ETEL SA-LE 03-208 Linear Motor – High Precision Direct Drive
The ETEL SA-LE 03-208 is a high-performance linear motor designed for precision motion control applications. With a length of 208 mm, this motor is known for its compact dimensions, high force density, and exceptional reliability. The direct drive architecture eliminates mechanical transmission components, providing zero backlash, high stiffness, and superior dynamic performance.
This linear motor is specifically designed for applications requiring smooth, high-acceleration motion with nanometer-level positioning accuracy. Its low cogging force and minimal force ripple ensure stable velocity control, making it ideal for scanning, inspection, and precision assembly tasks. The SA-LE 03-208 is compatible with a wide range of encoders and servo amplifiers, offering flexibility for system integrators.
Key Features
Compact Design: 208 mm length enables integration into space-constrained machines and stages.
High Force Density: Delivers substantial force within a compact envelope.
Low Cogging Force: Optimized magnetic design ensures smooth motion even at low speeds.
Direct Drive Technology: Eliminates backlash, friction, and wear associated with mechanical transmissions.
High-Resolution Feedback Compatibility: Supports optical and magnetic encoders for nanometer-level positioning.
Robust Construction: Sealed housing protects against dust and coolant ingress.
Technical Specifications
The SA-LE 03-208 operates with a three-phase winding configuration and is designed for use with 230 VAC or 400 VAC servo drives. It delivers a continuous force of up to 30 N and a peak force of up to 90 N, depending on the cooling conditions and duty cycle. The motor has a length of 208 mm and is designed to work with ETEL's magnet tracks to achieve various stroke lengths.
Electrical characteristics include low inductance and resistance, enabling high bandwidth current control and rapid current rise times. The motor is compatible with incremental, absolute, and sine-cosine encoders, providing flexible feedback options for various control architectures.
Applications
Semiconductor Manufacturing: Wafer handling, stepping, and inspection stages.
Electronic Assembly: Pick-and-place machines, component placement, and wire bonding.
Laser Processing: Precision cutting, engraving, and marking systems.
Medical Device Assembly: High-precision positioning for diagnostic instruments.
Integration and Installation
Integrating the SA-LE 03-208 into a motion system is straightforward, thanks to its standardized mechanical and electrical interfaces. The motor can be mounted in horizontal, vertical, or inverted orientations, providing flexibility for machine designers. Electrical connections are made via robust industrial connectors, with shielding to ensure EMC compliance.
Proper alignment between the motor coil and the magnet track is essential for achieving optimal performance. The recommended air gap is typically between 0.5 and 1.0 mm, and precision shims or adjustable mounting brackets are available to simplify the alignment process.
Benefits
Increased Throughput: High acceleration and deceleration capabilities reduce cycle times.
Improved Quality: Low force ripple and high resolution enable superior surface finish and process stability.
Reduced Maintenance: No mechanical wear components result in lower total cost of ownership.
Design Flexibility: Compact size and multiple mounting options allow for creative machine layouts.
Conclusion
The ETEL SA-LE 03-208 linear motor offers a compelling combination of compact size, high precision, and reliability. Its direct drive technology, robust construction, and flexible integration options make it a preferred choice for engineers developing advanced automation systems.
