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OPTIMIZATION OF MACHINERY FIXTURE DESIGN THE MAIN COMPONENTS OF SLING BEARINGS USE A PNEUMATIC SYSTEM fuzi rachmat ramdhan; Faiz Azri; Ghany Heryana; Dianta Mustofa Kamal; Fuad Zainuri; Hady Sofyan
Jurnal Teknologika Vol 13 No 1 (2023): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v13i1.273

Sling bearings are one of the important components in the cable car transportation system. These bearings function to support the weight of the cable car and reduce friction between the train and the rail/sling so that the train can move smoothly and safely. To produce quality sling bearings, a precise and accurate machining process is required. The manufacturing process of ropeway sling bearings goes through a machining process, where raw materials that are usually metals or metal alloys will be cut, shaped, and polished to form the desired bearing shape. Fixture machining is one of the most commonly used techniques in the machining process, where the workpiece is clamped or fastened to a specially designed fixture so that the workpiece remains stable during the machining process. The purpose of this engineering is to produce a fixture design for sling bearing components with increased quantity and quality of products on CNC machines by validating the design through simulation. In this study, tests were conducted using a conventional machining fixture and a machining fixture equipped with a pneumatic system. The test results show that the machining fixture equipped with a pneumatic system is able to increase the production speed and efficiency of cable car sling bearings by up to 20% compared to the conventional fixture. This research makes an important contribution to the cable car sling bearing manufacturing industry in improving production efficiency and final product quality. In addition, this research can also be a reference for further research on the optimization of the cable car sling bearing production process.

RANCANGAN OTOMASI CLAMPING GRIPER PRODUK BODY CALIPER DENGAN PRINSIP 6DOF Herry Patria Hasan; Nana Juhana; Indra Nurwinanto; Ghany Heryana; Dianta Mustofa Kamal
Jurnal Teknologika Vol 13 No 1 (2023): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v13i1.275

PT.XYZ mengalami ketidak balancenya loding vs capacity pada produksi line assy caliper 2 dengan selisi produksi 13 pcs/jam selisi cycle time current terhadap take time adalah sebesar 2.1 detik data ini sesuai dengan laporan produksi line assy caliper 2 , Gap ini terjadi akibat proses clamping griper mesih dilakukan secara manual akibatnya banyak waktu Muda ( sia-sia ) pada proses tersebut. Sering terjadi part terjatuh , part susah dipasang dan dilepaskan sehingga berakibat proses jadi delay selama 2,1 detik laporan ini terlihat pada grafik monitoring problem line produksi assy caliper 2 . Dengan konsep melakukan penelitian dilapangan produksi langsung kemudian menganalisa kareteristik proses produksi diharapkan problem yang terjadi dapat dicarikan solusi untuk menghilangkan waktu MUDA ( Sia-sia ). Dari hasil penelitian ini membuktikan bahwa memodifikasi jig & fixture dengan pendekatan prinsip 6 Degree Of Freedom dapat menghilangkan gap produksi pada line assy calip er 2 sebesar 2,1 dtk atau 13 pcs /jam dengan cara merubah proses produksi manual menjadi Otomasi dan membuat jig & fixture pencekam benda kerja yang peneliti sebut Chuki-chuki Otomation. Hasilnya setelah dirubah system manual ke otomasi dengan menggunakan Chuki-Chuki pencekam proses loading dan unloading caliper di line assy caliper dapat dihilangkan sehinga bisa mengurangi waktu 1,5 dtk waktu loading dan unloading

MODEL PROSES PRODUKSI KEMASAN BERBASIS OFFSET PRINTING Zulkarnain; Novi Purnama Sari; Dianta Mustofa Kamal; Muhammad Asrol
Jurnal Poli-Teknologi Vol. 22 No. 2 (2023)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v22i2.4578

The need for packaging is currently increasing, providing opportunities for the development of the packaging printing industry, especially offset printing-based printing. This study aims to analyze the flow of the production process in the offset printing industry that produces packaging. This study uses a descriptive qualitative method to analyze the running of the production process which consists of pre-print, print, and post-print. The results showed that the results of the packaging printing production process at each stage were strongly influenced by the previous stage.

