Custom DC motor for maximum power density

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New brushed DC motor design from maxon motor.

maxon motor Australia have configured a combination of brushed DC motor, planetary gearhead and digital incremental encoder with completely customised features for a prominent medical manufacturer and have produced it in 11 working days.

An interactive 3D model of the entire assembled combination showing all modifications and final production part numbers can now be generated within an hour of specification request along with data sheets showing the working points of the application. The new process eliminates large amounts of traditional internal procedures, with the robotic production line and parts procurement all linked together with the new design tool. The new motor pictured below shows a unique stepped planetary gearhead that uses a 26mm diameter on the high speed input stage and a 32mm on the high torque output stage. Focusing the wear and strength attributes by placing components specific to their role also increases the motors power density. In order to allow for the full use of shaft length that is tailored for the application, a new process of laser welding the inner race of the output bearing directly to the shaft material has been used over the traditional methods of c-clips and shaft collars. This is also naturally stronger than glue and press fit methods. The motor is capable of producing over 10,000rpm and the gearhead up to 12Nm with ratios to 1526:1. Zero cogging and linear characteristics combined with new encoder resolutions up to a staggering 65,536cpt open new position control possibilities for automation, tool and robotics applications.

Contact maxon motor Australia for assistance. Ph: +61 2 9457 7477.

World First: robotic system for eye surgeries

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Dutch company Preceyes developed a world first robotic system for retina disorders, using haptic feedback and maxon DC motors.

Detached retina surgery requires precision to an nth degree where the stability of human hands are no match compared to robotic systems. This is why Dutch company, Preceyes, developed a completely new robotic system for eye surgery. Especially designed for the treatment of retina disorders, the robotic device improves precision up to 20 times more than a Surgeons hand, making operations once deemed impossible due to lack of precision now being successfully performed.

Surgeons operate via a joystick while looking through a microscope. The joystick controls a robotic arm, controlled by maxon DC motors, assisting surgery in millimeter increments. A haptic feedback function allows the surgeon to see and feel their actions and the robotic system supports quick retooling. This is an important factor because it reduces operation time bringing a multitude of benefits to the patient.

For more information on DC motors and drive systems in robotic medical applications, please contact maxon motor Australia tel. +61 2 9457 7477.

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

 

 

A new laser navigation system for image guided medical procedures

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Maxon brushless DC motors, gearheads and encoders are at work in a laser system for CT-guided procedures.

Doctors rely upon high-resolution CT images, for example, to guide biopsies, make diagnoses or for pain relief therapies. After identifying an area for biopsy, surgeons ascertain how to reach the area, where to place the needle tip, what angle to follow and how to minimise damage to healthy tissue. To combat these issues with pin-point technology, a German company designed an automated laser-guided system consisting of a ceiling mounted arc-shaped rail on which a motorised laser positioning unit is affixed. The laser guides the entry point, depth and angle for a needle that is 0.7mm thin.

A brushless maxon DC motor combination, selected for the small size and reliability of operation, meticulously drives the unit on the arc’s rail, which holds the rotary laser. The brushless flat EC motor with a diameter of 45mm is fitted with a planetary gearhead and MR Encoder. Two more brushless maxon DC motors control the rotation of the laser mirrors, the EC-max 16 fitted with a GP 16A planetary gearhead and MR encoder. These brushless DC motors allow for exact positioning of the laser beam and are controlled using three EPOS2 Modules.

For more information on medical application technology speak to a maxon motor Engineer on Tel. +61 2 9457 7477.

 

Maxon release two new DC motors and EPOS controllers.

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Two new configurable DC motors and complementary compact EPOS4 positioning controllers have been released from maxon motor Australia.

maxon motor have added two new miniature 16mm brushless DC motors to their ECX range – the ECX SPEED 16 and ECX SPEED 16 High Power. The standard version, ECX SPEED 16 is a lower-cost option with no compromise on the quality and efficiency of the DC motor. The high speed DC motor is sterilisable and enhanced for applications requiring low heat build-up and low vibrations. These brushless DC motors present more torque and even better efficiency than the current offerings. Configurable online, manufactured in 11 days and with detailed 3D product data available, start designing your DC motor combination at shop.maxonmotor.com.au

In addition to the recently released EPOS4 positioning controller, maxon motor have added two new compact, price-competitive controllers. Paying only for what the customer needs, the new EPOS4 is powerful, small and easy to use with maxon’s automatic controller tuning software. In addition to this maxon offers free literature, application examples, support and documentation at epos.maxonmotor.com.au

For more information on the new brushless DC motors or positioning controllers contact maxon motor Australia Tel. +61 2 9457 7477.

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New positioning controllers: maxon’s EPOS4 Compact 50/5 (on the left) and the EPOS4 Module 24/1.5 (pictured right). © maxon motor

Innovation, DC motor technology and the medical industry.

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The number of worldwide medical patents filed in 2015 was more than twelve-thousand. The term “innovation” certainly applies to this industry.

In the field of medical technology, surgeon’s tools and machines are becoming smaller. Robotic assistance is commonplace in prostate surgeries. Minimally invasive surgery, surgical tools that can reach sensitive and in-depth parts of the brain once considered too high-risk, are being explored. Machines that aid faster patient recovery times and robots that assist in rehabilitation. Maxon motors are at the forefront of medical technology, working along-side Universities, start-ups and multi-national corporations. Medical applications that have maxon DC motor technology and expertise include the da Vinci Robot, wheelchairs that can climb stairs, aortic pumps for heart patients, implantable dosage systems, robotic exoskeletons, surgical tools and prosthetics.

