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Heidenhain: Exposed Linear Encoders (LIF Series)For 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:
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.
Incremental Encoders | LIF Series
The LIF exposed linear encoders have a measuring standard manufactured in the SUPRADUR process on a glass substrate and operate on the interferential scanning principle. They feature high accuracy and repeatability, are especially easy to mount, and have limit switches and homing tracks. The special version LIF 481 V can be used in high vacuum up to 10–7 bar (see separate Product Information sheet).
Model No.: LIF 471, LIF 481