4/26/2017 | 1 MINUTE READ

Galvo Scanner Enables Micron-Level Accuracy

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Rapid 2017: The scanner is said to be thermally stable and offer high resolution.

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Aerotech says that its AGV-HPO scanner systems can be calibrated down to single-digit, micron-level accuracy over the field of view, thanks to highly repeatable and thermally stable feedback sensors. According to the company, the scanners maintain consisten micron-level placement accuracy and consistent part-to-part quality without the need to recalibrate between parts. 

 The AGV-HPO control connections consist of two 300-mm cables terminated in 25-pin D-style connectors. The cables can be oriented in any direction to ensure there is no interference with beam delivery. The AGV-HPO is also available with right-and left-side input apertures for “mirror image” machine builds or side-by-side scanner mounting with a single laser beam split to source both scanners. The location of the AGV-HPO mirrors can be captured and analyzed in real time. The process can be optimized prior to marking the part, saving time and reducing material waste. The state of the laser can also be controlled based on in-position and velocity criteria, further reducing programming complexity.

The scanner uses Aerotech's motion and position synchronized output (PSO) capabilities that have been developed for traditional servo-based laser processing applications. Contouring functions can automatically reduce speeds in tight corners or small radii to minimize overshoot. The laser can be triggered based on the position feedback of the mirrors to ensure consistent spot overlap as the scanner changes speed. Aerotech’s Infinite Field of View (IFOV) function combines servo and scanner motion to extend the marking capability of the scanner across the entire travel of the servo stages, eliminating stitching errors that can occur in a more traditional move-expose-repeat process.

The AGV-HPO family is available with 10-, 14-, 20- and 30-mm input apertures and can be equipped with an F-Theta or telecentric lens .

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