com

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Steinmeyer Ball Screw Resource Center

 

Other Interesting Case Studies from Steinmeyer:

For the Case Study “Custom Linear Modules for Lithography Masking” CLICK HERE

For the Case Study “Wearable Pumps” CLICK HERE


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Motion Control Application – Driver assist systems can help save lives by alerting driver of potential danger!

Motion Control – Application – Driver Assist Systems Help Save Lives!

 

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motion control - application - brushed motors

Maxon A-max 16 brushed DC motor – This drive with a diameter of 16 millimeters (precious metal brushes, 2 Watt) was developed for use with an eccentric weight and a specified bearing.

Fall River, MA — The majority of traffic accidents are caused by human error. In the future, computer-controlled cars will significantly reduce the number of such accidents. Driver assist systems, such as adaptive cruise control (ACC), brake assist systems, or lane departure warning systems (LDW), can save lives. Lane departure warning systems warn the driver if the vehicle is drifting out of its lane. The LDW determines the vehicle’s position in the lane with the use of various optical sensor systems and computers. If the car is in danger of drifting out of the lane, the system activates an electric motor in the steering wheel that causes the wheel to vibrate, warning the driver.

A luxury car manufacturer has engaged maxon to supply the motors for this application. The base DC brushed motor is maxon’s A-max 16 (precious metal brushes, 2 W), modified for the application with an eccentric weight and a specified bearing. In order to prevent the other vehicle systems from being affected by the electromagnetic fields of the motor, it has been equipped with special EMI suppression for automotive applications. The small drive system must meet specific requirements: It needs to be low-noise, dynamic, feature high power density, and fit in a narrow space – requirements that maxon’s small A-max 16 easily masters..

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.

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Motion Control Application – Twenty-twenty Vision – Maxon Components Allow Surgeon to Not only See But to Feel!

Motion Control Application –

While robotic assistance systems are available for most types of surgery today, eye surgery used to be an exception. A Dutch company has changed that. A world first in eye surgery.

 

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motion control component used in eye surgery

© 2016 Preceyes

Fall River, MA — Motion Control Components Application – Worldwide, about 50 to 70 million people are suffering from visual impairment due to disorders of the retina. Adequate treatment is still impossible in many cases. Eye operations are always a big challenge for a surgeon, and steady hands are a key requirement. Surgeries like those for treating a detached retina require extreme precision. And when it comes to precision, human hands can’t hold a candle to robotic systems.

Ten to twenty times better precision

This is why the company Preceyes, which originated as a spin-out from the University of Eindhoven (Netherlands), has developed a completely new robotic system for eye surgery. Specially designed for the treatment of retina disorders, the assistance system improves precision by a factor of 10 to 20 compared with the human hand. This allows operations to be performed that are currently impossible due to lack of precision – an enormous gain for patients, but also for surgeons, whose effectiveness and accuracy will be vastly improved

motion control haptic robotic component

The new robotic system is used in surgery to treat disorders of the retina. Image © Preceyes

The world’s first robot-assisted operation inside the eye was performed successfully at the John Radcliffe Hospital, Oxford. “This is the culmination of 10 years of work. The ease with which Professor MacLaren was able to perform the surgery is an important step ahead for robot-assisted eye operations and a clear vindication of our technology,” says Marc de Smet, MD Chief Medical Officer at Preceyes.

Haptic feedback

The functional principle is straightforward: While the operating surgeon is sitting next to the patient’s head looking through a microscope, he is operating a joystick whose motion is transmitted to a robotic arm (slave). The robot downscales the motion: When the surgeon moves the joystick by a centimeter, the tip of the robotic arm moves only by a millimeter. Meanwhile, the other hand performs manual tasks as required. The system is designed to allow surgeries to be performed with motion control alone as well, using two joysticks and two robotic arms..

In addition to a haptic feedback function that not only lets the surgeon see but also feel his actions, the robotic system also supports quick retooling. This is an important factor because it reduces the time required for an operation. The motions of the robotic arms are performed by high-precision drive systems of maxon.

