## 1 Introduction  
Deformations of thin-walled structures are being studied because of serious problems involved in component manufacturing [1]. Machining, including milling, of such products is complicated by low stiffness, which affects machining vibrations and, as a result, reduces the surface qualities of the finished products [2; 3; 4; 5; 6]. To remain competitive in the market, manufacturers of structures need to use dimensional tolerances tighter than before [7; 8; 9]. The use of harder materials and the demand for efficient manufacturing processes with the ability to create high-quality parts has led to the development of specialized tools, machining methods, and strategies for shaping individual operations when making parts by milling. It has been observed that the machining strategy has a significant impact on the characteristics of the finished product, so the development of new milling machining strategies to improve the machining process as well as the quality of the manufactured part can be seen [1; 2; 3; 4; 5; 6; 7; 8; 9]. One of the newer strategies for machining parts is adaptive milling, which is not yet widespread in research. The goal of this strategy is still to conduct machining more efficiently and effectively while ensuring sufficient quality of manufactured parts. Among other things, the strategy is used for groove shaping, the goal of which is to keep the tool in constant contact with the workpiece material for as long as possible and is derived from trochoidal milling [10; 11]. The interest in thin-walled structures is seen in several industries, including aerospace. Needless to say, thin-walled structures reduce the total structure weight of structures, thus lowering operating costs [1]. The largest share in thin-walled aerospace structures have aluminum alloys, while the use of titanium alloys and of nickel alloys are also noted [12; 13; 14; 15]. Although the percentage of nickel alloys in relation to the entire aircraft structure is low, these materials are studied extensively. Ni alloys are used in heavy-duty operation, while the products used in turbines are subject to restrictive requirements in terms of their shape and manufacturing quality [16]. The development of new methods in the metrology of manufactured products has made it possible to measure dimensional accuracy through modern measuring machines. This process aims to verify that the manufactured product conforms to the designed shape [17; 18; 19]. The most significant development and most comprehensive application is in modern optical methods. Such measuring machines include the 3D optical scanner from GOM, Zeiss Group. The scanner operates in triple scanning mode. Precise stripe patterns are projected onto the object's surface and recorded simultaneously by two stereovision cameras. Based on the image of the mapped surface shape (waveform), the coordinates of the characteristic points on the three-dimensional surface created by the stripes' intersections (projected in three directions) are determined. The geometry data of the surface of the manufactured object collected by this method are compared with the nominal data of the designed object shape. Presentation of the results takes place in the form of a color map, giving the deviation of the dimensions according to the adjusted scale [20; 21]. An important advantage of this method is a much faster procedure than that in contact-based coordinate measuring machines. Additional advantages are the possibility of measuring surfaces of complex shapes, the possibility of evaluating selected dimensions after the measurement of the prepared point cloud, and the possibility of checking the dimensional deviation in each tested area (based on the color map) [1]. One of the difficulties when applying this machine is the measurement of small-sized parts, due to the necessity of projecting stripes on the surface of the product to evaluate the position in space [1; 21].