The present research presents a comparative analysis between experiments conducted with basic equipment for a portable INSIZE ISR - C002 roughness tester and a specially made for the purpose attachment to the device. An analysis is made of the proposed basic device for working with a portable roughness tester INSIZE ISR - C002, and its shortcomings have been determined. In order to facilitate the operator's work with the device and obtain more accurate results, a special device is developed. It is designed using CAD/CAM products and manufactured using additive printing (3D printing). The additive printing technology used reduces its cost. The manufactured device is analyzed and its advantages and disadvantages are determined. Experiments are conducted with both devices and a comparative analysis of the obtained results is made. An analysis of the measurement system (MSA) is made, through which the results of the conducted experiments were analyzed. The comparative analysis shows a number of advantages of the new device compared to the basic one, which provide a basis for the formulated conclusions and recommendations.

This paper presents a statistical analysis of the quality of a technological process by investigating the surface roughness of shafts for electric motors obtained during machining. Repeated measurements have been carried out using a portable roughness tester INSIZE ISR - C002 and the results are summarized. Statistical analysis is applied to analyse the accuracy, adjustability, and stability of technological process. The stability of the process is presented by investigating the correlation between the experimental and theoretical curve of the quality index. Accuracy evaluation is performed by calculating the accuracy coefficient. The adjustability analysis is evaluated by the relative position of the distribution curve of the obtained quality index with respect to the tolerance field.

Polymers are essential materials in the fabrication of partial and complete dentures, where their mechanical properties directly impact durability, comfort, and clinical performance. This study examines the influence of different manufacturing temperatures on the surface hardness of polymeric materials used in dental applications. A total of 60 experimental samples with a rectangular shape of Vertex ThermoSens polymer (Vertex Dental, 3D Systems, Soesterberg, The Netherlands) were fabricated through injection molding at 280 °C and 300 °C and analyzed over time to assess changes in their properties. Hardness measurements, conducted using the EQUOTIP Shore D hardness tester (Proceq SA, Schwerzenbach, Canton of Zürich, Switzerland), indicated increased hardness over time, with higher values observed in samples fabricated at 300 °C. A two-way ANOVA was performed to evaluate the statistical significance of temperature and time on hardness, revealing a significant effect (F = 14.73, p = 0.0185). These findings suggest that processing polymers at elevated temperatures improves surface hardness, significant for denture longevity and patient comfort. Increased hardness contributes to greater wear resistance. Optimizing polymer manufacturing conditions can thus lead to improved clinical outcomes, ensuring more durable and biocompatible dental prostheses.

This article presents an experimental study aimed at determining the optimal printing temperatures for the nozzle and the build plate when printing ABS by evaluating the geometric accuracy of the parts. The recommended printing temperatures were analyzed, and various operating temperature regimes were selected for the nozzle and the build plate. The experimental part is based on single-factor and two-factor experiments. An analysis of the manufacturing process was also performed. Despite the experimental determination of the optimal temperatures, the manufactured parts do not meet the specified tolerances. Further research is needed to determine the shrinkage coefficient and to make corrections to the initial model.

World healthcare trends require the food industry to improve constantly the nutritional values of basic confectionery products such as sponge cakes. A new flour

A variety of factors have been shown to influence each measurement process, including environmental elements, the characteristics of the measured object, and the capabilities of the measuring instrument. These factors can be categorised into several overarching groups: external factors, the measurement object, the measuring instrument, and the operator. The present paper sets out a methodology for the evaluation of part quality in the domain of optical manufacturing. The methodology under discussion employs a measurement system analysis (MSA) method. Typically, MSA is applied to two or three operators; however, in this study, it is performed for four operators. In the course of the experiments, ten optical workpieces, lenses, are measured, with each lens undergoing three measurements. Each of the four operators measured the same set of lenses, employing the same measuring instrument. The measurement of identical parts and apparatus serves to eliminate the influence of the measuring instrument on the measuring system and to evaluate the influence of the operator. The objective of this work is to demonstrate the feasibility of employing MSA as a method for assessing the quality of more than three operators. To this end, four distinct analyses are implemented to assess the influence of each operator in relation to the others.