LK Metrology Launches Large-Capacity, Lower-Cost CMMs

LK Metrology has introduced a series of large-capacity coordinate measuring machine (CMM) models to its bridge-type machines and large-scale gantry-type machines. Using the latest innovations in aluminium and steel CMM guideway technology, LK Metrology says the new Aeros, Aeros S and Aeros P gantry-type CMMs (40 models in total) lower the cost of such equipment. With measuring volumes up to 8.0 × 3.5 × 2.5 meters, the machines reportedly enable manufacturers in aerospace, power generation, automotive and defense to benefit from using 3D metrology systems.

Unlike traditional bridge CMMs, the Aeros’ main structure of support pillars and longitudinal guideways remains static, with only the gantry beam assembly moving during measurement. LK Metrology claims the open design is extremely adaptable and provides full access to the work area during loading and unloading of parts. It is said to be well suited to factories with autonomous guided carts and manually operated wheeled or rail-type material handling systems.

Design features have been incorporated into the Aeros range to minimize distortions and errors of inertia. The guideway support system enables the longitudinal beams to freely expand without risking distortion. Multiple thermistors are fitted for automatic compensation of errors due to thermal expansion of structural components in uncontrolled environments, such as production areas. Extra-wide air bearing tracks and dimensioning of the distance between air bearings provide mechanical rigidity. 0.1 µm optical linear scales provide accurate positional feedback and precise motion control, with a dual-readhead system on both x-axis guideways.

The Aeros range of machines offers a medium to large measuring volume, with configurations in a wide range of sizes to meet the requirements of large-scale metrology applications. 14 standard models span y-/z-axis travels from 2.0/1.0 to 2.5/1.8 meters; the x-axis spans from three to six meters. A micro-machined, advanced alloy, y-axis crossbeam and lightweight extruded aluminium z-axis spindle reportedly ensure a high degree of stability while reducing the effect of inertia. Zero-hysteresis friction drives are employed for the y and z axes, while a robust rack and pinion drive is used for x-axis movements. Measuring accuracy is from 5.5+6.0L/1000 µm, while maximum 3D speed and acceleration are 500 mm/sec and 1,200 mm/sec², respectively.

LK Metrology says Aeros S machines, which have 12 total models, cover measuring volumes dictated by y-/z- axis travels from 2.5/1.8 to 3.0/2.0 meters and an x-axis up to 6 meters. They have a crossbeam made from stabilized tubular steel. A dual-drive x axis is standard over 3,000 mm. Both the x and y axes employ a rack and pinion drive system while the z axis features a zero-hysteresis friction drive. Accuracy and maximum 3D speed range from 7.0+8.0L/1000 µm and 530 mm/sec respectively, with 3D acceleration at 800 mm/sec².

Aeros P machines consist of 14 standard sizes, which feature coupled dual-drive and dual-readhead positioning in the x axis to minimize structural deformation during movement. Measuring accuracy, speed and acceleration are said to be the same as the Aeros S. Y-/z-axis travels are from 2.5/2.0 meters to 3.5/2.5 meters and the x axis is up to eight meters. Both the x and y axes employ a rack and pinion drive, while the z axis features a zero-hysteresis friction drive.

LK Metrology says a full range of probing options is offered to suit all types of metrology applications, including multi-sensor technology, touch trigger probes, scanning probes, laser scanners and five-axis probe systems. An advanced array of software is also available, including LK Camio 2021 measurement, programming, analysis and reporting software, while the Industry 4.0 Metrology Gate portal provides remote access to data and CMM statuses from internet-connected devices.