After the active LaserTracer system has set new standards in the calibration of machine tools and coordinate measurement machines, Etalon has extended its product range with a passive version of the LaserTracer specially designed for small and medium-sized machine tools.
The LaserTracer-MT is guided mechanically by highly accurate spherical joints and very smooth and damped telescopic stages. Moreover, it makes use of a newly developed metrological beam guiding method of the laser interferometer. Thus, it was possible to create a new system with considerably reduced size and weight, while still making use of the proven principle of the heavier LaserTracer.
The LaserTracer-MT is a self-tracking laser interferometer with nanometer resolution that fundamentally simplifies the acquisition of geometric errors of small and medium-sized machine tools with axis lengths up to 1.5 m: Using conventional measuring equipment, the determination of all geometrical deviations of a 5-axis machine requires extraordinary efforts – the entire process can take several days. In contrast, the LaserTracer-MT by Etalon requires no more than three to four hours to comprehensively track all geometrical deviations of a 5-axis machine.
Combined with the elaborate software TRAC-CAL, the LaserTracer-MT equipped with a multi-telescopic stage analyses the whole working volume of the machine tool. It delivers an accuracy of 1 µm and determines position deviations, straightness deviations, rotational deviations (pitch, yaw, roll), and the squareness of axes to one another. Angular positioning deviations, axial and radial movements, and wobbling of the rotational axes are comprehensively recorded as well.
The compensation data obtained such is automatically transferred to the control software of the machine tool. The result: Maximum reduction of all geometrical errors, process-reliable production starting from the first component, and thus, almost no scrap or rework.
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Published in Optik&Photonik, issue 2/2014.
|Accuracy||U(95%) =1 µm|
|Measurement volume||260 mm–980 mm|
|Angular range swivel axis||unlimited|
|Angular range pitching axis||-30° - 85°|
|Weight||2 kg (without electronic box)|