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This paper deals with topic of evaluation of precise metrology application. Current state of measuring problems in the field od automotive industry often suppose that inspection of product guarantee the quality of this product. This idea is even stronger if the inspection is done by CMM. Research team tried to confirm or disprove importance of human factor for automatic measuring cycle of CMM. Using real parts with tolerances 11x bigger, that declared possibilities of CMM team of researchers done MSA analysis. Result of the experiment confirmed that the importance of human factor starts way above precision of CMM and it is necessary to focus on.

In technical practice, the concept of surface roughness plays an irreplaceable role. This property has been evaluated by various techniques and mathematical approaches since the 1920s. However, evaluation is often underestimated and reduced to find the Ra or Rz parameter. This occurs regardless of methodology. It represents a totally unacceptable simplification of the issue. The following article will clarify a "small" part of this vast issue. Nowadays, there are two basic options for measuring roughness. The first option is the contact method; the second option is the non-contact measurement method. Each method has its advantages and disadvantages and is typically used only for a specific application (2D or 3D roughness measurement).This paper focuses on the contact measurement of 2D surface area, specifically the choice of the size and shape of the stylus tip. This article maps the problem of choosing a stylus tip in the interval where the standard ISO 4288: 1999 permits usage of both stylus tip sizes. This concerns the roughness range Ra = 0.1 ÷ 2 μm (aperiodic surfaces) and the range of the parameter Rsm = 0.13 ÷ 0.4 mm (periodic surfaces). The article further compares the use of a new stylus and an old (worn) one.

Nowadays there are high demands on efficiency and economy in engineering production. Therefore, CAM systems are used to prepare programs for modern productive NC machines. These systems are in most cases well prepared for roughing operations and the modern machining strategies are applied. Anyway for product quality the finishing operations are more important. The finishing operations which combine modern methods of machining with adaptive tool path generation are usually not present. Absence of such operations is most evident when machining complex surfaces. The aim of the research was to determine the effect of a constant volume of the chip to the load of the cutting tool. The tests were performed according to the idea of constant volume removal. The result is that the effect of the constant volume of the chip influences the cutting tool load but the effect is not so significant and we must continue and develop the theory to find the correct attitude to surface finishing operations.

Demands of product precision in chain supply in Automotive are on very high level. Usually there is focus on the fields of process control, productivity, reliability and repeatability of all the preparatory steps. But there is sometimes one area, which is in the background -protection of parts before sweat aggressiveness. In this article there is analysis of influence of surface behavior of non-ferrous part by the sweat of the worker or operator.