L18B

Photoelectric linear encoder L18B is able to have the measuring length of up to 3.240 mm, maximum accuracy of ±5 µm to any meter within the ML and grating periods of ±20 µm, ±40 µm.



Mechanical Data

Measuring lengths (ML), mm





70; 120; 170; 220; 270; 320; 370; 420; 470; 520; 620; 720; 820; 920; 1020; 1140; 1240; 1340; 1440; 1540; 1640; 1740; 1840; 1940; 2040; 2140; 2240; 2340; 2440; 2540; 2640; 2740; 2840; 2940; 3040; 3140; 3240
(other intermenate lenghts on request)

 

Accuracy grades to any meter within the
ML (at 20°C)

- for ML 70 to 2040: ± 10; ±5 μm (optional)
- for ML 2040 to 3240: ± 10 μm

Grating period 20 μm; 40 μm (optional)
Reference marks (RI)




- standard for ML ≤ 1020 mm: 35 mm from both ends of ML
- standard for ML > 1140 mm: 45 mm from both ends of ML
- optional: one RI at any location, or two or more RI's separated by distances of n x 50 mm or distance-coded

Max. traversing speed


- when interpolation factor is 1,2,5,10: 1 m/s
- when interpolation factor is 25: 0.5 m/s
- when interpolation factor is 50: 0.4 m/s

Required moving force with sealing lips < 3 N
Protection (IEC 529)

- without compressed air: IP53
- with compressed air (optional): IP64
Weight 0.4 kg + 1.0 kg/m
Operating temperature 0...+50°C
Storage temperature -20...+70°C
Permissible vibration (40 to 2000 Hz) ≤ 30 m/s²
Permissible shock (11 ms) ≤ 100 m/s²

Electrical Data

Version L18B-A ∫ 11 µApp L18B-AV ∫ 1 Vpp L18B-F Π TTL
Supply voltage + 5 V ± 5 % / < 90 mA + 5 V ± 5 % / < 120 mA + 5 V ± 5 % / < 120 mA
Light source LED LED LED

Resolution
Depends on external subdividing electronics Depends on external subdividing electronics
5; 1; 2.5; 0.5; 0.2; 0.1 µm (after 4 - fold dividing in subsequent electronics)
Incremental signals

Two sinusoidal I1 and I2
Amplitude at 1 kΩ load:
- I1 = 7 - 16 µA
- I2 = 7 - 16 µA

Differential sine +A / -A and +B / -B
Amplitude at 120 kΩ load:
- A = 0.6 - 1.2 V
- B = 0.6 - 1.2 V

Differential square-wave U1 / U1 and U2 / U2. Signal levels at 20 mA load current:
- low (logic "0") ≤ 0.5 V
- high (logic "1") ≥ 2.4 V

Reference signal

One quasi-triangular I0 peek per revolution. Signal magnitude at 1 kW load:
- I0 = 2 - 8 µA (usable component)

One quasi-triangular +R and its complementary -R per revolution. Signals magnitude at 120 W load:
- R = 0.2 - 0.8 V (usable component)

One differential square-wave U0 / U0 per revolution. Signal levels at 20 mA load current:
- low (logic "0") < 0.5 V
- high (logic "1") > 2.4 V

 

Maximum operating frequency

50 kHz

 

50 kHz

 

50xk kHz, when interpolation factor is 1,2,5,10
1000 kHz, when interpolation factor is 25, 50
Direction of signals I2 lags I1 at reading head displacement from left to right + B lags + A at reading head displacement from left to right U2 lags with U1 at reading head displacement from left to right
Maximum rise and fall time - - < 0.5 μs
Standard cable length 3 m; without connector 3 m; without connector 3 m; without connector
Maximum cable length 5 m 25 m 25 m

Accessories

Drawings

Typical Applications

           
   
           
           

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