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All Journal Rekayasa Mesin JURNAL INTEGRASI Jurnal Teknologi dan Riset Terapan (JATRA) Journal of Engineering and Applied Technology Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Journal of Applied Mechanical Technology (JAMET) Jurnal Pendidikan Teknik Mesin
Nur Fitria Pujo Leksonowati
Politeknik Negeri Batam
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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ANALISA PERBANDINGAN KEMAMPUAN KARBON AKTIF SEKAM PADI DAN KARBON AKTIF BATOK KELAPA DALAM ALAT FILTRASI AIR Gunawan, Leo Van; Farhan, Ahmad; Rohmat, Abdul; Pujo Leksonowati, Nur Fitria; Purba, Adi Syahputra
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 7 No. 1 (2025): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v7i1.9327

Abstract

Dalam instalasi alat filtrasi air terdapat tiga jenis material yang umum dipakai sebagai media filtrasi yaitu Zeolit, Silika dan Karbon. Karbon aktif dapat dibuat menggunakan arang dari limbah hasil pertanian. Di Indonesia limbah sekam padi kebanyakan hanya di bakar atau diolah untuk tambahan pakan ternak. Batok kelapa kebanyakan digunakan untuk bahan untuk produksi briket. Penelitian ini dilakukan untuk membandingkan kemampuan karbon dari limbah sekam padi dan batok kelapa dalam meningkatkan kinerja alat filrasi air saat menyaring zat pencemar. Langkah-langkah dalam pembuatan karbon aktif dari limbah sekam padi dan batok kelapa ini yaitu melakukan proses pretreatment, proses dehidrasi, proses karbonisasi, proses pengaktifan secara fisika dan kimia. Kualitas air dilakukan pengujian menggunakan metode fisika dan kimia dengan mengacu standar kualitas air dari PP Republik Indonesia No 22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup. Hasil pengujian menunjukan air yang dihasilkan dari alat filtrasi menggunakan karbon aktif sekam padi berada pada baku mutu kelas 1 sedangkan air yang dihasilkan dari alat filtrasi menggunakan karbon aktif batok kelapa berada pada baku mutu kelas 2. Hal ini menunjukan penggunaan karbon aktif dari sekam padi dapat meningkatkan kinerja alat filrasi air dalam menyaring zat pencemar apabila dibandingkan dengan penggunaan karbon aktif dari batok kelapa.
Pengaruh Proses Tacking dan Welding Sequence Terhadap Distorsi Pada Pengelasan Butt Joint Pipa Dengan Flange Berbahan Carbon Steel Pamungkas, Nurman; Leksonowati, Nur Fitria Pujo; Mufariz, Mufti Fathonah; Hakim, Rahman; Baharudin, Budi; Dzulfiqar, Mohamad Alif; Saputra, Ihsan; Aryswan, Adhe; Reynaldi, Muhammad Ryan
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 5 No. 2 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i2.6893

Abstract

This research explores the issue of distortion in spool pipes within the context of the fabrication process, with a specific focus on pipe connections with flanges. The main objective of this study is to investigate the impact of distortion caused by the tacking process during fit-up and the sequence of welding sequences in the welding process. The experiments were conducted by collecting data through inspections of concentricity in the connections using the Total Station Sokkia CX 101 S/N GP1159 tool, with tolerances set at 1, and 0.75 for capping weld. Fabrication Piping and Structure Onshore served as the testing location, with ASTM A671 CC60-12 as the testing material. All tests were conducted at room temperature. The inspection results were used as a guide for the repair process, providing instructions to the Fitter for improving the connections and enabling the welder to maintain the precision of the pipe connections with flanges to avoid distortion. Based on the experimental results, the concentricity of pipe connections reflects the occurring distortion, while welding sequences show a counter effect at each welding step. The distortion after welding, measured at 0.75, still complies with client specifications.
STUDI KERUSAKAN MESIN WHEEL LOADER LIUGONG ZL50CN MENGGUNAKAN FMEA DAN DIAGRAM FISHBONE Kamsyah, Domi; Ramadhani , Hasan Fajriansyah; Leksonowati, Nur Fitria Pujo; Wivanius, Nadhrah
Jurnal Pendidikan Teknik Mesin Vol. 12 No. 1 (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.v12i1.77

