Perancangan dan Pembuatan Prototipe Robot sebagai Penggerak Ujung Peralatan Plasma Medicine untuk Perawatan Luka

Plasma medicine adalah kajian baru yang bersifat multidisiplin yang berupaya menerapkan teknologi plasma untuk terapi kesehatan, seperti perawatan luka dan penyembuhan kanker. Pada saat ini plasma medicine penggunaanya masih berbasis manual yang pengoperasiannya mempunyai resiko tinggi pada manusia sebagai operator mesin. Penelitian ini bertujuan untuk merancang sebuah alat yang mampu menggerakan plasma medicine secara otomoatis dengan pengendali jarak jauh untuk mengurangi resiko kecelakaan kelistrikan pada operator manusia. Alat ini menggunakan konsep pada mesin cnc, drawing machine, dan axidraw yang di gerakan dengan 2 motor stepper nema 17 dan dikendalikan oleh komputer melalui arduino uno, lalu plasma medicine ditempatkan pada ujung alat ini. Diharapkan plasma medicine dapat digerakan secara leluasa dan menghasilkan hasil yang lebih optimal.

Program Pelatihan Gambar Teknik Menggunakan Aplikasi AutoCAD di SMK Muhammadiyah 3 Samarinda

Vocational students need some skills that will be used when students finish their studies at school. One of the expected skills is the ability to draw using the AutoCAD program. Where the final ability is expected of the students will be able to create engineering drawings in the form of 2-D models. The purpose of the training program is to develop and improve the technical drawing skills of the XII class students in using the AutoCAD program. Therefore, the students of class XII SMK have the ability to draw machine components and other engineering drawings in 2-D format. The method used in this training program through pre-test instrument, AutoCAD module, discussion, display through slide how to make machine image in 2-D formats and practice how to make the engineering drawing then evaluated with post-test. The result of this program is the improvement of the ability of grade XII students in drawing machine components and other engineering drawings in 2-D format.

Tribological Investigations on Tool Surfaces for Temperature-Supported Forming of Magnesium AZ31 Sheets

Aiming to decrease friction coefficient ( μ ) during the forming of magnesium alloy sheets, nine (9) tools with different hole geometries in their surface (flat, elliptical, and circular) were manufactured from steel Boehler W400 VMR (as known as DIN 1.2343). Tribological investigations were accomplished on a strip drawing machine at 288 °C without lubricants. When compared with a standard tool (surface flat), on average, tools with circular geometries in their surface showed the smallest friction coefficient, while tools with elliptical geometries shown higher. The friction coefficient also was confronted with the ratio between area occupied by holes in the surface of the tool and the total tool surface (i.e., factor f (%)), hole diameter (Ø), and the distance between circle centers (d(c,c)). Principal Component Analysis (PCA) complemented the experimental approach. In summary, both approaches (experimental and theoretical) indicated that the manufactured tool with circular geometries on its surface presented lower friction coefficient values on the forming processes of the magnesium AZ31 sheets.

Increasing the production capacity of copper drawing machine in the cable industry using SMED method: A case study in Indonesia

Indonesian Government has electricity program of 35,000 Megawatt. To make this program successful, all cable companies begin to implement strategies to satisfy these needs. Increasing the production capacity is the main program implemented by cable companies in Indonesia. One of the cables companies has production output on copper drawing machine of 11 unit of bobbins per shift with the production process cycle time of 32.32 minutes per bobbin. To improve production capacity, improvements need to be performed to reduce the cycle time of the production process. This research was conducted by applying fishbone and Pareto analysis resulting in three main research problems. SMED methodology was implemented in this research by separating two activities, namely internal setup and external setup, then turning the internal setup to external setup in order to reduce the overall processing duration. From the three main research problems, it results in processing duration reduction from 32.32 minutes to 23.18 minutes or a reduction of 28.28 percent. This reduction can improve the production capacity from 11 unit of bobbins to 16 unit of bobbins per shift or 360 unit of bobbins monthly or increasing the production capacity of 45.45 percent. This SMED program is very suitable for similar companies in cabling field and having old machines so that they do not need to invest by purchasing a new machine.