ANALISIS PENGARUH MEDAN MAGNET TERHADAP UKURAN ATOMISASI BAHAN BAKAR CAMPURAN GASOLINE DAN BIOETANOL Nufus, Tatun Hayatun; Dianta Mustofa Kamal; Gun Gun R Gunadi; Candra Damis Widiawati; Asep Apriana; Muhammad Todaro
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1398

The atomization process plays a very important role because the success or failure of combustion in the combustion chamber is influenced by the size of the liquid fuel mist. The occurrence of good atomization from atomized is determined by the size of the fuel droplets and the size of the nozzle diameter. Reducing the droplet diameter can increase the velocity, which can affect the Reynolds number and cause turbulence effects. The effect of turbulence provides a vortex effect, which enhances the heat transfer process between hot air and fuel particles in the combustion chamber. In this research, the effect of fuel magnetization on droplet size is analyzed. The fuel used is E0, E10, E20, E30, and E100, all types of fuel are channeled through an electromagnetic field of 1500 Gauss. Next, the particle size was tested using a Particle Size Analyzer, Bettersize BeNano 90 Zeta. The result was a decrease in particle size of 8-27%. The particle size measured using the PSA (particle size analysis) tool and theoretical calculations is <10% different. Each tool has an accuracy limit for PSA with a maximum accuracy of around 5%. These results provide initial information that the fuel magnetization process can improve engine performance.

Implementasi Merdeka Belajar dalam Peningkatan Literasi dan Numerasi Siswa Shobri, Ach.; Masrukin; Sabri; Dianta Mustofa Kamal
Indo-MathEdu Intellectuals Journal Vol. 4 No. 3 (2023): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v4i3.1568

This study evaluates the effectiveness of the "Merdeka Belajar" program launched by the Indonesian Ministry of Education and Culture in improving students' literacy and numeracy. A quantitative method with a quasi-experimental design was used to compare literacy and numeracy scores before and after program implementation in 10 senior high schools in East Java Province, with a total of 100 students as samples. The results showed significant improvements in literacy scores from 62.5 to 75.3 and numeracy scores from 58.7 to 72.1, with a p-value <0.01. Success factors included teachers' freedom in choosing teaching methods, principals' support and parents' involvement. However, challenges such as resource inequality between urban and rural schools and resistance to change remain. Recommendations for education policy include improving access and quality of education resources as well as continuous training for teachers and principals to ensure the sustainability and success of this program

Penggunaan Pestisida dalam Pertanian: Resiko Kesehatan dan Alternatif Ramah Lingkungan: Pesticide Use in Agriculture: Health Risks and Environmentally Friendly Alternatives Fitriah Suryani Jamin; Dianta Mustofa Kamal; Restu Auliani; Mustar Rusli; Susatyo Adhi Pramono
Jurnal Kolaboratif Sains Vol. 7 No. 11: November 2024
Publisher : Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/jks.v7i11.6342

Penggunaan pestisida dalam pertanian merupakan praktik umum yang meningkatkan hasil panen, namun berpotensi menimbulkan masalah serius terhadap kesehatan manusia dan lingkungan. Penelitian ini bertujuan untuk mengeksplorasi dampak penggunaan pestisida, termasuk risiko kesehatan yang dihadapi petani dan masyarakat, serta pencemaran lingkungan yang ditimbulkannya. Penelitian ini menganalisis berbagai sumber data terkait dampak pestisida dengan menggunakan metode studi literatur, seperti gangguan kesehatan akut dan kronis serta penurunan keanekaragaman hayati. Hasil analisis menunjukkan bahwa meskipun pestisida kimiawi dapat meningkatkan produksi pertanian, penggunaan yang tidak terkelola dengan baik dapat menyebabkan keracunan, pencemaran air, tanah, dan udara, serta degradasi ekosistem. Penelitian ini menyarankan alternatif penerapan metode pengendalian hama terpadu (PHT) dan penggunaan bio-pestisida yang lebih ramah lingkungan. Hasil studi ini diharapkan dapat memberikan wawasan bagi kebijakan pertanian berkelanjutan dan meningkatkan kesadaran akan risiko kesehatan serta lingkungan dari penggunaan pestisida di Indonesia.

