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All Journal Jurnal Teknik Mesin JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Infotekmesin Jurnal Surya Teknika Abdi Masya Jurnal Patria Bahari Teknika Jurnal Suara Pengabdian 45 Cakrawala: Jurnal Pengabdian Masyarakat Global Politeknosain Simpati: Jurnal Penelitian Pendidikan dan Bahasa Jurnal Polimesin Manufaktur: Publikasi Sub Rumpun Ilmu Keteknikan Industri Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer Panggung Kebaikan : Jurnal Pengabdian Sosial Jurnal Pendidikan Teknik Mesin Jurnal Pendidikan Teknik Mesin
Priyanto, Kaleb
Universitas Negeri Semarang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Transportation Other

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Peningkatan Keterampilan dan Produksi Pakan Berbasis Silase bagi Peternak Sapi di Kecamatan Musuk Gojandra, Farda Pega Libra; Priyanto, Kaleb; Cahyanto, Septian Eko; Saputra, Dimas Chandra; Wibowo, Andika Agus Tri; Rahmawati, Adinuringtyas Herfi; Sarai Enita
Jurnal Suara Pengabdian 45 Vol. 4 No. 3 (2025): September: Jurnal Suara Pengabdian 45
Publisher : LPPM Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/pwg4y651

Abstract

Program pengabdian kepada masyarakat ini bertujuan untuk meningkatkan keterampilan dan kapasitas peternak sapi di Kecamatan Musuk, Boyolali, melalui penerapan teknologi pencacah hijauan dan teknik fermentasi silase. Program dilaksanakan dengan pendekatan partisipatif yang melibatkan 15 peternak anggota Slamet Jaya Farm selama delapan bulan. Kegiatan meliputi perancangan dan pembuatan mesin pencacah sederhana, pelatihan teknis, demonstrasi praktik pembuatan silase, serta pendampingan berkelanjutan. Mesin pencacah yang dirancang menggunakan motor 1 HP dengan kapasitas 200 kg/jam terbukti mampu menurunkan waktu pengolahan dan menghasilkan ukuran cacahan hijauan seragam 2–5 cm. Hasil program menunjukkan bahwa 82% peserta berhasil mengoperasikan mesin dan memproduksi silase berkualitas dengan pH optimal 3,8–4,2, sedangkan 71% mulai memanfaatkan limbah pertanian sebagai bahan baku silase. Program ini membuktikan bahwa teknologi tepat guna yang dikombinasikan dengan pelatihan intensif mampu meningkatkan pengelolaan pakan dan mendukung keberlanjutan usaha peternakan sapi lokal.
Peningkatan Kesejahteraan UKM Mulyo Waras melalui Pelatihan Pembuatan Pakan Domba dengan Mesin Pencacah Semi-Otomatis: Improving The Welfare Of UKM Mulyo Waras By Training In Making Sheep Feed Using A Semi-Automatic Chopper Machine Karminto, Karminto; Priyanto, Kaleb; Heru Palmiyanto, Martinus; Hari Priyambodo, Bambang; Suhartoyo, Suhartoyo; Tritmoko, Nugroho
Jurnal Suara Pengabdian 45 Vol. 2 No. 2 (2023): Juni: Jurnal Suara Pengabdian 45
Publisher : LPPM Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/pengabdian45.v2i2.762

Abstract

Wonogiri Regency, Central Java, is famous for its large number of residents who work as breeders, especially sheep/goat breeders. The feed for goats/sheep breeders in Wonogiri district is sourced from weeds. However, the enumeration was still done manually using a sickle, so the enumeration process was ineffective because it required more time and effort. Through this community service scheme, the process of making a machine for chopping weeds is carried out which will later be used as fodder for goats/sheep, especially in the Wonogiri area. The machine is driven by an electric motor and there is a chopping knife which is designed to be more effective. The results of this community service program show that the increase in sheep feed production increased from 200 kg/day before using the machine to 350 kg/day or an increase of up to 75% when compared to without the chopping machine.
Desain Pisau Pengurai dan Sistem Pengayak serta Uji Produk Mesin Pengolah Sabut Kelapa sebagai Bahan Mentah Komposit Tarigan, Roy Aries Permana; Priyanto, Kaleb; Sodikin, Jenal; Pratama, M R; Ramadhani, I R
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2097

