The Renishaw HS20 laser head in combination with an external linear optics kit, forms a non-contact interferometric based encoder system for long axis, high accuracy, linear position feedback applications. The HS20 laser system is suitable for use in harsh machine shop environments with part per million (ppm or 1 µm/metre) accuracy being achievable for axis lengths of up to 60 m.† Features of the HS20 laser head include: • • • • • Stabilised Class II (<1 mW) HeNe laser source User selectable output resolution and update rate Industry standard AQuadB positional output 24 V system status lines Visual error reporting via two integral tri-colour LEDs A single set of configuration (DIP) switches enables the HS20 to be configured to match the application. These allow selection of nominal output resolutions of 79, 158, 316 or 633 nm when used with a single pass retroreflector based interferometer configuration, and output update rates of 16, 8, 4, 2 and 1 MHz, ensuring count integrity. A digital, serial comms output is available for direct signal strength monitoring. To maintain accuracy over a range of environmental conditions, the HS20 should be used in combination with the RCU10 compensation system, which compensates for air refractive index changes due to variations in the ambient environment. The RCU10 can also be used to convert a laser wavelength related resolution to a more standard resolution. For example, in some long axis applications the RCU10 is used to convert a resolution of 633 nm to 1 µm. LASER SIGNAL General outline and dimensions Laser Interferometer LASER RADIATION DO NOT STARE INTO BEAM CLASS 2 LASER PRODUCT 632.8nm MAX 1mW CW IEC/EN 60825-1:2007 RENISHAW plc WOTTON-UNDER-EDGE GLOUCESTERSHIRE UK † When used together with RCU10 environmental compensator

New Mills, Wotton-under-Edge Gloucestershire  GL12 8JR United Kingdom HS20 laser head performance Laser type Wavelength Maximum output power from laser tube <1 mW Laser beam diameter 12 mm centre to centre (outward and return beams) Vacuum wavelength accuracy Compensated system accuracy ±1.0 ppm When used together with RCU10 environmental compensator Range With standard linear optics With long range linear optics Analogue output signal period Retroreflector interferometer Digital quadrature nominal output resolutions Output update rates Maximum velocity Output formats RS422 differential digital...