The low-cost plasma atomizer in the present study successfully synthesized stainless steel spherical powder using an energy source of less than 3 kVA. Repeated testing was conducted to examine the resulting spherical powder, among other observations, using a digital microscope (Dino-Lite AM4115), scanning electron microscopy (SEM-FEI-Inspect F50), and energy dispersive spectroscopy (EDS). To ensure the purity of the resulting 316L stainless steel spherical powder, EDS was used for qualitative and quantitative elemental analysis. The results showed that the 316L stainless steel spherical powder particles varied in size from 26 µm to 180 µm with average particle diameters of approximately 82.6 µm, making them ideal for biomedical applications. The results of the feed metal flow rate on the powder weight percentages for particle sizes <50 µm for 2 mm 3 /s feed metal flow, 3 mm 3 /s feed metal flow, and 4 mm 3 /s feed metal flow were 26.04%, 28.04%, and 13.09%, respectively. It is possible that this could occur because greater metal flow rates require greater plasma energy to form liquid metal droplets, so that a lower metal flow rate at the same energy consumption makes it possible to produce more metal powder in smaller particles.

This paper discusses the building of a low-cost CNC router machine. In designing a CNC machine using an electrical actuator as the driving force, we use a nema 23 stepper motor combined with a pitch 2 mm timing belt to drive the machine on the x and y axes. On the z-axis, we use a stepper motor and a linear screw to drive the machine. This machine is often used to cut and engrave wood, acrylic, and PCB objects. The design drawing that has been made on the PC is sent to the microcontroller using serial communication, then the CNC performs work on the thing according to the coordinates. The spindle will create a pattern on the thing automatically according to the design drawing. Measurement was made using a caliper with an accuracy of 0.05 mm.  This CNC machine is performing duly as ordered by the mach3 micro controller. The machine test results show an accuracy value of 99.85% on the x-axis, 99.74% on the y-axis, and 99.12% on the z-axis.

Penelitian ini bertujuan untuk mengetahui pengaruh rasio keuangan (Debt Equity Ratio, Current Ratio) terhadap kinerja keuangan (Return on Equity) dengan (Return on Assets) sebagai variabel moderating. Metode yang digunakan dalam penelitian ini adalah metode deskriptif dan analisi. Alat analisis menggunakan metode regresi berganda dan regresi berganda demoderasi. Populasi dalam penelitian ini meliputi beberapa perusahaan makanan dan minuman yang terdaptar di bursa efek Indonesia (BEI) pada tahun 2011-2015. Teknik pengambilan sampel dalam penelitian ini  adalah metode purposive sampling dengan 12 perusahaan barang konsumsi sektor makanan dan minuman sebagai sampel.Hasil dari penelitian ini menunjukan bahwa secara parsial Debt Equity Ratio terhadap Return on Equity tidak berpengaruh dan tidak singnifikan. Begitupun Current Ratio terhadap Return on Equity juga tidak berpengaruh dan tidak signifikan. Pada pengujian berikutnya variabel Debt to Equity dan Current Ratio yang diperkuat (minusnya) hubungannya oleh variabel moderating Return on Assets terhadap Return on Equity.