Abstract

Power system merupakan sistem yang memberikan tenaga agar wheel loader dapat beroperasi dan merupakan sumber penggerak utama bagi sistem atau komponen lainnya. Kegagalan fungsi pada power system mengganggu kerja sistem lain yang dapat berdampak kepada penurunan produktivitas, downtime, dan biaya perbaikan yang tinggi. Penelitian ini dilakukan untuk mencari tahu penyebab kegagalan power system dari wheel loader Liugong ZL50CN, dengan cara mengidentifikasi kemungkinan kegagalan dengan menggunakan metode FMEA dan dilanjutkan menggunakan diagram fishbone untuk melihat penyebab kegagalan. Hasil analis menunjukkan bahwa penyebab utama penyebab kerusakan pada mesin wheel loader ZL50CN dalam kurun waktu Januari 2021 sampai Desember 2023 adalah kerusakan sistem pendingin mesin. Hasil FMEA membuktikan bahwa modus kegagalan kerusakan sistem pendingin mesin memiliki nilai RPN tertinggi yaitu sebesar 243. Digram fishbone merinci penyebab apa saja yang membuat modus kegagalan kerusakan sistem pendingin mesin yang terdiri dari 4 faktor utama yaitu mechine, material, man, dan metode. Kata kunci: FMEA, Digram fishbone, RPN
​​Pengaruh G96 dan G97 terhadap Kekasaran Permukaan ST 37 dan S45C pada Pembubutan CNC​ pujo leksonowati, nur fitria; Pamungkas, Nurman; Baharudin, Budi; Cahyagi, Danang; Van Gunawan, Leo; Adimas, Adimas
Journal of Applied Mechanical Technology Vol 4 No 1 (2025): JOURNAL OF APPLIED MECHANICAL TECHNOLOGY (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v4i1.308

Abstract

ABSTRACT – This study aims to compare the effects of Constant Cutting Speed (G96) and Constant Spindle Speed (G97) modes on the surface roughness of ST 37 and S45C materials in step-turning processes using a CNC lathe. A comparative experimental method was employed, measuring surface roughness (( R_a )) at stepped diameters (16 mm, 24 mm, 32 mm, and 35 mm) with a Mitutoyo Surface Tester SJ-210. Results indicate that G96 mode produces lower surface roughness, with average ( R_a ) values of 2.22 µm (S45C) and 2.27 µm (ST 37) in the N6 class, compared to G97 mode with ( R_a ) values of 3.08 µm (S45C) and 3.03 µm (ST 37) in the N7 class. G96 mode is superior due to its ability to automatically adjust rotational speed based on diameter, whereas in G97 mode, small diameters with high rotation (1273 rpm) increase roughness due to vibration or heat. This study recommends using G96 mode for optimal surface smoothness in step-turning of similar materials. rning of similar materials.
SIMULATION-BASED ANALYSIS FOR OPTIMIZING MOLD DESIGN OF PLASTIC HARDNESS TEST SPECIMENS USING KEY PARAMETERS Pujo Leksonowati, Nur Fitria; Pamungkas, Nurman; Manurung, Meilani; Aryswan, Adhe; Hakim, Rahman; Stefani, Windy; Purba, Adi; Khollilurrahman, Kholillurrahman; Batubara, Ninda
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.1945

