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PERENCANAAN DAN PEMBUATAN MESIN PEMOTONG RUMPUT SEBAGAI BAHAN DASAR PAKAN TERNAK Widayanto, Erno; ,Aswatama, Ketut; Murti, Krisna; Mulyadi, Santoso
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 1 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Rumput merupakan salah satu permasalahan yang serius di Indonesia Saat ini sebagian besar rumput dihasilkan akibat aktivitas manusia. Adanya perubahan pola hidup dalam mengkonsumsi makanan serta kurangnya kesadaran masyarakat terhadap kebersihan lingkungan menyebabkan peningkatan jumlah dan jenis rumput. Masalah yang akan dibahas adalah bagaimana merancang mesin pencacah rumput organik yang menghancurkan dengan hasil butiran atau serpihan dengan luas 2 mm sampai 5 mm agar dalam proses fermentasi dapat berjalan dengan baik untuk hasil kompos lebih baik. Tujuan dari proyek akhir ini ialah merancang bagian dinamis mesin pencacah rumput organik sebagai bahan dasar kompos. Metode pelaksann yang dilakukan berupa pencarian data untuk pengrakitan alat yang kemudian dirakit dan dicoba terlebih dahulu. Kemudian terdapat penyempurnaan alat agar fungsinya lebih efektif lagi. Berdasarkan hasil perancangan dan pengujian mesin pencacah rumput, maka dapat disimpulkan: Daya yang diperlukan untuk mencacah rumput adalah 162 W, diameter pulley penggerak 70 mm dan diameter pulley yang digerakan adalah 100 mm., bahan poros yang digunakan adalah S30C dengan kekuatan tarik (σB) = 48 kg/mm2. Diameter poros yang digunakan 25 mm dan panjang poros 380 mm, Bantalan yang digunakan untuk menumpu poros adalah bantalan radial bola sudut dalam dengan nomor bantalan UCP205, Berdasarkan hasil pengujian, prosentase rumput yang keluar 90,69% sisanya 9,31% atau sebesar 0,6 kg tidak keluar, hal ini terjadi dalam setiap sekali proses dan Kapasitas mesin pencacah rumput sebesar 103 kg/jam. Dari hasil data tersebut mesin pencacah berfungsi dengan baik dan dapat menampung smapah dengan efektif.

ANALISA PROSES PENGELASAN GESEK PADA PENYAMBUNGAN BAJA AISI 1010 DAN AISI 1050 DENGAN VARIASI WAKTU DAN PUTARAN SPINDEL MENGGUNAKAN MESIN BUBUT Andana, Himawan D; Hermawan, Yuni; Sakura, Rahma Rei; Trifiananto, Muhammad; Hentihu, M Fahrur Rozy
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The development of the welding process in the current era is growing, especially in terms of components of building construction tools and machines. Friction welding is included in the type (solid state) or without filler metal (filler) in the process, the compressive force can be utilized from the friction obtained between the two workpieces to carry out the joining process. Friction welding is a solution to overcome problems that are difficult to solve using fusion welding, friction welding can be applied to two dissimilar metals while other welding methods are almost impossible. The purpose of this study was to analyze the friction welding process on AISI 1010 and AISI 1050 steel joints with variations in welding time and spindle rotation using a lathe. The combination of independent variables that can produce the highest tensile test value, namely spindle rotation of 1170 rpm and 50 seconds of welding time can produce a tensile test value of 42.55 kgf/mm2. Meanwhile, the combination of independent variables that produced the lowest tensile test value was the spindle rotation of 900 rpm and 70 seconds of welding time, namely 30.14 kgf/mm2. The most significant independent variable is spindle rotation with 80%.

PENGARUH PREKURSOR DAN ARUS TERHADAP PELAPISAN ZINC OXIDE PADA SERAT KARBON MENGGUNAKAN METODE ELECTROCHEMICAL Dinata, Fadea; Kristianta, FX; Trifiananto, M; Sidartawan, Robertus; Dwiqoryah, Rika
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 1 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Coating is a chemical process that is useful for changing the physical or mechanical properties of the material to be coated. Electrochemical is a coating technology that utilizes chemical processes assisted by electrical energy. The layers that are often grown today are layers that have semiconductor properties. One of the semiconductor layers is ZnO which is often used as a sensor or piezoelectric. This research aims to determine the effect of variations in precursor and current on the results of ZnO coating on carbon fiber used for pulse sensors. The research method was carried out experimentally using a DC Power Supply, USB Oscilloscope and Zinc Acetate Dihydrate precursor solution. The precursor variations in this study were 0.5 gr/50mL and 1.0 gr/50mL, while the current variations were 0.8 A, 1.0 A and 1.2 A. The results showed that the voltage from the pulse sensor was the most high at a precursor of 1.0 gr/50 mL with a current of 1.2 A. It can be concluded that the thickness and structure of the ZnO layer greatly influences the performance of the pulse sensor.