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.

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For other Motion Control Components, Applications, and Technology from Maxon Motor go to: http://AllmotionBlogger.com
 

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Motion Control Application – Maxon Drives Power – Hull Cleaning Robot for Large Ships!

Motion Control Application – Specially designed robotic crawler navigates around the underwater portion of a ship to remove the biofilm layers that accumulate there. As a battery operated, autonomous vehicle, component selection made up a highly critical part of the design and manufacture.

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The HullBUG provides grooming of the biofilm that collects on the
underwater portion of ships. © 2011 SeaRobotics

Fall River, MA — Motion Control Components Application – Toxic paint is used on the bottoms of large ships to prevent fouling, which is when a biofilm layer develops, decreasing the ship’s efficiency in moving through the water. The toxic paint continually leeches copper and other heavy metals into the underwater environment as well, causing damage to the organisms that live there. To further complicate the matter, the paint must be blasted off and replaced every 5 to 10 years, at which time literally tons of toxic waste is produced and needs to be disposed of. A ship that operates with a clean underwater surface free from fouling—even thin biofilm layers—will operate so much more efficiently that potential savings can easily reach over five percent in fuel costs alone. Without the concern for fouling, a ship’s underwater coating can be engineered for corrosion protection and longevity rather than its need to eliminate the potential for biofouling. If realized on all the ships operating in the world today the energy savings would greatly reduce the presence of greenhouse gases, as well.

To eliminate the requirement for toxic paint and its cleaning waste, there needed to be a method to “groom” the biofilm from the underwater portion of a ship. The idea was to create important changes for the ships being built as well as for the environment. That is where the HullBUG (Hull Bioinspired Underwater Grooming) concept originated. “The most important feature of the HullBUG is its small size,” according to SeaRobotics Research Engineer, Dr. Kenneth Holappa. “It is only about half a meter in length. This was a necessary design feature, needed to allow the vehicle to maneuver over the curved surface of the hull while continually maintaining close contact with the surface.

This close-up of the HullBUG clearly shows its sensor alignment
system that helps it keep on course while cleaning a hull.

© 2011 SeaRobotics

Because there are hazards associated with operating such a device underwater and in a harbor environment occasionally a HullBUG might be lost or destroyed during operation. Keeping the size and cost of the system low definitely helped to eliminate damage as a major obstacle to implementation. So, from the very beginning of the project, small size and low cost have been identified as being critical to the satisfactory implementation of the HullBUG project. As can be expected, this need to maintain a particular size and weight filtered into the selection of every component of the design.

Motion Control Components

The selection of the motors to drive the HullBUG involved a number of critical engineering constraints and compromises. SeaRobotics decided to make two basic models, one with wheels and one with tracks, and offer several options for keeping track of the system’s progress, which will be discussed later. Sizing of the motors, for example, required a calculated estimate of the power, speed, and torque characteristics of the manufactured devices. Determining factors included the resistance caused from pushing the grooming tool across the surface of the ship, the hydrodynamic resistance of the vehicle itself as it moved through the water, friction losses in the shaft seals that were used to protect the motors from the saltwater, and track or wheel friction dependent on which version of the unit was used.

In this close-up you can see the max-on EC45 brushless motor and
interface boards about to be safely mounted inside the machine.
© 2011 SeaRobotics