Abstract

This research aims to design a decomposing blade, sieving system, and test machine products. The method for completing coconut fiber processing machines consists of three stages, namely the design and production process stages, as well as machine product testing. This research produces the following data, namely the design of the untangling knife which is a combination of the functions of the coir untangling knife for random and woven results. Calculation of the equilibrium moment on the shaft obtained a value of 𝑅𝑉𝐵 is 28.68 N and the reaction at point A was 𝑅𝑉𝐴 is 28.32 N, with the diameter of the shaft used in the coconut fiber sieving machine transmission system being Ø28 mm. Fiber uniformity is obtained from twice decomposition processes, whereas the level of fiber/powder uniformity is influenced by the long sieving process time and also the high rotational speed of the sieve.
PERBANDINGAN SIFAT IMPAK DAN KETAHANAN API KOMPOSIT BERPENGUAT SERAT ALAM DENGAN FILLER BENTONITE CLAY Kaleb Priyanto; Andika Wibowo; Roy Tarigan; Ridwan Afandi
Jurnal Pendidikan Teknik Mesin Vol. 12 No. 2 (2025): Jurnal Pendidikan Teknik Mesin
Publisher : Program Studi Pendidikan Teknik Mesin Fakultas Keguruan dan Ilmu Pendidikan Universitas Sriwiajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jptm.v12i2.81

Abstract

This research presents a comparative study on the impact strength and combustion resistance of polyester matrix composites reinforced with natural fibers and bentonite filler. Two types of natural fibers—pineapple leaf fiber and sansevieria fiber—were used as reinforcement, with 5% bentonite added as filler in each composite variation. Impact testing was conducted in accordance with ASTM D-4812-99, while combustion resistance was evaluated based on ASTM D-635. The results indicate that the composite reinforced with pineapple leaf fiber exhibited higher impact strength than that reinforced with sansevieria fiber, with the highest value recorded at 0.79 J/mm² for the N50B5 variation. The addition of up to 5% bentonite significantly enhanced both impact strength and combustion resistance. The S50B5 variation showed the best fire resistance performance, with a Time to Ignition (TTI) of 10.87 seconds and a Rate of Burning (ROB) of 11.63 mm/min. This improvement in combustion resistance is attributed to bentonite’s role as a filler that reduces oxygen penetration by filling gaps within the matrix and forming a protective barrier against heat. Thus, the addition of bentonite up to 5% can improve the mechanical properties and thermal resistance of polyester-based composites, and make them superior for applications that require fire and impact resistance.
EVALUASI KOLEKTIF KESELAMATAN LIFTING INDONESIA: PENYEBAB KECELAKAAN DAN EFEKTIVITAS PENGENDALIAN RISIKO DI INDUSTRI Tunggul Ulung Adi Kusumo; Muhammad Tegar Miftakhlana; Muhammad Isnaini Nuur Rohman; Afix Zulfikri; Muhammad Naufal Syaikhany; Kaleb Priyanto
JPB : Jurnal Patria Bahari Vol. 6 No. 1 (2026): JPB: MEI 2026
Publisher : PPPM POLTEKPEL SORONG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54017/jpb.v6i1.236

Abstract

Operasi pengangkatan beban (lifting) merupakan aktivitas dengan profil risiko tinggi yang mendominasi statistik kecelakaan kerja di sektor manufaktur dan industri berat Indonesia. Penelitian ini bertujuan untuk mensintesis berbagai temuan mengenai penyebab kecelakaan dan efektivitas pengendalian risiko guna menyusun peta jalan evaluasi kolektif yang adaptif bagi industri nasional. Penelitian dilakukan menggunakan metode Systematic Literature Review (SLR) dengan prosedur PRISMA melalui pencarian literatur komprehensif pada basis data SINTA, Garuda, dan Google Scholar untuk periode 2021-2025. Data dianalisis melalui teknik meta-synthesis dengan pengkodean tematik untuk mengevaluasi karakteristik operasional, pola kegagalan, dan langkah mitigasi dari studi-studi terpilih. Hasil penelitian mengungkapkan bahwa faktor manusia mendominasi penyebab kecelakaan lifting (>90%), terutama akibat kurangnya pelatihan, operator tidak bersertifikat, serta fenomena normalisasi penyimpangan prosedur. Analisis teknis menunjukkan bahwa komponen wire rope memiliki nilai Risk Priority Number (RPN) tertinggi, sementara integrasi metode FMEA dan HAZOP terbukti paling efektif dalam menurunkan potensi kegagalan sistematis secara terukur. Selain itu, ditemukan bahwa profil risiko bersifat spesifik sektoral sehingga memerlukan pendekatan manajemen risiko yang adaptif terhadap kondisi lokal masing-masing klaster industri. Evaluasi kolektif ini menyimpulkan bahwa pengendalian risiko yang optimal harus menggabungkan kekuatan teknis instrumen analisis dengan penguatan budaya keselamatan serta kompetensi operator sebagai lini pertahanan terakhir. Implementasi SMK3 yang konsisten dan berbasis bukti menjadi prasyarat mutlak untuk mencapai lingkungan kerja nihil kecelakaan di industri Indonesia.
Characterization of HDPE Waste-Bentonite Clay-Jute Fiber Composite Materials: Impact Strength and Density Analysis Thoriq Bintang Fadillah; Kriswanto; Kaleb Priyanto; Immanuel Eltian Sudjana
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15732

