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All Journal Jurnal Teknik Mesin Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal Turbo : Jurnal Program Studi Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Justek : Jurnal Sains Dan Teknologi MITRA: Jurnal Pemberdayaan Masyarakat Community Development Journal Otopro Academia Open Indonesian Journal of Cultural and Community Development JTTM: Jurnal Terapan Teknik Mesin Jurnal Abdimas ADPI Sains dan Teknologi PELS (Procedia of Engineering and Life Science) Procedia of Social Sciences and Humanities Innovative Technologica: Methodical Research Journal JTTT Journal Of Engineering Sciences (Improsci) IJHCS Journal of Aerospace Systems and Engineering Innovations
Prantasi Harmi Tjahjanti
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Effective and efficient design and manufacture of a plastic waste press machine Prantasi Harmi Tjahjanti; A'rasy Fahruddin; Agus Hermawanto; Septian Firmansyah
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 2 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i2.627

Abstract

In Madiredo Village, which is located in Pujon District, Malang Regency, there are many business programs. The problem is that these efforts result in a wide range of waste, including up to 5 tons per day of residential waste and other corporate waste. The debris was gathered from the Bengkaras Hamlet, Madirero Village Reduce, Reuse, Recycle (TPST 3R) Integrated debris Management Site. However, a lot of plastic garbage has still leaked out of the packing. The objective is to create a press machine (press) with an electric motor so that packed plastic trash and levers (used when the power goes out) no longer require manual work. The process involves designing and producing waste press machines, particularly for cardboard, plastic trash, and old bottles. Use of the 2016 version of Solidworks for the simulation design. The lowest stress, 2.038 x 104 N/m2, and the highest Von Misses stress, 2.825 x 108 N/m2, are determined by the modeling findings. The biggest displacement or deflection is 1.737 x 10 mm, while the smallest displacement is 0 mm. The values of the strain range from 1.880 x 10-7 to a minimum of 6.00 x 10-4. Safety factor has a value greater than 1 A 1 horsepower AC motor is used in the press machine's construction. Three different distance stopper pressing variables—33 cm, 35 cm, and 37 cm—as well as various types of waste plastic bags, plastic bottles, and cartons/cardboard are used to test the pressing performance. The results show that pressing plastic trash at a distance from the pressing stopper of 37 cm, a mass of 167 kg, a time of 2.2 minutes, and a compressive force of 6546.4 N/m2 may pack or package well for garbage in plastic bags
Furnace Engine Modification to Lower Power Catur Ahadi, Yeyen; Harmi Tjahjanti, Prantasi
Jurnal Improsci Vol 1 No 2 (2023): Vol 1 No 2 October 2023
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v1i2.69

Abstract

Furnace machine or heating furnace is a tool used for heat treatment processes or usually called heat treatment, furnace machines have several types from the beginning found furnace machines, namely induction furnaces/conventional furnaces and then transformed into electric furnaces, electric furnaces are more often used for processes heat treatment because it is cleaner compared to the convection furnace.The furnace machine requires 5000 watts of power, 13.1A. to reach the temperature of 8000 takes 7296 seconds. Furnace machine testing is by quenching using ST-42 steel which is held at 6000 and varying time, the first test material is not treated with heat traetment, for the second test material with a variation of 15 minutes, third 30, fourth 60, fifth 90, sixth 120 minute. the results of the quenching process were tested using the Brinell and Vickers hardness test methods.
Making Composite Materials from Unsaturated Polyester and Coconut Fiber Judging from Mechanical Properties Nurudin, Arif; Harmi Tjahjanti, Prantasi; Setyawan, Anton
Jurnal Improsci Vol 1 No 4 (2024): Vol 1 No 4 February 2024
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v1i4.185

