#SPS17 Gearing specialist exhibits.

17/10/2017

Aerospace, medical and automotive engineers will be able to speak with Harmonic Drive AG to improve the accuracy and efficiency of their applications at this year’s SPS IPC Drives show in Nuremberg (D). Harmonic Drive AG will be launching its FHA-C Mini Servo Actuators with Absolute MZE encoder at stand 119 in hall four, from November 28-30, 2017.

The exhibition brings together suppliers of electric automation technologies from all over the world to discuss the future of automation and new innovative products. Visitors will have the chance to eat sushi while talking to Harmonic Drive AG engineers about its range of servo actuators and learn how its multi-turn absolute motor feedback system can increase productivity.

Designed to offer high transmission reliability, even in environments with high electromagnetic interference (EMI), the FHA-C Mini Servo Actuator has a specially developed output bearing, which uses preloaded precision and high tilting capacity.

With a multi-turn absolute encoder mounted directly on to the motor shaft, the actuator can provide accurate signals for positioning directly at the load. This is ideal for design engineers working in the medical and automation sector, where creating accurate and reliable devices is imperative.

“Automation provides a number of opportunities for businesses to improve the efficiency of their processes,” explained Graham Mackrell, managing director of Harmonic Drive UK. “Harmonic Drive FHA Mini Servo Actuators have been created so that they can be combined with the YukonDrive® Servo Controller. When connected, the actuator can be tailored for use in demanding dynamic applications.

“In addition to being customisable, the actuators feature a multi-turn absolute motor feedback system that acquires the absolute position directly at the load, with maximum accuracy over more than 600 revolutions. The productivity of the servo actuator is increased because unproductive referencing is no longer required, allowing it to deliver smooth and quiet running characteristics.”

• The SPS IPC Drives show brought together 63,291 people at last year’s event, with over 500 exhibitors coming from countries outside of Germany.
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It IS rocket science!

13/03/2017

Graham Mackrell, managing director Harmonic Drive, explains why its strain wave gears have been the top choice in space for over forty years.

Anything that goes into space is seen as the pinnacle of human creation. Astronauts are highly trained and are at the peak of physical fitness, space shuttles are crafted by large teams of expert engineers and all the technology used is so high-tech it’s as if it belongs to science fiction.

Driving on Mars!

Many decades ago, the first Harmonic Drive gears were sent into space during the Apollo 15 mission. Even from the beginnings of the space race, the expectations for the technology used were high. The equipment used in space had to be reliable, compact and lightweight and given the increasing demands on equipment in today’s space missions, it must also now be highly accurate with zero backlash and have high torque capacity.

When aerospace engineers were recently designing a new space rover, they looked to Harmonic Drive gears for reliability. Due to the obvious difficulties of performing repairs in space, a high mean time between equipment failures is a high priority. Harmonic Drive products achieve this by prioritising quality throughout the entire design and manufacturing process.

It is vital that aerospace gears are thoroughly tested before they are sent to customers, ensuring that they always receive a quality product. At Harmonic Drive, we test products using finite element method (FEM) testing. This process simulates real world physics to ensure that the product is capable of surviving in space. For example, structural testing is carried out to ensure the product is robust and the space rover travelling over rough terrain will not damage the actuators used in the wheels. Thermodynamic properties are also important as aerospace gears are often exposed to both extremes of the temperature range, which are tested in the initial design process.

Also considered in the design process is the part count of the aerospace gears. Harmonic uses a low part count which means that they are maintenance free. In addition, there is a lower chance of components failing giving the gears a high Mean Time Between Failure (MTBF). This also contributes to the compactness and light weight of the gears, a feature essential in space.

Another key feature for aerospace gears is high torque capacity and zero backlash. This is essential for systems which communicate the location of the rover to the control room. If traditional, high backlash gears were to be used, the system would misreport the rover’s location. This would cause problems when the rover is used to survey uncharted areas of planets and could lead to inaccurate mapping. Due to the emphasis on high precision with Harmonic Drive gears, this problem can be avoided.

The numerous quality processes that Harmonic Drive undertakes have led to recognition from a number of accrediting bodies. Harmonic Drive products are AS9100 certified, a specific aerospace standard for the design, manufacture and sale of precision gear reducers, servo-actuators and electro-mechanical positioning systems.

To be the pinnacle of global technology, there are no shortcuts. Components used in aerospace technology must be subject to vigorous testing in order to be reliable, safe and have a long product life.

• The MARS adventure: The NASA site.
@HarmonicDriveUK #PAuto #Robotics @StoneJunctionPR