L35

Photoelectric linear encoder L35 is an incremental linear displacement measuring device that has up to 3.240 mm measuring length, up to ±3 µm accuracy grades to any meter within the ML depending on measuring length demanded. L35 series is more vibration resistant than L18 series of encoders.



Mechanical Data

Measuring lengths (ML), mm

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 170 to 2040 mm: ± 5; ±3; ±2 μm
- for ML 2040 to 3240: ± 10 μm

Grating period 20 μm; 40 μm
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
- distance-coded: see drawing
- selection by magnets: standard - one magnet (RI) in ML middle

Max. traversing speed

- when interpolation factor is 1,2,5,10: 1 m/s (shortly 2m/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 < 5 N
Protection (IEC 529) - without compressed air: IP54
- with compressed air (optional): IP64
Weight 0.4 kg + 2.8 kg/m
Operating temperature 0...+50°C
Storage temperature -20...+70°C
Permissible vibration (40 to 2000 Hz) ≤ 150 m/s²
Permissible shock (11 ms) ≤ 300 m/s²

Electrical Data

Version L35-A ∫ 11µApp L35-AV ∫ 1 Vpp L35-F Π TTL (HTL on request)
Supply voltage + 5 V ± 5 % / < 90 mA + 5 V ± 5 % / < 90 mA + 5 V ± 5 % / < 120 mA; + 12 V ±5% / < 130 mA
Light source LED LED LED
Resolution Depends on external subdividing electronics

Depends on external subdividing electronics

5; 2.5; 1; 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 at Up = ±5V
- high (logic "1") > 2.4 V at Up = ±5V
- low (logic "0") < 1.5 V at Up = ±12V (HTL)
- high (logic "1") > (Up - 2)V at Up = ±12V (HTL)

Reference signal

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

One quasi-triangular +R and its complementary -R per revolution. Signals magnitude at 120 Ω 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 at Up = ±5V
- high (logic "1") > 2.4 V at Up = ±5V
- low (logic "0") < 1.5 V at Up = ±12V(HTL)
- high (logic "1") > (Up - 2)V at Up = ±12V (HTL)

Maximum operating frequency

50 kHz (v=1 m/s)
100 kHz (v=2 m/s shortly), where k - interpolation factor

50 kHz (v=1 m/s)
100 kHz (v=2 m/s shortly)

(50xk) kHz for k = 1, 2, 5, 10
100 kHz for k = 25, 50
Direction of signals I2 lags I



+ B lags + A

U2 lags U1 (displacement from left to right and head position down respective glass scale)
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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