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Heidenhain: Exposed Linear Encoders (LIP Series)
Heidenhain: Exposed Linear Encoders (LIP Series)


 
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Heidenhain: Exposed Linear Encoders (LIP Series)
For very high accuracy


Linear encoders from HEIDENHAIN for numerically controlled machine tools can be used nearly everywhere. They are ideal for machines and other equipment whose feed axes are in a servo loop, such as milling machines, machining centers, boring machines, lathes and grinding machines. The beneficial dynamic behavior of the linear encoders, their high permissible traversing speed, and their acceleration in the direction of measurement predestine them for use on highly-dynamic conventional axes as well as on direct drives.


HEIDENHAIN also supplies linear encoders for other applications, such as:

  • Manual machine tools

  • Presses and bending machines

  • Automation and production equipment


Advantages of Linear Encoders

Linear encoders measure the position of linear axes without additional mechanical transfer elements. The control loop for position control with a linear encoder also includes the entire feed mechanics. Transfer errors from the mechanics can be detected by the linear encoder on the slide, and corrected by the control electronics. This makes it possible to eliminate a number of potential error sources:

  • Positioning error due to thermal behavior of the recirculating ball screw

  • Reversal error

  • Kinematics error through ball-screw pitch error

Therefore, linear encoders are indispensable for machine tools on which high positioning accuracy and a high machining rate are essential.


Linear encoders measure the position of linear axes without additional mechanical transfer elements. This eliminates a number of potential error sources:

  • Positioning error due to thermal behavior of the recirculating ball screw

  • Reversal error

  • Kinematics error through ball-screw pitch error


Linear encoders are therefore indispensable for machine tools on which high positioning accuracy and a high machining rate are essential.


Exposed linear encoders are designed for use on machines and installations that require especially high accuracy of the measured value. Typical applications include:

  • Measuring and production equipment in the semiconductor industry

  • PCB assembly machines

  • Ultra-precision machines such as diamond lathes for optical components, facing lathes for magnetic storage disks, and grinding machines for ferrite components

  • High-accuracy machine tools

  • Measuring machines and comparators, measuring microscopes, and other precision measuring devices

  • Direct drives


Mechanical Design

Exposed linear encoders consist of a scale or scale tape and a scanning head that operate without mechanical contact. The scales of exposed linear encoders are fastened to a mounting surface. The flatness of the mounting surface is therefore a prerequisite for high accuracy of the encoder.


Encoders with Position Value Output | LIP 200 Series

The LIP 211 and LIP 291 incremental linear encoders output the position information as a position value. The sinusoidal scanning signals are highly interpolated in the scanning head and converted to a position value by the integrated counter function. As with all incremental encoders, the absolute reference is established with the aid of reference marks.


Incremental Encoders | LIP Series

The LIP exposed linear encoders are characterized by very small measuring steps together with very high accuracy and repeatability. They operate according to the interferential scanning principle and feature a DIADUR phase grating as the measuring standard.


Model No.: LIP 211, LIP 281, LIP 291, LIP 372, LIP 382, LIP 471, LIP 481, LIP 571, LIP 581


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