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Product category: Rotary Position, Tilt and Angular Sensors
News Release from: Newall Measurement Systems | Subject: Microsyn Digital
Edited by the Engineeringtalk Editorial Team on 03 June 2003

Encoders add accuracy to simulator
motion base

The first six-degrees-of-freedom (6DOF) motion base to feature electromagnetic linear motors that incorporate digital encoders is to be premiered at this year's Paris Air Show.

The first six-degrees-of-freedom (6DOF) motion base to feature electromagnetic linear motors that incorporate digital encoders is to be premiered at this year's Paris Air Show The E-Mag 2000 motion base incorporates Newall Measurement System's Microsyn Digital systems housed in the platform's ServoRam motor units

The new integrated design generates fast, accurate and reliable positional data that is used to create real-time military, training and entertainment simulations.

Otherwise known as a Stewart platform, the new E-Mag 2000 design can be used as a stabilisation unit or as part of a state-of-the-art simulator.

The system relies on six ServoRam units to replicate movements and, to maximise accuracy, incorporates reconfigured Microsyn Digital encoders connected to each ServoRam piston in a closed-loop assembly.

Entirely housed within the ServoRam's cylinder, the compact digital encoders measure the position of the piston and relay that information back to a drive controller.

The accuracy and repeatability afforded by Newall's digital encoders is an important aspect of the new platform, which can reach speeds of 3m/sec and pull up to 3G of acceleration.

Designed by Advanced Motion Technologies in conjunction with RWE Nukem, the new system replicates roll, pitch, sway, surge, heave and yaw.

The new ServoRam, which is a key component of the E-Mag 2000 system, features a bespoke version of Newall's Microsyn encoder.

"By fitting a 5um encoder internally, we have made a significant step forward in the design of Stewart platforms", Jamie Randell, Design Department Manager at RWE Nukem, noted.

"This is the first time a motion base has been fitted with digital transducers".

He went on to explain that the compact and robust design of the Microsyn encoder was a major factor in Newall winning the contract for 14 linear encoders.

"Newall's Microsyn encoder is very precise, it is extremely reliable and is capable of high accelerations.

Since it has very few moving parts, we expect it to outlast something like a wire-pull transducer by a factor of up to six".

As the Microsyn Digital's ingenious ball-based design is impervious to oil, dust, coolant and other workshop contaminants, it exhibits none of the wear characteristics usually associated with conventional encoder technologies.

The robust design removes the need for costly maintenance and ensures levels of repeatability definable between 0.2 and 5um and within one resolution count.

Its high resistance to shock (up to 100G) and vibration (up to 30G) means it can also be fitted in almost any environment.

Mark Hudman, Technical Director at Newall said: "This contract illustrates the adaptability and high-performance characteristics of the Microsyn Digital encoder, as well as our ability to work in conjunction with major technology developers to create custom solutions". Request a free brochure from Newall Measurement Systems ...

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