Abstract

Making combined materials that consist of unsaturated polyester and coconut fiber is the target of this research. The samples were tested by tensile and hardness tests before and after warm-up, and obtained by the result was that the trend value of hardness of unsaturated polyester+coconut fiber experienced proportional degradation with the addition of the composition of coconut fiber. The composition of 3% coconut fiber+97% unsaturated polyester has the highest hardness value, reaching 46,7 kg/mm2, and downhill becomes 43,1 kgf/mm2 moment heated at a temperature of 500C for 1 hour. Analog to the tensile test, 3% coconut fiber + 97% unsaturated polyester composition has the highest ultimate tensile strength and yield point. Adding fiber can boost the elasticity modulus, but the warm-up treatment causes the expansion of coconut fiber. The result is that the value of the tensile and hardness of the polyblend will go downhill.
Investigation Study of Semi-Bio Briquettes and Synthesis Briquettes From Used Polymer Waste Plastic Bottles Harmi Tjahjanti, Prantasi; Bamban Jakaria, Ribangun; Febriyan Ikhsanudin, Achmad; Fernanda, Rexy Eca; Akbar, Ali; Fahruddin, A'rasy
Jurnal Improsci Vol 2 No 5 (2025): Vol 2 No 5 April 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/improsci.v2i5.668

Abstract

Up to 2022, Indonesians will produce 69 million tons of waste, of which 12.5 million tons, or 18.2%, will be plastic waste. Since 1995, the number has been growing dramatically. Recycling shredded waste to reduce its volume and enable processing into other materials is one way to manage plastic waste appropriately. This study specifically converted plastic bottle waste into briquettes for used polymer waste. Briquettes are made from recycled plastic bottles used to make polymer waste. There are two types of briquettes made from this waste: Semi-Bio Briquettes, which are made from recycled plastic bottles that have been used to make polymer waste mixed with natural materials like wood sawdust and coconut fiber and adhered with starch, and Synthesis Briquettes, which are made from recycled plastic bottles that have been used to make patchwork or fabric waste and paper waste. The next tests include (1) the Calorific Value Test (Bomb Calorimeter Method), (2) the Proximate Test following SNI 01-6235-2000, which assesses bound carbon, moisture content, ash content, volatile matter content, and other factors, and (3) the Gas/Smoke Emission Test following 2017 RI Minister of Environment and Forestry Regulation Standards. SEM was used to examine the microstructure of synthetic and semi-bio briquettes. While the calorific values for synthetic briquettes did not satisfy the specifications, the results for semi-bio briquettes met the standards. The proximate test results, however, revealed that the two briquettes did not meet the specifications for bound carbon content while meeting the standards for volatile matter content and moisture level. However, only semi-bio briquettes meet the requirements for ash content. The CO, CO2, and HC gas/smoke emission tests all yielded data that complied with the 2017 RI Minister of Environment and Forestry Regulation requirements. Semi-bio briquettes' microstructure observations were less hollow and denser than those of synthetic briquettes.
Development and Analysis of Automatic Controls of Washer and Hand Dryer Equipment Satrio Wicaksono, Alfiansyah; Tjahjanti, Prantasi Harmi
International Journal on Human-Computing Studies Vol. 7 No. 3 (2025): International Journal of Human Computing Studies (IJHCS)
Publisher : Research Parks Publishers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31149/ijhcs.v7i3.5458

Abstract

The results of making and testing hand washing and drying equipment are technological changes and improvements that are useful in everyday life and can even reduce the spread or transmission of viruses. When using hand washing and hand drying equipment, you no longer need to hold/press/squeeze the equipment, you only need to bring your hand closer to the equipment, you can clean your hands in a short time and it is also more practical.
Analisa Manufaktur Kursi Roda Elektrik Untuk Disabilitas Fisik Ditinjau dari Aspek Ergonomi Harmi Tjahjanti, Prantasi; ., Mulyadi; ., Iswanto; Artha Gumelar, Buyung; Rudyansyah Kristiadi, Rakhmad; Prastio, Anggit; Mustakim, Annas
English Vol 3 No 1 (2025): Volume 3 - Nomor 1 - Mei 2025
Publisher : Fakultas Teknik dan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47970/jttt.v3i1.864