maxon motors offers a full line of fractional horsepower moving coil DC motors and brushless motors ranging in size from 6mm to 90mm, and from 30 mW to 500 watts. They also offer gearheads, controllers, and accessories. “The breadth of their product line and quality of their service helped us to feel comfortable that we had selected the right partner,” Ken said. Flat motors manufactured by maxon Precision Motor provide long life along with their low profile package. The entire EC series of brushless motors are electronically commutated, which enables them to have extremely long motor life since there are no mechanical brushes to wear out. The motors incorporate ball bearings or ruby bearings that also add to the longevity of the motors, especially needed in such harsh conditions. The flat motors were designed specifically for robotics applications where size and weight are important selection criteria. The EC45 flat motors selected for the HullBUG are very efficient and weigh only 75 grams. Continuous output power is 30 watts, while the maximum speed is 10,000 rpm (much faster than what was needed for this application). The important specification for this application was torque. Even under the potentially harsh environments that the HullBUG would be engaged in, the EC45 offered a maximum continuous torque up to 56.2 mNm depending on the winding chosen by the user. The Maxon brushless motors are built to IP54 standards, which was important to the application. Furthermore, the motors were also available in the system voltage that SeaRobotics required for the HullBUG application.

According to Ken, “The large load capacity of the shafts of the GP42 gearhead allowed the wheels to directly mount to the gearhead shaft, greatly reducing the complexity of the overall design of the system.” Gearheads manufactured by maxon are available in a wide range of ratios to enhance speed reduction and/or torque multiplication dependent on the needs of the user’s application. Concentric input and output helped to facilitate simpler and more direct mounting arrangements, as well.

Given that the HullBUG vehicle was to be completely autonomous, it had to be designed in such a way as to operate for many hours on batteries (cables would simply get in the way of the grooming operation). In order to maximize battery life, the grooming of the biofilm had to be performed in the most efficient manner possible. Navigating in a random pattern may eventually get the job done, for instance, but not in a reasonable amount of time. Plus, a typical ship presents a very large underwater surface, often as upwards of three thousand square meters. To keep this amount of area groomed it is expected that a user would employ multiple HullBUG vehicles to operate at the same time and, consequently, require a method of acquiring sophisticated coordinated navigation.

Navigating the HallBUG

A toolset of navigation modes has been created to allow multiple HullBUGs to efficiently groom a ship by dividing the ship’s underwater surface into regions. Numerous algorithms have been incorporated to accurately groom the ship in steps down to the turn of the bilge. Additional algorithms and associated sensors are used to allow efficient grooming of the flat bottom of the ship. Miniature acoustic ranging sonar (MARS) is also an option for navigation control of the HullBUG. This is where a very small close range, pencil beam sonar was specifically developed to allow the vehicle to “see” an upcoming wall or cliff condition such as bilge keels and bow thrusters. Yet another mode of navigation uses a MEMS rate sensor for navigation information. Another feedback mode uses encoder based odometry. Hall sensor feedback from the motor is used as an encoder signal to establish an accurate estimate of odometry. Hall sensors were used instead of optical encoders because of size and cost. The Hall sensors provide better than 1mm accuracy in the measurement of odometry with the motor/gearhead combination chosen.

Ongoing Software Development

An autonomous vehicle is often software heavy in terms of engineering efforts once you’ve selected and implemented the proper motion control system. Getting smooth reliable navigation maneuvers that result in accurate positioning in a widely varying environment was one of the more difficult challenges for the design team. Multiple layers of software were necessary for handling the number and variety of possible events that can occur during grooming. And, the proper organization of the control logic to allow extensibility of navigation behavior was the most difficult part of this complex system. “Software development will continue to be an ongoing effort even after the years already put into it,” Ken said. “Though the vehicle is completely operational, there remains a considerable amount of on-ship testing to be done.” As the project moves forward and into the field, there will no doubt be additional issues that will crop up and need to be addressed, as well. Even now, the vehicle must be able to reliably accomplish its task in a hostile environment and in an unmapped terrain. Then it has to be able to return to the waterline of the ship for retrieval.

This operation must be done repeatedly for days, months, and years, and with multiple systems in the water at the same time. Although this sounds as though it is overly difficult, according to Ken, “A technician was recently trained to use the vehicle and was fully competent within a short period of time. The user interface was borrowed from SeaRobotics’ Unmanned Surface Vehicle (USV) product line and presented an intuitive graphics-driven interface that has hundreds of hours of use by many different customers.” The vehicle is operational and the navigation software is working. The next primary focus will be the structuring of the interface to improve ease of use and allow non-engineering personnel to manage operations.

maxon manufactures a wide variety of EC flat motors for different
kinds of applications. © 2011 maxon motor

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.

