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Numerik Jena: Incremental Linear Encoder (LIA 20 Series)
Numerik Jena: Incremental Linear Encoder (LIA 20 Series)
 
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Order #: LIA-20
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Description Specifications and Drawings
 

Numerik Jena: Standard Linear Incremental Encoder (LIA 20 Series)


Our exposed linear encoders consist of a scanning head and a scale tape. These measuring systems are basically characterized by the following main features:

  • The users slide system takes over the steering between the scanning head and the scale tape

  • Non-contact optical scanning of the scale tape by the scanning head, thereby no mechanical retroactive effect on the slide system

  • Low space requirement and uncomplicated assembly

  • High traversing speed up to 10 m/s

  • Signal interpolation up to 100 times integrated in the measuring head or the connector and high resolution up to 50 nm

  • Large mounting tolerances

  • Automatic signal adjustment after mounting possible

  • High scale accuracy up to ±1 µm

  • High interpolation accuracy and low sensibility to contamination due to dynamic offset- and amplitude control

  • Reference signals with increment-precise repetitive accuracy independent to the reference marks’ approach

  • Defined thermal behaviour supported by our DOUBLEFLEX scale tapes


Typical fields of application:

  • Production and inspection machines for the semiconductor industry

  • Linear units and linear drives

  • Coordinate tables

  • Measuring machines and measuring microscopes

  • Robotics

  • Precision devices in reprography

  • Precise machining

  • Positioning and measuring devices in medical technology


LIA 20 Features:

The LIA Series combines precision and ease of use in one device. With its integrated 2-field EPIFLEX sensor module it is geared up for rougher applications also.

  • With EPIFLEX sensor module (2-field scanning)

  • Individually configurable

  • 1 Vpp or RS 422 output signal

  • Up to 100-times signal interpolation

  • Smallest measuring step 50 nm

  • Traversing speed up to 10 m/s (with 1 Vpp)

  • Decreased sensitivity to contaminations due to 2-field scanning

  • Flexible mounting due to several mounting possibilities

  • Wide range of accessories available


Stainless Steel Scales

The SINGLEFLEX-scale tape consists of a single stainless steel tape with an applied incremental track and one or more reference marks or a PRC code. The scale tape is equipped with a double-sided adhesive tape and can be mounted easily on the machine element.


The DOUBLEFLEX-scale tape consists of two superimposed stainless steel tapes. Both of them are divided by a tension uncoupled sheen of oil which ensures the adhesion between the steel tapes. The incremental track and one or more reference marks or a PRC code are applied on the upper steel tape. The lower steel tape is equipped with a double-sided adhesive tape and can be mounted easily on the machine element.


The two steel tapes are uncoupled mechanically. This ensures that the upper steel tape can expand independently of the lower steel tape due to thermal variations of the ambient temperature. By reference of the ambient temperature and the expansion coefficient of the steel tape it is possible to determine occurring length deviation of the increments. This allows you to subtract out the deviation of the measurement results.


Glass Scales

For applications with special environmental conditions (e.g. magnetic fields, heat sources, vacuum, etc.) or for special demands on the dimensions we also offer scales made of glass.


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