Improvement of Position Repeatability of a Linear Stage with Yaw Minimization

Recently, due to the miniaturization of electronic products, printed circuit boards (PCBs) have also become smaller. This trend has led to the need for high-precision electrical test equipment to check PCBs for disconnections and short circuits. The purpose of this study is to improve the position repeatability of the platform unit up to ±2.5 μm in linear stage type test equipment. For this purpose, the causes of the position errors of the platform unit are analyzed. The platform unit holding the PCB is driven by a single-axis linear ball screw drive system offset from its geometric center due to design constraints. The yaw rotation of the platform is found to have a dominant effect on position repeatability. To address this problem, adding balancing weights to the platform unit and adjusting the stiffness of the LM Guides are proposed. These methods reduce the yaw rotation by moving the centers of mass and stiffness closer to the linear ball screw actuator. In the verification tests, the position repeatability was decreased to less than ±1.0 μm.

Influence of TQM on increasing sustainable competitive advantage with transformational leadership as a mediation variable

The objective of this study was to determine and analyze the impact of TQM, Transformational Leadership (TL), and Executive Ability (EA) on improving sustainable competitive advantage (SCA) in MSMEs in Banten Province based on local leading potential. The method of distributing questionnaires is used in this study to collect primary data. This study's population consisted of all owners and managers of MSMEs in Banten Province. In contrast, the sample in this study is formed of the owners and managers of MSMEs of Local Leading Potential in Banten Province. Purposive sampling was being used in the study, as well as Warp PLS V. 7.0 and SPSS Version 25 test equipment. The findings of this study were as follows: (1) TQM had a significant positive effect on TL and SCA, but not on EA. (2) TL has a statistically significant positive effect on SCA and EA. (3) EA has a statistically significant positive effect on SCA. (4) TL mediates the effect of TQM on SCA and TQM on EA, and (5) EA does not mediate the effect of TQM on SCA. VAF (Variance Accounted For) has been used to calculate mediation effects.

Testing of behavior bias

This study aims to (i) test the behavior bias of gamblers fallacy occurs at the time of uptrend and downtrend conditions; (ii) test the behavior bias of halo effect occurs at the time of uptrend and downtrend conditions; and (iii) test the behavior bias of familiarity effect occurs at the time of uptrend and downtrend conditions. The number of samples in the study was as many as 41 people. The test equipment used is One-Sample t-Test and Paired t-Test by using statistical package for social scientists (SPSS) as a static test tool. The results of this study show that: (i) Gamblers' fallacy that occurs when the uptrend condition is greater than when the condition is downtrend; (ii) Halo effect that occurs when the uptrend condition is greater than when the downtrend condition; (iii) Familiarity effect that occurs when the uptrend condition is greater than when the downtrend condition.

Technologies and Equipment for Applying Fertilizers with Water by Sprinkling Machines

Summary. The article presents the results of research on the technology of compatible introduction of mineral fertilizers with irrigation water of sprinkling machines and testing equipment for fertigation. The purpose of research - technological analysis of various types of equipment for combining fertilizer, which is used in the production practice of S.-G. Manufacturers, definition of their basic operational and technological indicators and efficiency of using fertigation technology. Research methods: theoretical, empirical - analysis of information resources, analysis of the practice of using fertigation; laboratory-field tests for information data. using measurements and experiments. Research results. The traditional methods of fertilizing - superficial and local, in particular, the disadvantages of their use are analyzed. It was noted that one of the ways of intensifying irrigated agriculture, in which the requirements for the effective use of fertilizers and reducing resource costs are multipurpose use of irrigation equipment, namely combining irrigation with fertilizers along with irrigation water. The high efficacy of fertigation is established, which is determined by the fact that the fertilizers in an easily accessible form can be introduced at those stages of plant development when they are most required. In this case, a more uniform distribution of fertilizers in the area is provided, the coefficient of their use increases, improves the quality of products, increases yield. In Ukraine there is no production of appropriate equipment for fertimation and S.-G. Manufacturers have to use for this Equipment for foreign production. In 2017-2020, testing equipment for fertigation used by Ukrainian S.-G. Manufacturers: ITL SL, Spain, Inject-O-Mfg.S., Agri-Inject, Inc. » USA. The conducted studies on the introduction of liquid fertilizer CAS showed that the parameters of the dispenser pump and other components of the test equipment provide fertilizers with irrigation water according to their desired norm. The work of the pump-dispenser does not significantly affect the pressure-consuming characteristics of the rainy machine. The use of CAS increases the technological equipment of equipment, reduces energy intensity and labor intensity of its work due to the absence of a technological operation of the preparation of a mother liquor. Conclusions. The established effectiveness of the technological operation of fertility using test equipment allows a steadily process with the appointment indicators, the quality of work and reliability that satisfy the requirements for the technological process of fertilizing with irrigation water.

Design of General Test System for Optoelectronic Equipment Based on Computer

In recent years, with the popularization of optoelectronic equipment in various industries, various reconnaissance equipment and test equipment have also appeared. Traditional test technology and system functions can no longer meet the development of optoelectronic equipment, so it is imperative to introduce general test ideas and establish a general test system.

Improvement of Position Repeatability of a Linear Stage with Yaw Minimization

Recently, due to the miniaturization of electronic products, printed circuit boards (PCBs) have also become smaller. This trend has led to the need for high-precision electrical test equipment to check PCBs for disconnections and short circuits. The purpose of this study is to improve the position repeatability of the platform unit up to ±2.5 μm in a linear stage type test equipment. For this purpose, the causes of position errors of the platform unit are analyzed. The platform unit holding the PCB is driven by a single-axis linear ball screw drive system offset from its geometric center due to design constraints. The yaw rotation of the platform is found to have a dominant effect on position repeatability. To address this problem, the methods of adding balancing weights to the platform unit and adjusting the stiffness of LM Guides are proposed. This reduces the yaw rotation by moving the centers of mass and stiffness closer to the linear ball screw actuator. In the verification tests, the position repeatability was decreased to less than ±1.0 μm.