Precizika Metrology L18 optical linear encoders have a measuring length of up to 2,040 mm, a maximum accuracy of ±3 µm per meter within the gauge length (ML), and grid periods of ±20 µm, ±40 µm (optional). These are often used on CNC machines, but also for measurement and quality control equipment. We offer the 470 mm measuring length type (ML) here, which is only available with an accuracy of +/- 3 microns per meter of length (+/- 3 µm). We work with the TTL (+5VDC) types, also known as RS422. RS422 is a differential signal protocol that ensures very reliable signal transmission.

These TTL linear encoders are compatible with the Delta A2 and A3 servo drivers. This means that this encoder can be connected to the CN5 input of the servo driver and used for direct positioning. This eliminates potential pitch errors in ball screws or gear deviations in rack and pinion systems. This can help create highly accurate machines. Great care must be taken to ensure there is very little or no backlash; otherwise, it is very difficult to create a stable PID control loop.

From the same brand, we also offer a simple DRO (Digital Read Out) that can be used with these linear encoders for simple measurements on manual machines or in the quality control process. It is a relatively inexpensive device that is very useful for simple setups.

Component features:

• Measuring length: 470 mm
• Cable length: 3000 mm (no connector connected)
• Signal type: TTL (+5V +/-5%, current <120mA) (RS422)
• Resolution: 0.1 micron (after 4-fold division in electronics)
• Grid period of ±20 µmInterpolation factor: 50
• Maximum frequency: 1000 kHz (when the interpolation factor is 50)
• Incremental or absolute: Incremental
• Incremental signals: Differential square wave U1/U1 and U2/U2
• Reference signal: One differential square wave U0/U0 per revolution
• Low logic <0.5V (logic 0)
• High logic >2.4V (logic 1)
• Accuracy: +/- 3 microns per meter length (+/-3 µm)
• Reference marks (RI): 35 mm from both ends of ML
• Required movement force with sealing lips: 3N
• Max. displacement speed: 0.4 m/s (24,000 mm/min) (When the interpolation factor is 50)
• Operating temperature: 0…+50°C
• Storage temperature: -20…+70°C
• Permissible vibrations (40 to 2000 Hz) = 30 m/s²
• Permissible shock (11 ms) = 100 m/s²
• Protection (IEC 529) without compressed air: IP53
• Weight: 1.2 kg (0.4 kg + 0.8 kg/meter)
• High-quality component made in the EU (Lithuania)
• Precizika item number: L18-F01-0470-S-03-S-03/W-78
• OPTIONAL: Protection (IEC 529) with compressed air: IP64
• OPTIONAL: Reference marks: One RI on each location, or two or more RIs separated by distances of n x 50 mm or with distance coding
• OPTIONAL: Longer cables (or extension cables, see the compatible products tab) (MAX 25 meters)
• OPTIONAL: Connector (D-sub, M12, M16, M17, M23 or other types)