Linear scale

LIF 401 R

Measuring standard*

Coefficient of linear expansion

SUPRADUR phase grating on Zerodur glass ceramic or glass; grating period 8 µm

αtherm = (0±0.1) · 10–6 K–1 (Zerodur glass ceramic)

αtherm ? 8 · 10–6 K–1 (glass)

Accuracy grade*

±1 µm (only for Zerodur glass ceramic), ±3 µm

Baseline error

≤ ±0.225 µm/5 mm

Measuring length ML* in mm

70 120 170 220 270 320 370 420 470 520 570 620 670

720 770 820 870 920 970 1020

Reference marks

One at midpoint of measuring length

Mass

0.8 g + 0.08 g/mm measuring length

Scanning head

AK LIF 48

AK LIF 47

Interface

  1 VPP

? TTL

Integrated interpolation*

Signal period

–

4 µm

5-fold

0.8 µm

10-fold

0.4 µm

20-fold

0.2 µm

50-fold

0.08 µm

100-fold

0.04 µm

Cutoff frequency –3 dB

–6 dB

≥ 300 kHz

≥ 420 kHz

–

Scanning frequency*

–

≤ 500 kHz

≤ 250 kHz

≤ 125 kHz

≤ 250 kHz

≤ 125 kHz

≤ 62.5 kHz

≤ 250 kHz

≤ 125 kHz

≤ 62.5 kHz

≤ 100 kHz

≤ 50 kHz

≤ 25 kHz

≤ 50 kHz

≤ 25 kHz

≤ 12.5 kHz

Edge separation a1)

–

≥ 0.080 µs

≥ 0.175 µs

≥ 0.370 µs

≥ 0.080 µs

≥ 0.175 µs

≥ 0.370 µs

≥ 0.040 µs

≥ 0.080 µs

≥ 0.175 µs

≥ 0.040 µs

≥ 0.080 µs

≥ 0.175 µs

≥ 0.040 µs

≥ 0.080 µs

≥ 0.175 µs

Traversing speed1)

≤ 72 m/min

≤ 100 m/min

≤ 120 m/min

≤ 60 m/min

≤ 30 m/min

≤ 60 m/min

≤ 30 m/min

≤ 15 m/min

≤ 60 m/min

≤ 30 m/min

≤ 15 m/min

≤ 24 m/min

≤ 12 m/min

≤ 6 m/min

≤ 12 m/min

≤ 6 m/min

≤ 3 m/min

Interpolation error

Position noise RMS

±12 nm

2 nm (450 kHz)2)

–

Electrical connection*

Cable, 0.5 m, 1 m, 2 m or 3 m with 15-pin D-sub connector (male); interface electronics in the connector

Cable length

See interface description, however 
Incremental: ≤ 30 m; homing, limit: ≤ 10 m; (with HEIDENHAIN cable)

Voltage supply

DC 5 V ±0.25 V

Current consumption

< 175 mA

< 180 mA (without load)

Vibration 55 Hz to 2000 Hz

Shock 11 ms

≤ 200 m/s2 (EN 60 068-2-6)

≤ 500 m/s2 (EN 60 068-2-27)

Operating temperature

0 °C to 50 °C

Mass Scanning head*

Connecting cable

Connector

For Zerodur glass ceramic scale: 25 g

For glass scale: 9 g

38 g/m

140 g

* Please select when ordering

1) At a corresponding cutoff or scanning frequency

2) With –3 dB cutoff frequency of the subsequent electronics