OPTIMASI MESIN PULPER SILINDER GANDA (PUL-1K) TERHADAP KUALITAS PENGUPASAN KOPI DENGAN METODE BOX BEHNKEN DESIGN Ali, Muhammad Mukti; Hermawan, Yuni; Jatisukamto, Gaguk; Darsin, Mahros; ,, Sumarji; Hardiatama, Intan
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The expansion of plantation area increased by 74.33% with a growth rate of 1.61%, in 1980 the area of coffee plantation area was 707,464 ha, while in 2016 the area was 1,233,294 ha. The majority of the coffee cherries produced are robusta coffee cherries and grow at an altitude of 400-700 m above sea level with a temperature of 21-24ºC. A wet coffee berry skin peeler is used to separate the coffee fruit skin, the stripping quality results depend on the use of shaft rotation and the gaps of the peelers, and the gaps of the hoppers. Experimental testing method using the Behnken box design method using shaft rotation of 300 rpm, 400 rpm, and 500 rpm, gaps of the peelers 3 mm, 4 mm, and 5 mm, and 5 cm, 7 cm, and 9 cm of hopper gaps. The gaps of the hoppers has the greatest impact on the results of stripping quality with the smallest P-Value of 0.001 and the largest T-Value of -6.66. The best stripping quality results were obtained in the 6th experiment with shaft rotation of 400 rpm, 3 mm gaps of the peelers, and 5 cm hopper spacing with a stripping value of 87.5%. The predicted variant of the shaft rotation factor is 382.828 rpm, the gaps of the peelers is 3 mm, and the gaps of the hoppers is 5 cm. It is predicted that the results of the stripping quality will reach 88.16%

PERANCANGAN MESIN PAN GRANULATOR KAPASITAS 250 KG/JAM Hermawan, Yuni; Sidartawan, Robertus; Syuhri, Ahmad
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 1 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Mesin pembuat pupuk organik granul ini merupakan mesin yang digunakan untukmembuat pupuk berbentuk butiran granul guna mempermudah penyimpanan pupuk dannantinya akan lebih effisien dalam penggunaannya. Proses pembuatan pupuk organikgranul diawali dengan pupuk kandang sebagai bahan pupuk organik yang sudahdikeringkan kemudian dihaluskan. Pupuk kandang yang sudah dihaluskan kemudiandibentuk menjadi butiran granul dengan alat pan granulator. Pupuk kandang yang sudahmenjadi butiran granul kemudian dikeringkan. Mesin pan granulator ini dibuat denganmenggunakan perhitungan daya motor, perhitungan poros, perhitungan sabuk, pengaturansudut, dan kecepatan putar pan granulator. Mesin ini memiliki dimensi 200 cm x 170cm x 200 cm yang cocok untuk kelompok tani yang merupakan mitra petani.Mesin ini mampu mengranulkan pupuk organik 250 kg/jam dengan kapasitas produksi setiaphari 2000 kg untuk 8 jam kerja perhari dan ukuran hasil pengranulan 5 – 7 mm.

ANALISIS VARIASI LUASAN HEATSINK TERHADAP UNJUK KERJA MODUL GENERATOR TERMOELEKTRIK (TEG) MEMANFAATKAN PANAS BUANGAN KONDENSOR KULKAS Wiradika, Yudha; Ilminafik, Nasrul; Junus, Salahuddin; Hardiatama, Intan; Nashrullah, M Dimyati
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Heat energy is generally only used by humans for heating an object and then heat wastefully into the environment without being converted into other energy. This study aims to find out how to utilize waste heat from 6U type refrigerator condensers by using thermoelectric generator modules. This study uses an experimental method that is used to compare the performance of a thermoelectric generator to convert waste heat from a condenser to a variation of 120cm2, 96cm2, and 72cm2 heatsink area. In the study taken every 5 minutes for 2 hours this results in a declining value. The variation of the 120cm2 heatsink area produces a temperature difference of 12.4oC - 9.4oC, the output power is 0.00119 Watts - 0.00072 Watts, and produces an efficiency of 0.014% - 0.011%. In testing the variation of 96cm2 heatsink area, it produces a temperature difference of 8.1oC - 5.3oC, the output power is 0,00055 Watt - 0,00025 Watt, and produces an efficiency of 0,010% - 0,007%. In testing the variation of the 72cm2 heatsink area it produces a temperature difference of 6.9oC - 4.5oC, the output power is 0,00042 Watts - 0,00019 Watts, and produces an efficiency of 0.009% - 0.006%. Of the three variations of the heatsink area that have been tested, the variation of the 120cm2 heatsink area produces the best results compared to other heatsink area variations.