Abstract

Angka disabilitas fisik yang tinggi sebagai pemicu dan pemacu dalam pengembangan riset/penelitian bagi penyandang disabilitas untuk membantu aktivitas sehari-hari mereka, salah satunya adalah dengan kursi roda. Ada rasa keprihatinan melihat kursi roda manual yang dipakai sehari-hari para disabilitas fisik, khususnya dengan tangan dan kakinya yang tidak normal, sehingga menjadi masalah sendiri karena mereka cukup kesulitan dan melelahkan dalam mengayuh kursi roda manual. Kondisi tersebut jelas berdampak pada produktivitas kerjanya, sehingga mengurangi pendapatan/perekonomian mereka. Karena itu tujuan penelitian ini adalah manufaktur pembuatan kursi roda elektrik milik dua orang disabilitas fisik (yaitu peserta pertama dan peserta kedua) dan dilakukan uji ergonominya meliputi Kesesuaian anthropometri tubuh pengguna dan dimensi kursi roda, Hasil analisa  postural pengguna dengan RULA (Rapid Upper Limb Assesment), Kesesuaian dimensi kursi roda dengan standar, dan Evaluasi usabilitas kursi roda berdasarkan observasi. Hasil yang diperoleh untuk kursi roda elektrik Peserta pertama adalah dari sisi antropometri, tinggi popliteal lebih panjang dari pada jarak antara dudukan dan pijakan kaki di kursi roda. Agar Peserta pertama lebih nyaman dalam menggunakan kursi rodanya dan kaki tidak menyerong (yang akan berpotensi menyebabkan gangguan musculoskeletal lebih besar), direkomendasikan jarak antara dudukan dan pijakan kaki perlu diperpanjang. Sementara untuk kursi roda elektrik Peserta kedua, secara umum kursi roda Peserta kedua sudah diberikan modifikasi untuk menyesuaikan dengan kebutuhan dan kondisi tubuh Peserta kedua sekaligus membuat desain kursi roda Peserta kedua lebih ergonomis. Namun demikian analisis postural menunjukkan posisi lengan bawah terangkat dan tangan mengalami twisting (menekuk) saat Peserta kedua mengoperasikan kontroler kursi roda elektrik.  Sehingga disarankan untuk menurunkan posisi kontroler sejajar dengan dudukan kursi roda
ANALISIS PENGARUH PERBANDINGAN TIMING INJEKSI MENGGUNAKAN VARIASI BAHAN BAKAR PERTAMAX DAN ETANOL TERHADAP PERFORMA MOTOR MATIC 110CC Bahri, Saiful; Fahruddin, Arasy; Tjahjanti, Prantasi Harmi; Iswanto, Iswanto
Otopro Vol 20 No 2 Mei 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n2.p44-50

Abstract

The application of ethanol as an alternative fuel needs to be continuously studied to face the energy crisis and environmental crisis. This study aims to determine the comparison of injection timing using pertamax and ethanol variations on torque, power, and efficiency in a 110cc automatic motorbike. Testing was carried out experimentally with variations in the percentage of pertamax ethanol mixture of: 15:85, 30:70, 45:55, 60:40, 70:30, and 80:20. Injection timing was modified using ECM software. Torque and power testing used a dynotest tool. The test results showed that power increased by 1.01 kW in the E45 mixture compared to standard timing, with SFC reaching 0.125 kg/kWh.
Air Circulation Improvement through Exhaust and Fan Installation: Peningkatan Sirkulasi Udara Melalui Pemasangan Exhaust dan Kipas Fawwaz , Muhammad Rafly; Tjahjanti, Prantasi Harmi
Procedia of Engineering and Life Science Vol. 8 No. 1 (2025): Proceedings of the 8th Seminar Nasional Sains 2025
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v8i1.1808

Abstract

Technological advances in the transportation sector are currently increasing rapidly, especially in this advanced era. Indonesia has a human population of 273.5 million. It is not surprising that Indonesia is the 15th largest country in the world. There are several options for air circulation in a room, depending on what kind of room you are in. The spaces in the building have a connection between spaces which is called circulation. Circulation is also a movement path which can be said to be a thread or rope which has the aim of connecting spaces within a building and also connecting indoor and outdoor spaces. Circulation also becomes a place for someone to feel a space through that person's origin and destination. In a building, circulation is a positive element that can influence a person's perception of the shape and space in the building.
Pembuatan dan Analisa Kontrol Otomatis Peralatan Cuci dan Pengering Tangan Wicaksono, Alfiansyah; Tjahjanti, Prantasi
Journal of Aerospace Systems and Engineering Innovations Vol. 1 No. 1 (2025): October
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jasei.v1i1.4950

