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HEIDENHAIN also supplies linear encoders for other applications, such as Manual machine tools Presses and bending machines Automation and production equipment Please request further documentation.

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 can eliminate a number of potential error sources: Positioning error due to thermal behavior of the recirculating ball screw Hysteresis Kinematic error through ball-screw pitch error Linear encoders are therefore indispensable for machines that must fulfi ll high requirements for positioning accuracy and machining speed.

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Mechanical design

The linear encoders for numericallycontrolled machine tools are sealed encoders: An aluminum housing protects the scale, scanning carriage and its guideway from chips, dust, and fl uids. Downward-oriented elastic lips seal the housing. The scanning carriage travels in a low-friction guide within the scale unit. A coupling connects the scanning carriage with the mounting block and compensates the misalignment between the scale and the machine guideways. Depending on the encoder model, lateral and axial offsets of ± 0.2 to ± 0.3 mm between the scale and mounting block are permissible