Looking for a way to quickly and accurately calibrate a fast-performing machine tool, robot or coordinate measuring machine? If so, check out the XL-80 laser interferometer calibration system from Renishaw (www.renishaw.com; Hoffman Estates, IL), which takes readings at 50 kHz, and provides linear measurement speed of up to 4 m/sec. And this is while providing a resolution of 1 nm. A signal gain switch permits an 80-m linear range for those with big pieces of equipment, or provides increased signal strength at shorter ranges. Measurements are based on the wavelength of a stabilized HeNe laser source.