Compact linear encoder suitable for feedback applications

6th October 2017
Lanna Cooper


A new, miniature, exposed linear encoder system has been introduced by HEIDENHAIN with the capability of resolving to 2nm. This performance is maintained at high traverse speeds up to 240m/min over long scale lengths to a maximum of 3,040mm. Machine builders in the semiconductor manufacturing, metrology and micromachining sectors are prospective users.

Consisting of a scanning unit and glass scale, the LIP 6000 was developed to have large mounting tolerances, automatic signal adjustment, a small interpolation error of ±3nm and a very low noise level of 1nm RMS. The encoder is suitable for feedback applications where constant speed control is needed or stability of position is important.

The scanning unit contains HEIDENHAIN’s HSP 1.0 ASIC signal processor, which is virtually unaffected by contamination on the glass scale. Having an 8µm grating period, the scale is secured to the machine using clamps or an adhesive and is either of G8 glass or Zerodur G0 glass-ceramic. Homing and end-of-travel limit functions are included.

The encoder system does not have to be paired and adjusted prior to shipment, which means that the head and scale can be combined as desired by the user, assisted by the mounting wizard in the software provided.

Weighing 5g and measuring just 26x12.7x6.8mm, the LIP 6000 is suitable for installation in machines where space is limited and/or axis acceleration is high. 1V peak-to-peak or TTL interfaces are available, with serial interfaces to follow soon. Operating temperature range is -10 to 70°C and protection is to IP50.

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