Pelatihan Pengoperasian dan Perawatan Mesin Pencacah bagi Komunitas Ciliwung Depok (KCD) sebagai Solusi Pengolahan Limbah Bambu Sungai Ciliwung Syuriadi, Adi; Gun Gun Ramdlan Gunadi; Dianta Mustofa Kamal; Ahmad Bustomi; Andy Permana Rusdja; Muhamad Hanhan Nugraha
Mitra Akademia: Jurnal Pengabdian Masyarakat Vol 8 No 1 (2025): Mitra Akademia: Jurnal Pengabdian Masyarakat
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/mapnj.v8i1.7205

The problem of biomass waste, especially bamboo along the Ciliwung River, can pose significant environmental risks. Some ways to convert bamboo waste are making straw mushrooms or converting it into fuel through pyrolysis technology. Before being converted, this bamboo waste must be ground by chopping it in a chopper. This community service aims to improve the skills of participants from the Ciliwung Depok Community (KCD) regarding training in the operation and maintenance of waste shredder machines with a direct demonstration method and a grant of waste shredder equipment. The training was carried out for one day with 20 participants from KCD. Activities include delivering theories including socialization about biomass waste (garbage), waste sorting, management of its processing, then demonstration of tools/direct practice, and evaluation through pre-test and post-test. Data were analyzed using the Paired Two Sample for Means method. The training showed a significant increase in participants' knowledge and skills as evidenced by the difference in average pre-test and post-test scores which were statistically significant (p-value <0.05). The results showed that the training had a very big impact on the participants' abilities before and after the training. Similar programs are expected to be implemented in other communities to increase environmental awareness and the use of environmentally friendly technology. Keywords - Ciliwung, bamboo waste, chopper machine, training Abstrak Sampah adalah suatu bahan yang terbuang atau dibuang dari sumber hasil aktifitas manusia maupun alam yang belum memiliki nilai ekonomis. Pembuangan sampah yang tidak diurus dengan baik, akan mengakibatkan masalah besar. Demikian juga pembakaran sampah akan mengakibatkan pencemaran udara. Pembuangan sampah ke sungai (Ciliwung) akan mengakibatkan pencemaran air, tersumbatnya saluran air dan banjir. Dari permasalahan di atas, maka diperlukan sistem pengolahan sampah yang baik agar tidak terjadi kerusakan lingkungan dan juga diharapkan ada peningkatan ekonomi dari hasil pengolahan sampah tersebut. Tujuan dari kegiatan ini adalah memberikan pelatihan pengolahan sampah, terutama sampah dari bambu yang banyak dijumpai di aliran sungai Ciliwung. Pelatihan mencakup sosialisasi tentang biomassa/limbah biomassa (sampah), pemilahan sampah, manajemen pengolahannya dan pelatihan penggunaan alat pencacah sampah dengan metode demonstrasi langsung dan hibah alat pencacah sampah. Hasil dari kegiatan ini menunjukkan peningkatan pengetahuan masyarakat Komunitas Ciliwung Depok (KCD) tentang limbah biomassa, dalam mengolah limbah biomassa terutama bambu menjadi bio-pelet yang dapat digunakan sebagai bahan bakar. Penjualan bio-pelet ini diharapakan dapat meningkatkan perekonomian juga bagi masyarakat KCD. Kata kunci - Ciliwung, limbah bambu, mesin pencacah, pelatihan