PENGARUH SUDUT DEFLEKSI GEAR TAB ELEVATOR TERHADAP STICK FORCE PILOT PADA PESAWAT N-219 Pribadi, Dicki Hendri; Koekoeh KW, Robertoes; ., Sumarji; Syuhri, Ahmad; Rudi Sugara, Imam
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Indonesia geographically is an archipelagic state that has been recognized by international community according to the PBB law of the sea then was ratified by Indonesia into UUD No.17 of 1985. The number of island in Indonesia currently according to BPS is 17.504 island, that makes Indonesia become the largest archipelagic country in the world and make potentially to have pioneer of aircraft. N-219 Aircraft produced by PT.Dirgantara Indonesia is a pioneer of aircraft that has been developed in Indoensia. Aircraft must meet the flight feasibility criteria to ensure flight safety. One of criteria is the value of a stick force pilot (FE), the force that the pilot receives to control the control surface of an aircraft. Regulation value of the stick force pilot reference is Civil Aviation Safety Regulation (CASR) part 23. The method used in this study is modelling the equations of the motion of the control surface balance tab with the elevator. This study seeks to find the optimum equation to meet the CASR23 regulation where the value of the stick force (FE) is ≤ 75 lbs. The result showed the optimum stick force pilot (FE) value in this modelling is equation III . In critical flight conditions the deflection of the balance tab is not enough to meet the design criteria, trim tab deflection (ẟtrim = 0 – 5˚) is used to reduce stick force pilot value and meets CASR23 regulation. In SLS condition all equation modelling meets the design criteria, where the maximum value stick force pilot (FE) is 51 lbs. keyword : stick force pilot, hinge moment, balance tab, trim tab, elevator.

ANALISIS PENGENDALIAN KUALITAS PRODUK KALENG SARDEN DENGAN MENGGUNAKAN SEVEN TOOLS ., Samsuri; Dwilaksana, Dedi; Sidartawan, Robertus; Darsin, Mahros; Dwi Hidayatul Qoryah, Rika
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Quality control is an activity to rise of quality is expected, through feedback on product characteristics and implementation of improvements if there are deviation. Quality control is used by companies that produce product (manufacturing) as a tool to minimize defective products so they can satisfied the quality is set by the company and satisfy consumers. However, the reality in the field is not expected and many defective products are found that are not in accordance with the standards. This study purposes to determine how the implementation of quality control uses seven tools in an effort to control defective product in the Pacific Harvest company. Droop defects has the greatest contribution in product defects to sardine production, which is a human and machine factor. The factors that caused of product defects are human, machine, material, method and environment. The results of the analysis using the control chart p there are 1 of 16 points above UCL is data 13. Then revisions and recalculated there are found 1 of 15 points above UCL is data 14. Then revisions and improvements of data are carried out until all points are within the boundary control. Problem solving using causal diagrams (fishbone diagram) to identify causes of defects and then provide solutions.

PENGENDALIAN KUALITAS PANEL KOMPOSIT AMPAS KOPI MENGGUNAKAN METODE TAGUCHI Haryanto, Rizal; Triono, Agus; Asrofi, M; Nurdiansyah, Haidzar; Trifiananto, M
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The use of alternative materials such as composites has been widely used in small scale, medium scale and large scale production. Composites can be interpreted as a new type of engineering material consisting of a combination of two or more different types of material. Composite material will have more superior properties than its constituent material. In this study focused on improving the quality of coffee waste composite panels by increasing tensile strength and reducing the failure in panel manufacturing process. Using three parameter variations, namely washing temperature, water content and curing temperature with three levels for each parameter. This combination is replicated 4 times and confirmation experiments are carried out and processed using the taguchi method with L9 orthogonal array with the help of Minitab software. This research was conducted in the Applied Lab, Department of Mechanical Engineering, Faculty of Engineering, University of Jember to obtain data on results and data processing. The results of the study are based on the value of tensile strength. Analysis of the Taguchi method is done using Minitab software. The test results show that the water content has the highest effect on the response parameters of 40.80% at level 1 with a moisture content of 5%, and in the second parameter, the curing temperature is 27.58% at level 3 of 800C, and at the washing temperature at 24.78% at level 3 of 900C.

PENGARUH VARIASI PARAMETER WIRE-CUT EDM MITSUBISHI BA-8 TERHADAP KEKASARAN PERMUKAAN BAJA SKD 61 Putratama, Panji Hastawirata; Jatisukamto, Gaguk; Sakura, Rahma Rei; HT Prasetiyo, Dani; Zainul M, Aris
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Wire-cut EDM is a machining process used to shape precision machine components. The basic principle of wire-cut EDM is the erosion of the workpiece through spark discharges in a dielectric fluid. The spark discharge is caused by a positive electrode approaching the negatively charged workpiece, creating a short circuit that generates heat energy. Previous research was conducted with factors such as current, wire speed, on-time, and variable frequency, resulting in the best surface roughness value of 6 µm. This study aims to determine the effect of parameters such as current, voltage, and wire speed on the response of surface roughness, using the Taguchi method. The workpiece used was SKD 61 steel with 600mm x 50mm x 5mm dimensions. Cutting was done at currents of 4, 6, and 9 (Amperes), voltages of 4, 5, and 6 (Volts), and wire speeds of 8, 10, and 12 (m/m). The results of this study showed the best surface roughness value of 2.540 µm with an S/N ratio of -8.09553 at a current of 4A, voltage of 4V, and wire speed of 8m/m. After optimization, a higher S/N ratio of -8.018 was achieved. Data analysis with ANOVA showed that the effect of factors on the response yielded an F-value greater than the F-table value for all factors, indicating that all factors had a significant impact. The percentage contribution of all factors was as follows: Current at 82.46%, Voltage at 3.36%, and Wire speed at 2.53%. Keywords: wire-cut EDM, taguchi method, surface roughness.

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