Updated HEIDENHAIN LIF 400 Encoder Offers Improved Contamination Resistance

After more than 10 years of success in the marketplace, HEIDENHAIN’s LIF 400 series of encoders has been redesigned with several improvements. The updates to this exposed linear kit style encoder includes much improved contamination resistance. The new LIF 400 series has a position noise value of 0.6 nanometers at 1MHz and a low interpolation error down to +/- 12 nanometers. Industries that could take advantage of this encoder are semiconductor, metrology, micromachining, and medical.

One of the major updates is the incorporation of the HEIDENHAIN Signal Processor (HSP1.0) custom ASIC into the scanning unit which helps lower interpolation error, and also powers through contamination on the scale as it adjusts the LED intensity every signal period while moving at up to 4 meters per second. The compensation adjusts the amplitude and phase of the signals allowing the control to see constant perfect signals even with contaminants such as large fingerprints, dust, and wafer pieces that may be on the glass scale.

Another addition is a status LED on the connector that indicates the status of the incremental signals and can also be used as a general mounting indication providing a simple red/green display for the signals and blue for a good reference mark signal. The connector is also smaller than the older version saving space and improving accessibility.

The glass scale and mechanics of the scanning head are unchanged and scanning units can be ordered with the 1-volt peak-to-peak interface with 4-micron signal period, or TTL versions with resolutions down to 10 nanometers.

For more information: www.heidenhain.com