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For other Motion Control Components, Applications, and Technology from Maxon Motor go to: http://Automation-Blogger.com
 

Motion Control Application – Implantable medication delivery systems: Where every microliter counts!

Motion Control Application – Implantable medication delivery systems can have a decisive influence on the quality of life of the patients. In many cases, such delivery systems are vital for the survival of the patients – the systems have to be absolutely reliable. maxon motor manufactures high-precision micro drives for medication delivery systems.

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motion control application - implantable pump Fall River, MA — Motion Control Components Application – Patients that suffer from chronic pain, metabolic disorders, diseases of the central nervous system and tumor diseases require accurately dosed medication. Here implantable medication delivery systems are used. Through the localized medication delivery, the dosage can be reduced to the required minimum. These infusion systems thus improve the quality of life of the patients. For many patients, it is only the medication delivery system that allows them to have a life outside of the clinic. Repetitive invasive, painful operations can be avoided. The risk of medication dependency and undesired side effects are reduced to a minimum. All these factors can contribute to the disease no longer being the central focus of the patient’s life. For example, an active implant is implanted in the lower abdomen directly underneath the skin, where it delivers the medication dosage, programmed by the physician, to the body at the defined times of the day. The implantable unit has a wireless data interface to a patient interface by which the dosage can be adapted at any time. At regular intervals, the internal medication reservoir can be refilled by a specialist. The life span of the active implants measures many years and is limited only by the life of the battery. The core of the active implant is a piston pump manufactured by maxon medical, which specializes in medical technology and is a division of the maxon motor Group. However, the micro drives for implantable medication delivery systems are not comparable with customary maxon motors. In a customary motor, rotary motion is generated and yields torque and speed of rotation. maxon miniature piston pump The reciprocating piston pump generates a linear movement that results in liquid pumping. The individual parts of the pump have very narrow tolerances and allow the pump volume to be adjusted with a precision of less a microliter per piston stroke. As active implants are in direct contact with human tissue, biocompatible materials are an absolute requirement. Therefore, in most cases, titanium is used for the implants. Machining of titanium, especially safe and reliable laser welding, requires a very high level of expertise. Special testing and quality methods, such as inspecting the penetration depth, microhardness and density of the weld seams, are established procedures at maxon medical. The customer requirements on the product are thus fulfilled and the reliability and constant quality of the manufacturing processes are guaranteed. The entire assembly of the implantable micro drive takes place under cleanroom conditions. maxon medical – Specialist for medical drive solutions and active implants maxon medical specializes in the manufacturing of medical drive solutions for active implants. The division received ISO 13485 certification in December 2008. The quality management system and the project organization ensure safe, reliable and standard-compliant products and provide the customer with a sound basis for statutory approval of the final products. Professional project organization and a proven risk management system allow efficient implementation of customer projects. Strict maintenance of statutory requirements has top priority in the implementation of medical technology projects with risk class IIb + III. Production processes, production systems and testing systems always fall under GMP (Good Manufacturing Practice, Commission Directive 2003/94/EC), regardless of the classification of the product. maxon medical meets highest customer requirements – from selection of suitable suppliers to multi-tier quality control, from the individual parts to the final product. Manufacturing processes in the field of medical technology have very high documentation requirements during the entire value-added chain. All the way from the project idea to series production. In the end, a comprehensive and detailed documentation of all processes is required, including verification of process capability and traceability right back to the individual parts. This process control, matured to the last detail, characterizes maxon medical. It is an important and indispensable component of the entire production process and guarantees the high quality of the micro drives used for active implants of maxon medical. 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.

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Motion Control – Case Study: Wearable Pumps Driven by Ball Screws!