For more information on DC motors in medical applications speak to a Sales Engineer from our Sydney office Tel. +61 2 9457 7477 or visit http://medical.maxonmotor.com.au for more application examples.

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For more stories visit maxon motor’s driven magazine available on-line at maxonmotor.com.au © maxon motor

 

 

DC motors in medical technology

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The new edition of maxon motor’s magazine, driven, focuses on developments in the medical industry.

Surgeon’s tools, robotics and machines used in medical technology are developing at a fast pace. The latest maxon motor magazine looks at hand held surgeon tools, robotic devices, measuring tools and machines to aid faster patient recovery times, less invasive procedures and pin-point precision surgery.

Published two times a year in English, Chinese and German, maxon’s magazine is available free of charge. For more information visit magazine.maxonmotor.com or for even more blogs, stories and videos visit maxon motor’s drive.tech site.

Maxon DC motors for specialist medical equipment in a bio hazardous environment

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An Australian company designed and manufactured specialist equipment for use in a mortuary.

An Australian company has designed and manufactured a specialist trolley for use in a mortuary. The design incorporates matching motor and gearbox technologies from maxon partners KAG and Apex Dynamics. The robust DC motor manufactured by KAG was a perfect match with the Apex Dynamics high precision Spiral Bevel Gearbox. Unique considerations for the gear-motor combination such as IP ratings, axial and radial loadings, and corrosive environment were important in this specialist application. The gearbox features a high mechanical rigidity with a single piece construction, precision ground gear sets to optimise efficiency, low backlash and were sealed and lubricated for life.

For more information on DC motors for specialist medical equipment applications please contact maxon motor Australia on Tel +61 2 9457 7477.

Deakin University unveils a ground-breaking surgical robot that uses maxon DC motors and controllers

 

 

 

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When performing microsurgery using the HeroSurg robot, surgeons have an added sense of touch. Fitted with two maxon motors, the DC RE25 & EC-max, and EPOS controllers.

Sat behind a computer or even thousands of kilometres away, using the HeroSurg robot a surgeon is able to operate with specific precision and a new sense of “touch”. Through the use of ground-breaking technology the HeroSurg gives Surgeons a “feel” for the tissue they are working on. Primarily used for laparoscopic and keyhole surgery, this means less aggravation on healthy tissue leading to improved healing time, less blood loss & risk of infection and a shorter stay in hospital. The patient’s overall healing time is generally lessened too.

The HeroSurg is fitted with maxon RE25 and EC-max22 motors. The RE25 DC motor is high-quality, both compact and powerful, equipped with powerful permanent magnets. The centerpiece of the motor is the ironless rotor. The EC-max is a robust, brushless DC motor with speeds up to 20,000 rpm.

For more information please visit Deakin University website or contact maxon motor Tel +61 2 9457 7477.

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Main Pic: the HeroSurg robot © Deakin University
Above: the maxon DC motors and controller as found in the HeroSurg robot © maxon motor

Modern robotic equipment, a lot of hard work and maxon DC motors.

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maxon DC motors can be found in robotic aids, in some cases assisting incomplete paraplegic people to walk again.

Swiss company, Hocoma, is making huge in-roads using robotic equipment to assist in the rehabilitation of people with neurological movement disorders, stroke and incomplete paraplegic patients. There are four different types of equipment that assist with muscular strengthening exercises, exercising joints, sense of balance and improving circulation. In some cases, the equipment has assisted some people to start walking unaided again.

Brushed and brushless maxon DC motors and controllers can be found in all four of Hocoma’s robotic devices. The brushed maxon RE-40 DC motor was selected for its powerful density, ease of control, efficiency level of more than 90% and robust design. The motors ironless rotor delivers low inertia packed with a powerful punch. Also utilised are the maxon brushless EC-60 flat / pancake motors, chosen for their small and compact size and ability to deliver high speeds.

For more information please contact maxon motor Australia on Tel +61 2 9457 7477.

Pictured: the maxon RE-40 brushed DC motor; the maxon EC-60 pancake motor and the maxon ESCON 70/10 controller.

DC motor with right angle gear and planetary gear.

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A unique DC motor and gearhead combination developed for an Australian customer providing solutions for robotic rehabilitation.

When high power levels and tight space constraints are required, maxon motor tailor a solution. maxon motor Australia recently developed this motor and dual gearhead design for a robotic exoskeleton application for rehabilitation of children with disabilities. Gearing with the high efficiency level of over 98% on the right angle transfer has been achieved with the use of an sealed, oil filled helical bevel design. A custom adaptor section has then been specifically manufactured to affix a 52mm 113:1 ceramic planetary gearhead at the helical gearbox input. The use of ceramic components within the planetary gearhead increases the lifespan typically by three times compared to traditional steel planetary gearboxes. The 50mm diameter 48V 200W DC maxon motor also achieves the high efficiency of 94%. maxon motor are renowned for high efficiency DC motors but the careful design and selection of the drivetrain components in this gear motor system has set new benchmarks. A common 500cpt incremental encoder has been fitted to the motor back shaft and when combined with the gear ratio and maxon motor control software quad counting, gives a system positioning capability of 0.001 degree. Such a fine positioning capability is also only possible with the assistance of the patented maxon motor rhombic coreless winding that gives a completely smooth motion void of any mechanical detent or magnetic cogging.

For assistance with the design and supply of customised DC gear motor combinations contact maxon motor Australia Ph: +61 2 9457 7477.