Pengembangan Model Pembangkit Listrik Tenaga Picohydro Tipe Turbin Cross Flow Head Rendah Gun Gun R Gunadi; Jusafwar; Candra Damis Widiawaty; Machfud Priyo Utomo; Ramdana Ajie Satria; Muhammad Raihan Abimanyu; Adi Syuriadi; Dianta Mustofa Kamal; Rosidi
Infotekmesin Vol 13 No 2 (2022): Infotekmesin: Juli, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i2.1527

The provision of food, energy supply, and the provision of information are The food provision, energy supply, and information delivery are controlled to improve people's welfare. In 2011, the national electricity production by PLN was 11% new and renewable energy. 6% hydropower and 5% geothermal. PLN plans the geothermal to be 13% and hydropower to be 6%. The availability of independent PhPP has been built by many communities. PhPP with a waterwheel drive provides a capacity of about 100 watts thus it is only enough for home lighting, whereas the hydro energy potential of the area is quite abundant. The development that has been carried out has several weaknesses; PhPP plump turbine type requires a high head which becomes a constraint for agricultural irrigation, in the other hand PhPP waterwheel type has low efficiency. The research was conducted to develop PhPP low head cross-flow turbine type, which is more efficient. The development begins with the experiment of the PhPP cross-flow turbine model to optimize the ratio of the diameter and width of the runner. A preliminary case study provides experimental results for a cross-flow turbine's torque and power parameters at a flow rate of 0.053 m3/s. Changes in the turbine diameter and width ratio are optimum at a runner width of 10 cm.

The Effect of Corn Husk Waste Addition in Paper Production on Surface Texture and Printability Dianta Mustofa Kamal; Nadiah Tsabitah; Nayla Nazneen
Multicore International Journal of Multidisciplinary (MIJM) Vol. 1 No. 2 (2025): November
Publisher : Marasofi International Media and Publishing (MIMP)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64123/mijm.v1.i2.5

Indonesia, as an agrarian country with abundant corn production, generates a significant volume of corn husk waste. This study aims to evaluate the effect of corn husk waste addition on the physical characteristics of recycled paper, particularly surface texture and print quality. Corn husk waste was selected due to its high cellulose content and wide availability in Indonesia. The papermaking process involved delignification using NaOH, bleaching with H₂O₂, and blending recycled paper pulp with corn husk fibers. The test results show that corn husk fibers increase paper thickness and tensile strength, while providing a rougher but still functional surface texture. Printing tests indicated that ink absorption remained adequate, although minor spreading was observed in rougher areas. Overall, the resulting paper has potential as an eco-friendly alternative for simple applications such as handicrafts and non-commercial printing.

ANALISIS PENGARUH MEDAN MAGNET TERHADAP UKURAN ATOMISASI BAHAN BAKAR CAMPURAN GASOLINE DAN BIOETANOL Nufus, Tatun Hayatun; Dianta Mustofa Kamal; Gun Gun R Gunadi; Candra Damis Widiawati; Asep Apriana; Muhammad Todaro
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1398

The atomization process plays a very important role because the success or failure of combustion in the combustion chamber is influenced by the size of the liquid fuel mist. The occurrence of good atomization from atomized is determined by the size of the fuel droplets and the size of the nozzle diameter. Reducing the droplet diameter can increase the velocity, which can affect the Reynolds number and cause turbulence effects. The effect of turbulence provides a vortex effect, which enhances the heat transfer process between hot air and fuel particles in the combustion chamber. In this research, the effect of fuel magnetization on droplet size is analyzed. The fuel used is E0, E10, E20, E30, and E100, all types of fuel are channeled through an electromagnetic field of 1500 Gauss. Next, the particle size was tested using a Particle Size Analyzer, Bettersize BeNano 90 Zeta. The result was a decrease in particle size of 8-27%. The particle size measured using the PSA (particle size analysis) tool and theoretical calculations is <10% different. Each tool has an accuracy limit for PSA with a maximum accuracy of around 5%. These results provide initial information that the fuel magnetization process can improve engine performance.

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