Abstract

This study evaluates composite materials' impact strength and density from recycled high-density polyethylene (HDPE) waste reinforced with woven jute fibers and filled with bentonite clay at varying volume fractions (2%, 4%, 6%, and 8%). The composites were fabricated using a hot press molding technique. Density was measured following ASTM D792, while impact strength was assessed using the unnotched Charpy method based on ISO 179. Results showed that increasing bentonite content raised the composite's density due to the higher specific gravity of the clay. Impact strength exhibited a non-linear behavior, peaking at 4% bentonite with a 13.5% increase compared to the 2% variant. However, further increases in clay content led to a significant drop in impact strength, primarily due to filler agglomeration and reduced matrix-fiber interfacial bonding, which resulted in brittle fracture modes. Macro-photographic analysis of fracture surfaces confirmed this trend, revealing ductile failure, fiber pullout at low clay contents, and sharp, brittle fractures at higher contents. These findings highlight the importance of optimizing filler content to balance density and mechanical performance, offering insights for developing sustainable composite materials for structural and industrial applications. Keywords: recycled HDPE, natural fiber composite, bentonite clay, impact strength, density
Primary School English Teachers' Knowledge and Classroom Implementation of Oral Reading Fluency Instruction: A Mixed-Methods Study Martha Budianto; Sarai Enita; Kaleb Priyanto
Simpati Vol. 4 No. 2 (2026): April : Jurnal Penelitian Pendidikan dan Bahasa
Publisher : CV. Alim's Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59024/simpati.v4i2.2247

Abstract

Oral reading fluency is a critical component of early literacy because it bridges decoding and reading comprehension. Despite its importance, fluency instruction remains one of the least emphasized aspects of early English reading instruction, particularly in English as a Foreign Language (EFL) primary classrooms. This study examined primary school English teachers' knowledge of oral reading fluency instruction and the factors influencing its classroom implementation. A convergent mixed-methods design was employed involving 20 English teachers from three purposively selected primary schools. Data were collected through structured classroom observations and semi-structured interviews. Observation data were analyzed using descriptive statistics, while interview data were analyzed thematically and integrated with the quantitative findings. The findings revealed that teachers possessed only partial knowledge of oral reading fluency, demonstrating stronger understanding of teacher modeling and reading rate than guided oral reading and prosody instruction. Classroom observations similarly showed limited implementation of evidence-based fluency strategies. Teachers identified insufficient pre-service preparation, limited professional development, large class sizes, and inadequate instructional resources as major barriers to effective fluency instruction. These findings highlight the need for stronger teacher preparation and professional development to support comprehensive oral reading fluency instruction in early English literacy classrooms.
Taguchi-based optimization of CNC turning parameters to enhance surface finish of AISI 1045 steel Kriswanto Kriswanto; Oktova Yusuf Briantoro; Rizqi Fitri Naryanto; Kaleb Priyanto; Jamari Jamari; Andri Setiyawan
Jurnal Polimesin Vol 23, No 6 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i6.7107

Abstract

Surface roughness is a critical indicator of machining quality, directly affecting the functional performance and service life of manufactured components. This study aims to optimize the surface roughness of AISI 1045 steel by varying parameters (cutting speed, feed rate, and depth of cut) using Taguchi L9 orthogonal array. Experiments were conducted on a FANUC 0i-Mate CNC lathe using Al-TiN-coated VNMG inserts. Moreover, the surface roughness was measured in accordance with ISO standards. Analysis of Variance (ANOVA) revealed the depth of cut was the most influential factor (45.21%), followed by cutting speed and feed rate. The Signal-to-Noise (S/N) ratio was identified as optimal surface roughness of 0.323 µm (N5 grade) at the parameter, with a cutting speed of 240 mm/min, a feed rate of 0.2 mm/rev, and a depth of cut of 0.6 mm. The novelty of this study is the demonstration that Taguchi's design and ANOVA combined can achieve reliable optimization results with considerably reduced experimental effort and offer practical industrial deployment, including for Small and Medium-sized Enterprises (SMEs). 
Design and Implementation of a 3-Phase Induction Motor Controller Simulator Using Programmable Logic Controller (PLC) and Human Machine Interface (HMI) Integration Kaleb Priyanto; Immanuel Eltian Sudjana; Hans Nashirudin Almay; Kriswanto; Haikal; Sarai Enita
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.2750

