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Gantry CMM Range Launched BY LK Metrology

Coordinate Measuring Machine (CMM) manufacturer LK Metrology has introduced a new series of large-capacity models to sit alongside its established bridge-type machines and very-large-scale gantry-type machines, both of which use ceramic moving guideways providing high accuracy.

Using the latest innovations in aluminium and steel CMM guideway technology, the new AEROS gantry-type CMM encompasses a total of 40 model variants. With measuring volumes up to 8.0 x 3.5 x 2.5 metres AEROS allow a broader spectrum of manufacturers in industries such as aerospace, power generation, automotive and defence to benefit from the latest 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. The open design is extremely adaptable, providing full access to the work area during loading and unloading of parts. It is particularly well suited to Smart Factories with autonomous guided vehicles and manually operated wheeled or rail-type material handling systems.

For consistent accuracy and dimensional stability, innovative design features have been incorporated into the AEROS range to minimise distortions and errors of inertia. Particular attention has been paid to the design of the guideway support system, which allow 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 generous dimensioning of the distance between air bearings provides optimal mechanical rigidity. 0.1 µm optical linear scales provide accurate positional feedback and precise motion control, with a dual-reader head system on both X-axis guideways providing excellent metrology performance.

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 metres to 2.5/1.8 metres, the X-axis being from 3 metres to 6 metres.

A micro-machined, advanced alloy, Y-axis cross-beam and lightweight extruded aluminium Z-axis spindle 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 an impressive 500 mm/sec and 1,200 mm/sec/sec respectively.

The AEROS S model cover measuring volumes dictated by Y/Z axis travels from 2.5/1.8 to 3.0/2.0 metres and an X-axis up to 6 metres. While being similar in construction to AEROS machines, offering nearly equivalent attributes, machines have a cross-beam of stabilised tubular steel construction. 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/sec/sec.

The AEROS P model features coupled dual-drive and dual-reader head positioning in the X-axis to minimise structural deformation during movement thereby guaranteeing excellent metrology performance. Y/Z axis travels are from 2.5/2.0 metres to 3.5/2.5 metres and the X-axis is up to 8 metres. Both the X and Y axes employ a rack and pinion drive while the Z-axis features a zero hysteresis friction drive. Measuring accuracy, speed and acceleration are the same as for the AEROS S.

A full range of probing options is offered to suit all types of metrology application, including multi-sensor technology, touch trigger probes, scanning probes, laser scanners and 5-axis probe systems. On offer also is an advanced array of software, including LK CAMIO 2021 measurement, programming, analysis and reporting software, while the Industry 4.0 Metrology Gate portal provides remote access to quality data and CMM status from any internet-connected device anywhere in the world.

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