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Friday, May 27, 2016
VOLUME -27 NUMBER 5
Publication Date: 05/1/2012
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May 2012 Issue
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Heidenhain Intros RSF Slim Linear Encoders
Slim profile linear encoder.
Schaumburg, IL — RSF Elektronik has released a slim profile linear encoder series MSA 700 and 800, using what the company describes as innovative new design. Sources explain it is tailor-made for metrology applications that require protection from contamination. Typical applications for these encoders are optical comparators, and video and vision systems. The main advantages offered by the encoders are generous mounting tolerances, low level backlash and optimized thermal behavior.
Central to the innovative design of the series MSA 700 and 800 encoders is the reading carriage and reading head connected by a wear-free and maintenance-free magnetic coupling. The carriage is also constrained by a magnet guide that affects the ferromagnetic tapes on the extrusion. Hence, there are no forces that stress guide parts and no contact points that can wear prematurely. Improving upon old roller bearing or spring coupled encoders, the new magnetic coupling and guide provides even pressure along the measuring length. This allows for generous mounting tolerances without any negative influence on accuracy. An additional benefit of this magnetic coupling is the extremely low backlash, reducing one of the main weaknesses of sealed encoders.
The fiber-reinforced sealing lips, made of fluororubber (Viton), are wear and coolant resistant, allowing the encoder to operate in harsh environments. High velocities are also possible due to the high degree of rigidity and ideally formed blade area of the reading head.
The scale itself is fastened with a flexible adhesive film in the profile, which compensates for the differing linear expansion between the glass and the aluminum. Thus, a reproducible thermal growth is ensured by symmetrical expansion or shortening of the scale to the profile.
Expansion differences between the aluminum profile and machine slide are accommodated by flexible fastening elements.
The new incremental linear encoders have grating pitches of 20, 10, and 8 microns, and come in accuracies of 2, 3 and 5 microns. They can be customized to suit customer specifications.
Contact: Heidenhain Corp., 333 E. State Parkway, Schaumburg, IL 60173
847-490-0387 E-mail: email@example.com Web:
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