Motion Control – Ball Screws are Enabling the Next Generation of Cardiovascular Assist Devices motion control application   motion control - Steinmeyer application

Woburn, MA –Motion Control Components Ball Screws – Case Study – In this Case Study you will learn how a novel, ball screw driven pump made life-changing, ambulatory therapy possible for cardiovascular patients. Read how mechanical engineers utilized smooth running and quiet miniature ball screws from Steinmeyer to satisfy the demanding requirements of this medical advancement. The challenges included:.

  • Precise control of pressure
  • Light weight and compact
  • Quiet

CLICK HERE To Download CASE STUDY About Steinmeyer Steinmeyer is the world’s longest continuously-operating manufacturer of commercial ball screws. In the realm of linear motion control, our company has become synonymous with precision, innovation, and exacting standards of quality. Steinmeyer’s extensive product line is used widely in drive systems for industrial machines as well as precision positioning in optical instruments, medical devices, and other mechatronic applications. www.steinmeyer.com For further information on Steinmeyer’s extensive product portfolio, call 1-781-273-6220 or e-mail Bruce Gretz at bruce.gretz@steinmeyer.com or visit Steinmeyer at: www.steinmeyer.com

For other Motion Control Components, Applications, and Technology from Steinmeyer visit the ORIGINAL: http://MotionControlBuyersGuide.com

 
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Motion Control Application- Maxon Is A Part of NASA’s InSight Mission!

Swiss motor ventures deep under the surface of Mars.

 

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Fall River, MA — Motion Control Components Application – The InSight probe landed on Mars to shed new light on the formation of rocky planets. The mission entails driving a measuring probe five meters deep into the Martian ground. maxon engineers pulled out all the stops to make their motor fit for the job.

Tension was mounting among fans of space exploration, as the robotic InSight probe landed on Mars on November 26. If all goes according to plan, the stationary lander will proceed to carry out various measurements over a period of two years and provide important insights into Mars and the formation of Earth. The mission is being conducted by the Jet Propulsion Laboratory (JPL) for NASA.

 

Motor rams penetrometer 5 meters deep into the ground

DC motors from the Obwalden-based drive specialist maxon motor are also on board. A compact motor-gearhead combination with a diameter of 22 millimeters is used in the HP3 probe developed by the German Aerospace Center (DLR). It is designed to determine the temperature profile of the planet. Specifically, the maxon drive is located in a rod-shaped penetrometer, nicknamed “the Mole” by the developers. This penetrometer is autonomously driven five meters into the ground. To achieve this, the motor tensions a spring with each revolution. The spring then releases with great force, executing a powerful downward punch. In this way, the “Mole” gradually burrows downwards – over a period of several weeks, pulling along a cable that is equipped with sensors to help the researchers determine the thermal state of the interior of Mars and draw conclusions about its origin. Since Mars is a rocky planet like Earth, the scientific results may also help gain a better understanding of our own planet.

Special solution for more than 400 g

Mars is not a very friendly environment for technology. Nonetheless, more than a hundred maxon drives have already proven their worth on the Red Planet. The current InSight mission, however, posed additional challenges for the Swiss engineers. To efficiently drive the penetrometer into the ground, the DC motor needs to withstand forces in excess of 400 g – and more than 100,000 times. It took a number of variations and failed tests to find the right solution. The result is a standard DCX 22 motor, greatly modified with additional welding rings, bearing welds and specially shortened brushes. The utilized GP 22 HD gearhead, on the other hand, only needed Mars-specific lubrication.

Say hello to an old acquaintance

The InSight probe is powered by two solar panels for the duration of its mission. To save costs, JPL repurposed designs from the successful Phoenix mission, using a maxon DC motor developed some time ago to extend the solar panels. This type of motor, an RE 25, has ensured that NASA’s Opportunity rover has been active on Mars for more than 14 years (even if it is currently in deep sleep due to a sandstorm). Thus, two generations of maxon drives come together in the InSight robot probe to jointly contribute to the mission’s success.

