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SISTEM KONTROL MESIN PENCETAK BEDAK DINGIN
Full text linkThis research aims to design and implement an automatic control system on a cold powder printing machine. The existence of this control system is expected to be able to increase the efficiency of the production process, reduce the printing cycle time, and produce products with consistent quality. The method carried out in this study consists of three stages, design, manufacturing and trial stages. Design stage, cold powder printing machine model and electronic wiring diagram. Designing the control system using appropriate microcontrollers, sensors, and actuators. The results of the work at the manufacturing stage consist of: mechanical work, electronics work, and informatics work. The last stage is to test the performance of the cold powder printing machine. The result of this research is a control system on a cold powder printer that has been programmed according to the desired. Where the author can control the speed of the AC motor using an Arduino microcontroller by setting its RPM through an inverter. The production of cold powder produced is 2,400 seeds/hour.
Keywords: AC Motor, Arduino Microcontroller, Cold Powder, Inverte
PENGARUH KONSENTRASI PEREKAT TERHADAP BIOBRIKET TONGKOL JAGUNG DENGAN METODE KARBONISASI
Full text linkThe depletion of fossil energy reserves is driven by population and economic growth. Biomass offers a promising renewable energy alternative. This study aimed to assess the effect of wood glue (epoxy) adhesive concentration on the quality of biobriquettes to meet SNI 01-6235-2000 standards. Corn cob waste was cleaned, dried for 3 days, and carbonized at 450 °C for 30 minutes. The resulting charcoal was ground and sieved (20 mesh). The adhesive was mixed with charcoal at ratios of 5%, 10%, 15%, 20%, and 25%. The biobriquettes were dried in an oven at 110 °C for 4 hours and analyzed for water content, ash content, volatile matter, carbon content, and calorific value. The highest calorific value of 5435.24 cal/g occurred at 5% adhesive, with 2.19% water content, 6.71% ash content, 42.91% volatile matter, and 47.01% carbon. Higher adhesive concentrations increased water, ash, and carbon contents while reducing calorific values.
Keywords: biobriquettes, renewable energy, corn cob
PKM EKONOMI SIRKULAR DARI LIMBAH PETERNAKAN DAN PERTANIAN RAKYAT DESA BAREMBENG KABUPATEN GOWA
Full text linkThe Circular Economy PKM from Livestock and Agricultural Waste of the Barembeng Village Community, Gowa Regency is a joint activity program with the Village Government aimed at increasing the capacity of farmers in the Village, especially in utilizing Natural Resources (SDA) in the fields of agriculture and livestock. The main source of income for the people in Barembeng Village are rice, secondary crops and plantation farmers as well as livestock breeders. Farmers and livestock breeders are still very dependent on chemical fertilizers, the price of which increases every planting season and is rare on the market, but because of their high dependence they still buy them. Lack of knowledge about managing agricultural businesses (gardens and livestock) based on natural resources in the village by implementing a sustainable circular economy, namely utilizing the potential of abundant natural resources into products of economic value, for example livestock waste, rice husks, corn straw, nuts and waste from vegetable harvests that have not become substitute feed for grass in the dry season. Circular economic sources are produced from semi-intensive livestock farming, namely in cages so that livestock waste becomes a source of income through processing into organic fertilizer to support agricultural cultivation efforts. The agricultural cultivation system does not yet recognize the use of organic fertilizers, either solid or liquid, so farmers are very dependent on the use of chemical fertilizers. Animal feed is still highly dependent on elephant grass whose growth is not optimal and is the only source of feed. The condition of partners who still need assistance to improve the economy in Barembeng Village is a justification for implementing a community service program with the theme of the Circular Economy of Barembeng Village Based on the Utilization of Agricultural and Livestock Waste. PKM activities have been carried out in the form of socialization activities, counseling, demonstrations, and assistance in the utilization of livestock and agricultural waste as a form of circular economy. The results of the pilot activity of waste utilization are in the form of organic compost fertilizer that is ready to be applied to one of the residents' agricultural lands
Keywords: Circular Economy; Economic Resources; Livestock Waste; Agricultural Waste; Barembeng Village
Investigasi Sifat Mekanik terhadap Perbedaan Media Pendingin pada Proses Induction Hardening Baja AISI 1015