Abstract

Hasil dari pembuatan dan pengujian peralatan pencuci dan pengering tangan merupakan perubahan dan peningkatan teknologi yang bermanfaat dikehidupan sehari-hari dan bahkan dapat mengurangi penyebaran atau penularan virus. Dalam menggunakan peralatan pencuci tangan dan pengering tangan ini sudah tidak perlu lagi untuk memegang /menekan/memencet peralatan tersebut, hanya perlu mendekatkan tangan ke peralatan tersebut kita sudah dapat membersihkan tangan dengan waktu yang dibutuhkan juga cukup singkat dan juga lebih praktis.
Analisa Rancangan Hasil Kursi Roda Elektrik Lipat dan Non Lipat Gumelar, Buyung; Tjahjanti, Prantasi
Journal of Aerospace Systems and Engineering Innovations Vol. 1 No. 1 (2025): October
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jasei.v1i1.4952

Abstract

Kursi roda merupakan peralatan yang berfungsi untuk pasien yang kesulitan berjalan karena yang disebabkan karena sakit, cacat atau cedera. Beberapa seseorang peneliti telah menggunakan teknologi yang awalnya dikembangkan untuk robot bergerak untuk menciptakan kursi roda cerdas, yang mengurangi tuntutan fisik, penglihatan, dan keterampilan yang diperlukan untuk mengoperasikan kursi roda. Kursi roda pintar dirancang untuk memberikan kenyamanan bagi penggunanya. Karena semakin banyaknya desain kursi roda elektrik yang bergantung pada fungsional dan kenyamanan untuk seorang pengguna. Maka diperlukan adanya analisa pada kursi roda elektrik agar kita mengetahui kursi roda tersebut aman tidaknya digunakan, selain itu kita dapat mengetahui terkait kekuatan dari rancangan kursi roda elektrik tersebut.
Co-Authors A'rasy Fahruddin Abdi Chandra Putra Achmad Febriyan Ikhsanudin Adi Prastyo Utomo Agus Hermawanto Ajitiyo Dananjoyo Al Amien, Mochammad Sandi Alfiansyah Satrio Wicaksono Ali Akbar Ali Akbar Anom Isti , As’ad Arasy Fahruddin Arif Nurudin Artha Gumelar, Buyung Arwiyono, Wiky Anjaya Ayeik Abimanyu A’rasy Fahruddin Bachtiar, Rifky Umar Bagas Ariya Dipangga Bahri, Saiful Catur Ahadi, Yeyen Chilmi, Muchammad Darminto Darminto Edi Widodo Edi Widodo, Edi Efendi, Moch Miqdar Eko Panunggal Eko Wahyono Setyawan Ernanda, Rico Ryan Fahruddin, A'rasy Fahruddin, A’rasy Fajar Syahril Kirom Faris Abdullah Fawwaz , Muhammad Rafly Febriyan Ikhsanudin, Achmad Fernanda, Rexy Eca Fuad Hamzah Gumelar, Buyung Hamzah, Fuad Haris Suprastiyo Henry Vian Ivanda Ikhsanudin, Achmad Febriyan Iqbal Hadliri Iswanto -, Iswanto Iswanto . Iswanto Iswanto Iswanto Iswanto Ivanda, Henry Vian Izza Anshory M. Ganu Hersandi Moch Arif Hidayatulloh Mohammad Afif Fajar Mohammad Dani Iswanto Muhammad Amin Putro MULYADI Mulyadi . Mulyadi Mulyadi Mustakim, Annas Mustofa, Wahyu Ali Nurmughni Zulham Amri Prasetiyo, Abdul Aziz Prastio, Anggit Rachmadani, Dhaniar Gumelang Rachmat Firdaus Rahmananto, Satrio Fajar Rexy Eca Fernanda Ribangun Bamban Jakaria Rico Ryan Ernanda Rizki Ardi Arrahman Rudyansyah Kristiadi, Rakhmad Ryan Ernanda, Rico Sarifudin, Mohamad Satrio Wicaksono, Alfiansyah Septian Firmansyah Setyawan, Anton Taufik Afandi Tri Cahyono Waluyo, Satrio Wibowo Harso Nugroho Wicaksono, Alfiansyah Wijaya Kelana Nur Soleh Wijaya Kelana Nur Soleh Wiwik Sumarmi Zyahdo Nikri Jofalo