EMDT_European Medical Device Technology

European Medical Device Technology, Spring 2015

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marketplace In Focus 38 | Spring 2015 European Medical Device Technology emdt.co.uk Motors and Motion Control Servomotor controller An addition to the Escon family of servomotor controllers from maxon motor AG, the Module 24/2 controller is a miniaturised OEM plug-in module the size of a postage stamp. This high- performance four-quadrant pulse- width-modulation servocontroller is designed to command permanent- magnet-activated brushed dc motors and brushless dc motors with Hall sensors at power levels as high as 48 W for continuous output and 144 W in terms of peak output. Functionality innovations, according to the manufacturer, include resistance-capaci- tance servo-signal evaluation for speed and current set values, current-limiter offset, and an option to predefine analogue speed ramps. maxon motor AG Sachseln, Switzerland +41 41 666 1500 www.maxonmotor.com Ceramic piezo actuators Multilayer ceramic PICMA piezo actuators from PI Ceramic, a subsidiary of Physik Instrumente GmbH & Co. KG, are designed to resist the influence of humidity, temperature and operating voltage at the site of application such that their service life and reliability are unimpaired. In these durable, high- power actuators, the piezo ceramic is a monolithic block with active layers made up of thin ceramic films and surrounded by an all-ceramic insulating layer. This protects them from humidity and from failure caused by an increase in leakage current. The actuators can be manufactured in virtually any shape. Low operating voltage in the 100-V range, response times of a few microseconds, and their ability to hold a position with minimal power consumption are characteristics that make these components suitable for medical technology applications that demand high reliability. Physik Instrumente GmbH & Co. KG Karlsruhe, Germany +49 7214 8460 www.pi.de Pinch-valve clamp technology Sonceboz SA, an ISO 13485–certified specialist manufacturer and supplier of customised motors and drive systems, offers a new linear drive that offers a range of configuration capabilities. A sturdy geared motor forms the basic element, onto which various options can Brushless dc servomotor The Series 3274 BP4 brushless dc servomotor from Dr. Fritz Faulhaber GmbH & Co. KG measures 32 mm in diameter and 74 mm in length, and delivers continuous torque of 165 mNm. It also weighs just under 320 g, about half as much as conventional motors with comparable power, according to the company. The four-pole servomotor is suited for applications such as robotic link drives, electric process-automation grippers or high-performance traction drives for inspection robotics, requiring high power and dynamic start-stop operation along with low total weight. Overload resistant and operating without wear-prone mechanical commutation, it offers an operational lifetime exceeding that of traditional dc micromotors and is able to work under harsh ambient conditions, including low temperature, owing to its stainless-steel housing and adhesiveless assembly. This servomotor series features a flexible design. Digital Hall sensors are standard components, and high-resolution optical and magnetic encoders can be attached to the rear flange. Optionally, the motor is available with analogue Hall sensors that can replace an encoder in many applications. Adding a performance-optimised precision gearhead from the manufacturer's selection completes the drive system. Dr. Fritz Faulhaber GmbH & Co. KG Schönaich, Germany +49 7031 6380 www.faulhaber.com

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