No full textAISI 1015 steels have been vigorously used to numerous automotive parts. Unfortunately, it has several mechanical shortcomings due to poor hardness, wear resistance, and strength. To tackle its crucial problem, the AISI 1015 steels have been treated by induction hardening treatment at 850 oC which subsequently cooling to the ambient temperature using different cooling media of water, salt bath, and oil. The as-prepared AISI 1015 steels were then investigated its mechanical properties involving spectrometry, microstructure observation, hardness, wear, and tensile test. The AISI 1015 treated steels after induction hardening in water cooling media exhibited intriguing microstructure of vast pearlite encircle ferrite matrix. The sample also garnered significant enhancements of hardness, wear resistance, and tensile properties. These superior mechanical characteristics are believed to be catered for the induction treatment using water cooling media which boost crystalline structure transformation deliberately. Therefore, this research affords significant promise for improved mechanical properties of the AISI 1015 steels
Rancang Bangun Model Turbin Tesla Dengan Variasi Tekanan
Full text linkElectric energy is one of the essential aspects required in daily life. One of the most commonly used sources of electricity today is the steam power plant. However, the energy from this steam requires a special device to be converted into mechanical energy. The turbine used in this design is a steam turbine.The purpose of this design is to create a model of the Tesla turbine as a steam turbine, to determine the rotational speed generated by the Tesla turbine when subjected to varying steam pressures, and to determine the power generated by the generator when the Tesla turbine is subjected to varying steam pressures.The test results showed the highest rotation speed was 681 rpm, condensate water level was 1430 ml, current was 0.5 A, and voltage was 13 V with a constant load of a 12-watt lamp. The highest analysis data obtained were generator power of 0.0065 kW, mass flow rate of 0.02383 kg/s, input power of 24.162 kW, and system efficiency of 0.036%
Rancang Bangun Mesin Peniris Minyak Pada Pembuatan Abon Ikan
Full text linkTujuan penelitian ini adalah untuk mengoptimalkan abon yang dihasilkan pada proses penirisan abon ikan, guna mengoptimalkan proses produksi abon ikan di industri rumahan. Penelitian yang dilakukan meliputi perancangan, pembuatan, perakitan, pengujian, dan analisa data hasil pengujian. Metode penelitian dilakukan dengan pemilihan tempat, waktu, alat, bahan, prosedur, langkah kerja, tahap perakitan, dan proses pengujian. Adapun variabel yang diukur dalam pengambilan data alat tersebut yaitu: waktu, kapasitas, dan hasil produksi. Kesimpulan dari penelitian ini yaitu alat peniris minyak mampu meniriskan abon ikan sebanyak 18,084 Kg/Jam. Mesin peniris ini memiliki kapasitas input 5 kg dengan tabung berukuran 300 × 400 mm (dalam) dan 350 × 450 mm (luar), serta menggunakan motor penggerak XD 135 W. Hasil pengujian menunjukkan kadar minyak abon setelah ditiris berkurang signifikan dengan berat minyak rata-rata 1,968 kg dari 5 kg bahan, sehingga abon yang dihasilkan lebih kering dan memenuhi standar mutu pangan. Alat peniris minyak abon ikan terbukti lebih optimal dalam memproduksi abon dibandingkan dengan alat peniris minyak yang dijual di pasaran
Evaluasi Kinerja Struktur Gedung Kantor GKI dengan Metode Non-Linear Dynamic Time History
Full text linkJayapura merupakan ibukota dari Provinsi Papua yang memiliki kondisi geologis yang kompleks, hal ini menjadikan kota jayapura sering terdampak gempa bumi akibat adanya aktifitas pergerakan lempeng tektonik. Metode analisis riwayat waktu memodelkan struktur berdasarkan catatan rekaman gempa yang pernah terjadi berupa akselerogram gempa. Penelitian ini bertujuan untuk mengetahui nilai gaya geser dasar, perpindahan maksimum, dan simpangan antar lantai, kemudian akan ditentukan level kinerja struktur berdasarkan ATC-40. Studi kasus pada penelitian ini adalah Gedung Kantor GKI Sinode di Tanah Papua. Pemodelan struktur dilakukan menggunakan bantuan software ETABS V.20. Data gempa masukan menggunakan gempa Amberley. Proses spectral matching dilakukan untuk menyesuaikan catatan gerakan tanah pada gempa masukan dengan spektrum respon struktur bangunan. Dari hasil analisis didapatkan nilai gaya geser dasar sebesar 6466,45 kN pada gempa amberley arah X dan Y. Nilai perpindahan maksimum terbesar terjadi pada lantai dak atap sebesar 39,930 mm. Nilai simpangan antar lantai pada gempa Amberley X pada lantai 5 sebesar 43,852 mm. Nilai maximum total drift pada gempa Amberley pada arah X yaitu sebesar 0,00156617 dan pada arah Y yaitu sebesar 0,001663 sehingga level kinerja struktur gedung termasuk dalam kategori IO (Immidiate Occupancy).