Abstract

This study was conducted as a response to the limited availability of practical learning tools in industrial automation education and training. In this research, a three-phase induction motor control simulator was designed and developed by integrating a Programmable Logic Controller (PLC) and Human Machine Interface (HMI) system. The main objective is to enhance learners' understanding and practical skills in designing and operating industrial control and automation systems through an interactive learning approach. The development process involved designing the system architecture using an Omron CP2E PLC and NB-series HMI, electrical integration, ladder diagram programming, and user interface development. The simulator was then tested to ensure its proper functionality and effectiveness in supporting the learning process. The results demonstrate successful system integration, reliable control logic, and an intuitive user interface via the HMI. This research contributes a structured and cost-effective educational tool that is well-suited for automation engineering and technical training programs.
CHARACTERISTICS OF HARDNESS AND MICROSTRUCTURE OF RECYCLED PISTONS MANUFACTURED BY SAND CASTING PROCESS Bambang Hari Priyambodo; Handoko; Felixtianus Eko Wismo Winarto; Amida Tri Andani; Martinus Heru Palmiyanto; Kaleb Priyanto
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 2 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i2.86156

Abstract

Motorcycle piston waste, made from aluminum, is often poorly managed despite its advantages in corrosion resistance and thermal conductivity. This study aims to enhance the economic value of piston waste through recycling using the sand casting method. The melting process was conducted at a temperature of 843°C, followed by casting into sand molds. The recycled product is intended for use as a ship propeller component. Tests performed included Vickers hardness testing and microstructural analysis to evaluate the mechanical properties and material characteristics. The results showed that the recycled material exhibited an average hardness of 77.2 kg/mm², consistent with standard aluminum hardness. Microstructural analysis revealed the presence of porosity which may affect mechanical strength; however, this porosity did not reduce the material's resistance to mechanical damage and provided good toughness. Based on these findings, it can be concluded that motorcycle piston waste recycled by sand casting at 843 °C has potential for use in manufacturing high-value components such as ship propellers, considering the hardness quality and microstructural characteristics of the material.
Co-Authors Afif, Dany Faishal Afix Zulfikri Amida Tri Andani Andika Wibowo Andri Setiyawan Ardiyanto, Farit Arif Hidayat Purwono Arraffi, Femas Athanasius Priharyoto Bayuseno Atmoko, Nugroho Tri Bambang Hari Priyambodo Bambang Hari Priyambodo Bambang Hari Priyambodo Bambang Hari Priyambodo Bambang Margono Cahyanto, Septian Eko Daniel Agung Cristanto Deslana Avinda Krisna Putra Dio Agusta P Edi Cahyono Enita, Sarai Fadhil Putra Ramadhan Felixtianus Eko Wismo Winarto Gojandra, Farda Pega Libra Haikal Haikal Haikal Haikal Handoko Haniel, Haniel Hans Nashirudin Almay Hari Priyambodo, Bambang Hibban Pasya Hafid I R Ramadhani Immanuel Eltian Sudjana J. Jamari Jamari Jamari Jasmine, Khulud Nur Jenal Sodikin Julivan Brian Womsiwor Karminto Karminto Karminto, Karminto Khoirul Huda Krisna Saka Aji Pangestu Kriswanto Kriswanto Kriswanto Lilik Dwi Styana Lujeng Widodo, Lujeng M R Pratama Martha Budianto Martinus Heru Palmiyanto Martinus Heru Palmiyanto Moch. Chamim Muhammad Emir Al Hakim Muhammad Isnaini Nuur Rohman Muhammad Naufal Syaikhany Muhammad Tegar Miftakhlana Muhammad Zakky Mubarok Ninda Kurniadi Nur Hidayah, Fatimah Oktova Yusuf Briantoro Petrus Heru Sudargo Pratama, M R Priyana, Onny Andre Purnama, Satria Candra Putra, Fajar Waskhita Putri, Talita Andina Rahmat Rahmat Doni Widodo Rahmawati, Adinuringtyas Herfi Rajendra Vian Pradiksa Ramadhani, I R Rauuf Nur Fattah Ridwan Afandi Rizqi Fitri Naryanto Roy Aries Permana Tarigan Roy Tarigan Ruben Bayu Kristiawan Rusiyanto Rusiyanto Saputra, Dimas Chandra Sarai Enita Sarai Enita Setyo Bhahak Fendi Baihaqi Sodikin, Jenal Suhartoyo Suhartoyo Suhartoyo Suhartoyo, Suhartoyo Tarigan, Roy Aries Permana Thoriq Bintang Fadillah Tritmoko, Nugroho Tunggul Ulung Adi Kusumo Wibisono, Gilang Wibowo, Andika Agus Tri Yudistira Rijal Andika