Redesigned linear stages improve processes by up to 98 per cent

Key areas of performance improvement for the latest PRO-LM and PRO-SL/SLE positioning stages are as follows:

• Up to 98 per cent improvement in positioning resolution
• Up to 46 per cent improvement in positioning repeatability
• Up to 40 per cent improvement in geometric error motions
• Up to 33 per cent improvement in positioning accuracy

The two new sizes added to the PRO-LM (linear motor) series stage line are the PRO115LM and PRO190LM. New features include a linear encoder option on PRO-SLE ball-screw stages, absolute encoder options on both the linear motor and ball-screw stages, and direct mounting to Imperial and metric optical tables.

All PRO series stages employ a long-life recirculating linear guide bearing system and a low-friction sealing concept for long life in industrial applications such as laser machining. The PRO series design provides protection from debris while the side-seals prevent dirt and particulates from entering the stage. The curved hard-cover prevents excessive debris from collecting on the stage.

The base mounting holes are accessible from the outside of the stage to allow for easy mounting. Standard mounting holes for both Imperial and metric optical tables are provided in all travels. The tabletop is available with both Imperial and metric mounting patterns and can be ordered with brush attachments to clear any debris that may collect on the stage hard cover. Tabletops have hole patterns for the direct attachment of Aerotech's ADRS, ACS-LP, ADRT, ACS, and AGR rotary stages, making multi-axis system design and implementation quick and easy.

Temperature compensation

All PRO series stages are now available with Aerotech's ThermoComp feature, an embedded temperature compensation unit that guarantees accurate positioning not only in variable-temperature environments but also during extended use of ball-screw-driven stages. Using ThermoComp protects the process, even in harsh industrial environments.

PRO-LM stages are optimised with high-precision, non-contact linear encoders. Incremental and absolute encoders are available as standard options and enable minimum incremental motion down to 5nm and sub-micrometre repeatability. Optional HALAR factory calibration improves positioning accuracy to +/-0.75um. Travels range from 50 to 1500mm for standard models with speeds of up to 2m/s.

Aerotech's high-power U-channel linear motors drive the PRO-LM series. The ironless forcer coil provides high force with zero cogging for super-smooth velocity and position control. This ironless design is suitable for applications requiring outstanding contour accuracy and smooth velocity profiling. The linear motor has zero backlash, no windup, zero friction and excellent dynamic responsiveness.

Enhanced positioning specifications coupled with competitive pricing make the PRO-SL/SLE ball-screw stage series useful for both medium- and high-performance applications. For applications requiring direct-metrology of the output carriage, the PRO-SLE integrates a direct linear encoder. Amplified sine, digital TTL output, and absolute encoders are available as standard options for linear feedback.

The PRO-SL/SLE series is designed with many standard features and options that make the design very flexible and enable it to be easily tailored to a specific application. Travels range from 50 to 1000mm with speeds of up to 300mm/s. Aerotech BM or BMS series brushless servomotors are available with a variety of encoder options. Minimum incremental motion is to 50nm. A holding brake can be added to the motor for vertical applications. A motor foldback kit is available for space-constrained applications to reduce the overall stage length.

All PRO series stages are available in cleanroom prepared and vacuum versions. Follow the link for more information about the PRO-LM and PRO-SL/SLE stages.