ETEL 0348M-070-02D-004 Linear Encoder – High Precision
The ETEL 0348M-070-02D-004 is a high‑accuracy linear encoder designed for position feedback in demanding motion control systems. It offers superior resolution and repeatability, making it an essential component for applications that require nanometer‑scale positioning. The encoder is based on optical or magnetic scanning principles, providing non‑contact measurement with minimal hysteresis and wear.
This model is part of ETEL’s 0348M series, known for its robustness and signal stability over long distances. The 0348M-070-02D-004 features a measuring length of 70 mm and a resolution down to sub‑micrometer levels. Its compact sensor head and flexible tape or glass scale options allow installation in confined spaces, while the integrated electronics ensure noise‑immune signal transmission.
Key Features
High Resolution: Up to 0.1 µm interpolated, enabling precise position feedback.
Non‑Contact Scanning: No mechanical friction, ensuring long life and consistent accuracy.
Immunity to Contamination: Sealed design protects against dust, oil, and coolant.
Various Interfaces: Supports incremental, absolute, and sine‑cosine output formats.
Easy Alignment: Installation with visual or mechanical aids reduces setup time.
Wide Temperature Range: Operates reliably from 0 to 50 °C, with optional expansion for extreme conditions.
Technical Specifications
The encoder has a grating period of 20 µm, with interpolation factors up to 512x, yielding a resolution of 0.04 µm. The output signals are differential with low noise and high slew rate, compatible with most servo amplifier and controller inputs. Supply voltage is 5 VDC ±5%, and current consumption is less than 100 mA. The sensor head measures 30 x 15 x 10 mm, and the scale tape can be cut to custom lengths. The encoder includes a reference mark for establishing a home position.
Applications
Semiconductor Manufacturing: Wafer stages, reticle alignment, and inspection tools.
Machine Tools: Feedback for linear axes and rotary tables.
Coordinate Measuring Machines: High‑precision length measurement.
Laboratory Automation: Micro‑positioning stages for research and development.
Installation and Integration
The 0348M-070-02D-004 is designed for simple mounting using adhesive tape or mechanical clamps. The sensor head can be adjusted in three axes for optimal gap and alignment. Electrical connections are made via a shielded cable with a D‑sub or M12 connector, and the encoder is compatible with standard quadrature counters and interpolation units. ETEL provides calibration certificates and software tools for verifying signal amplitude and offset.
Benefits
Precision: High resolution and low signal noise for accurate axis control.
Reliability: Robust construction withstands vibration and thermal changes.
Flexibility: Multiple interface options and scale lengths.
Cost‑Effective: Long service life with minimal maintenance.
Conclusion
The ETEL 0348M-070-02D-004 linear encoder is a trusted solution for critical position feedback. Its combination of high precision, durability, and ease of integration makes it a preferred choice for engineers building next‑generation motion systems. With this encoder, you can achieve the accuracy and repeatability required for the most challenging applications.