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.

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The Engineering Edge – Application – Whisper Slides for Harvesting Honey

Engineering Edge - Honey Application

Sometimes, an application leads you to an immediate, off-the-shelf solution – like this one. Harvesting bee honey is a seasonal opportunity and these systems are hauled across the country to make it happen. They need to be all weather, tough and maintenance-free. The next time you take some honey and put it in your tea, think of us – LM76.

 

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

engineering edge directory link

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Motion Control Application – Please smile with maxon motors!

Motion Control Application – Digital SLR cameras can deliver extremely sharp photos – regardless of whether the photographer is a professional or a hobbyist. Not only does the skill of the photographer, but also the technology inside the camera play a key role. maxon drive systems help to create lightning-fast images.

motion control - leica lens with motor

 

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Fall River, MA — Motion Control Components Application – A maxon A-max 12 with precious metal brushes is installed in the central shutter of the S lens. The maxon A max program stands for high-quality DC motors with an optimal price/performance ratio.

With its Leica S system, camera manufacturer Leica offers a unique combination of performance features for digital photography. It combines the image quality of a medium-format camera with the handling, speed and flexibility of a small-format camera. The lenses used in the Leica S system have a built-in dedicated processor for controlling the auto focus. The lenses are also available with a central shutter for maximum flexibility when using a flash. Besides the focal-plane shutter, which is integrated in the camera, the central shutter is one of two common designs. The central shutter is typically located at a “central” position in the lens assembly, between the optical lens elements. It consists of several blades arranged around the optical axis in a concentric pattern. When the shutter release of the camera is pressed, the blades snap back from this axis synchronously and let the light fall on the sensor.

With SLR cameras, the central shutter first closes after the shutter release, because all the settings were made with an open shutter. The mirror swings up, then the central shutter opens for the duration of the exposure before closing again. Finally, the mirror swings back into the path of light, and the shutter opens. Even though it employs the classic solution of mechanical springs for the efficient storage of potential energy, the central shutter is a piece of cutting-edge technology. The tensioned-spring principle contributes significantly to the extremely compact dimensions.

Small motor for high tension

The springs are tensioned by a specially developed maxon motor with a high-precision overrunning clutch and release their stored energy to activate the shutter blades when the shutter release is depressed. A specially constructed solution prevents the blades from rebounding when the shutter is opened or closed. A microprocessor-controlled pawl and ratchet mechanism controls the shutter cycle via two electromagnetically activated plungers.

The gear motor of maxon motor is used for tensioning three springs that store the energy for the central shutter. A maxon A-max 12 motor is used as the base motor. The gearhead is an all-new development and is adapted to the available space. This presented a special challenge to the gear motor in the central shutter of the Leica lens. What was needed and developed was a very compact, enclosed and sealed custom version of the gearhead with perpendicular power transmission to toothed gear of the central shutter through a crown gear, for a life span of more than 100.000 releases.

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.

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Motion Control Application – Maxon Motor’s Exoskeleton Joint Actuator!

Motion Control – Application – Reliable, Powerful, Efficient

 motion control - Application - Exoskeleton Drive

 

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Fall River, MA — Motion Control Components Application – Maxon Motor developed an exoskeleton drive for use in robotic limbs. This complete joint actuation unit consists of a pancake brushless DC motor with inertia optimized rotor. Also included is an internal high resolution encoder, planetary gearhead with absolute encoder and a position controller with CAN and RS232 interface. Fitting absolute encoder directly at the joint rotation provides designers increased positioning accuracy.

The unit delivers 54Nm of continuous torque and 120Nm on a 20% duty cycle and may be operated on supplies between 10 and 50V DC and the actuation speed is up to 22rpm. Other key features include: compact housing, integrated controller and reduced weight and cost. The ideal choice for use in Hip and Knee Exoskeletons.

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.

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