This innovate ve interdisciplinary study deals with influence of fine motor skill level (finger dexterity) of individual on his measurement results in metrology practice. The main objective of this study was determinate fine motor skill level of individuals using a motor test. Further determinate the potential effect of different fine motor skill levels on accuracy of measuring using a mechanical handheld sliding caliper. Fine motor skill test and metrological test were implemented. Pursuant the results of fine motor skill test were probands divided into 2 groups. The groups are significantly different on accuracy of measurement (p=0,006). Pearson coefficient shows a significant correlation r = -0.66 between the Purdue Pegboard test and a measurement error. Results confirmed that the fine motor skill of the upper limbs (especially finger coordination) significantly influence accuracy of measurement using a mechanical handheld sliding caliper.
In the previous paper [12], a design of location and construction of a rotating turning tool has been documented. Sporadically, this tool has appeared in literature [1], [2], [3], [4] in different applications. So far its operational characteristics, mainly its considerable influence on machined surface quality, exceptional durability and possibility to be used to turn hard machinable materials have not been appreciated. Some of its priorities are verified in the paper.
Increased emphasis on productivity and machining quality is the cause of constantly looking for progressive chip machining technologies to meet this requirement. One of this option is the use of specific turning with an actively driven tool. This unconventional turning method makes it possible to select higher feed values while keep the required tool life. However, it is important to identify the properties and all possible applications of such an actively driven tool during the machining process. The paper focuses on the resulting state of the machined surface of the workpiece in terms of surface roughness parameters due to the feed values. For the sake of clarity, the knowledge and findings of active rotation machining are compared to self-propelled rotary turning.
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