 
Investigating the Effect of PV Panel Mounting Orientation under Partial Shading Conditions: a Simulation-Based Study
Full text linkThis study aims to investigate the effect of shading on the mounting orientation of PV panel and the availability or unavailability of Bypass Diodes on the performance of PV panel under partially shading conditions. In this study, for each PV panel mounting orientation, the number of PV cells that received shading was grouped into three categories: 9 cells, 18 cells and 27 cells respectively with the shading fixed vertically. The study also considers the availability and unavailability of bypass diodes. The simulation results show that with vertical shading partially covering the PV cells, the landscape mounting orientation is the best orientation for PV panels with bypass diodes to avoid the partial shading effec
Pengembangan Sistem Kontrol Penyangga Kaki pada Dental Unit
Full text linkDental unit adalah suatu alat yang dipakai oleh dokter gigi untuk melakukan pemeriksaan serta perawatan gigi dan mulut (pengeboran, penambalan, dan pembersihan). Pada perangkat dental unit terdapat bagian kursi dental unit yang digunakan pasien dalam proses perawatannya. Pengembangan sistem kontrol penyangga kaki pada dental unit dilatar belakangi dental unit yang ada pada saat ini belum memiliki kemampuan untuk menyesuaikan posisi ergonomi pada kursi dan pengontrolan pada penyangga kaki secara otomatis maka diharapkan setelah pengembangan yang telah dilakukan, kenyamanan dan keamanan pada dental unit semakin meningkat. Dental unit tipe mobile terdiri dari beberapa bagian seperti lengan, meja, sistem roda, body, sistem kelistrikan, dan sistem kontrol. Pada penelitian ini penulis secara khusus telah mengembangkan rancangan sistem kontrol sebelumya dengan mengaplikasikan Mikrokontroller Arduino ATMega sebagai pusat kendali yang mampu mengontrol semua gerakan dental chair dan instrumen pada dental unit. Berdasarkan hasil penelitian, diketahui bahwa alat kendali berupa foot controller dan panel kontrol yang telah dibuat mampu mengendalikan gerakan naik, turun, rebah, dan tegak dental chair serta mengontrol instrumen dental unit yang meliputi dental light, sistem penyaluran air, LCD, handpiece
Design Of Decision Support System Final Project Topic In Computer And Network Engineering Study Program State Polytechnic Of Ujung Pandang
Full text linkThis research is motivated by the difficulties often experienced by students in determining the topic of their final assignment that suits their interests and abilities, which results in delayed graduation. The purpose of this study is to create an accurate final assignment topic decision support system model using the Random Forest Algorithm, design a website-based decision support system to assist students in determining the topic of their final assignment, and evaluate the efficiency and quality of the system. The data used are academic grades and interests of students in the Computer and Network Engineering study program at the Ujung Pandang State Polytechnic. The results of the study show that the Random Forest Model is able to produce final assignment topic recommendations with a Cross-validation accuracy of 61.36%. The website-based decision support system designed can assist students in determining the topic of their final assignment according to their interests and academic abilities, as well as improve the efficiency and quality of the final assignment topic selection process. This research contributes to making it easier for students to find the right final assignment topic, as well as providing guidance for the development of similar recommendation systems in the future