Abstract

This study aims to compare the performance of two injection molding designs—Design A and Design B—for producing plastic hardness test specimens. Design A showed a fill time of 1.03 s and cooling quality covering 84.2% of the part, compared to 1.06 s and 72.4% for Design B. Design B, however, exhibited deflection of 0.96 mm versus 1.15 mm for Design A, and a maximum sink mark depth of 0.5687 mm versus 0.5773 mm. These characteristics in Design B support dimensional stability and limit visible defects, making it suitable for fabrication. Optimization strategies, such as adjustments to packing pressure, gate location, and the cooling system, are proposed to improve Design B's performance in terms of production efficiency and quality. The results indicate that, despite advantages in Design A, Design B offers a viable option for large-scale injection molding, balancing quality and operational efficiency.
Rancang Bangun Kerangka Tanaman Hidroponik Politeknik Negeri Batam Pamungkas, Nurman; Widiastuti, Hanifah; Restu, Fedia; Leksonowati, Nur Fitria Pujo; Arifin, Nurul Laili; Muvariz, Mufti Fathonah; Ulfah, Nurul; Widodo, Widodo; Baharudin, Budi; Fajrin, Aulia; Fyona, Annisa; Kamsyah, Domi; Gemala, Mega; Rosbandrio, Wowo; Aryswan, Adhe; Siregar, James; Saputra, Hendra; Irawan, Benny Haddli; Saputra, Ihsan; Ariyanto, Nugroho Pratomo; Mutiarani, Mutiarani
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol. 5 No. 1 (2023): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimaspolibatam.v5i1.4866

Abstract

The hydroponic pilot project in the Batam State Polytechnic area was motivated by problems with economic conditions and declining health conditions during the Covid-19 pandemic. This project is expected to support the "growing your own food movement" in an effort to reduce unemployment, increase food security and a healthy lifestyle. The hydroponic method was chosen because it is very easy to do and does not require a large area of "‹"‹land. In this community service activity, a hydroponic plant building framework will be made as a prototype of an efficient and efficient hydroponic building so that it can be used by the wider community. This activity is also useful for applying design knowledge as one of the PbL activities carried out by CAD, CNC, CAM, and Fabrication Engineering courses in the Mechanical Engineering Department, so that it can become an arena for higher education participation to support people's lives. The method of implementing this community service activity is to make observations to find a suitable area to build a hydroponic plant house, then the results of the observations are poured in the form of a design by utilizing software so that the materials needed and the shape of the framework that is built can be known. The last activity is making a hydroponic plant place. This activity is planned to be carried out from April to November 2021. Based on the results of the evaluation of the service program questionnaire for product distribution, it is known that the majority of respondents are satisfied with the products produced.
Pemberdayaan Pendidikan Vokasional: Pelatihan Mesin Laser cutting untuk Keterampilan Desain dan Fabrikasi di SMKN 9 Batam Leksonowati, Nur Fitria Pujo; Batubara, Ninda Hardina; Purba, Adi Syahputra; Cahyagi, Danang; Butar, Hendra Butar; Wijayanti, Ita; Manurung, Meilani Mandalena; Dzulfikar, Mohamad Alif; Stefani, Windy; Ulfah, Nurul; Aryswan, Adhe; Pamungkas, Nurman; Khollilurrahman, Kholillurrahman
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol. 6 No. 2 (2024): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimaspolibatam.v6i2.7016

Abstract

This community service initiative aims to enhance the skills of vocational school students in utilizing Laser cutting machines, serving as a platform for students in the Design and Visual Communication department of SMKN 9 Batam to fabricate products based on their own designs in preparation for the professional world. The participants involved in this initiative consist of 78 students from the aforementioned department. The community service program is structured through various stages, encompassing initiation, preparation, execution, activity review, and the compilation of a final report. Enthusiastically engaged, the participants, primarily from the Design and Visual Communication department, had previously focused their learning solely on the design phase. However, through this community service project, they actively participated in the fabrication process of designs they had created. Utilizing CAD applications, the designs were transformed into tangible products using acrylic as the raw material, ensuring that the resulting products align with the envisioned design. This initiative provides a valuable avenue for students to bridge the gap between design and fabrication, fostering practical skills crucial for their future endeavors in the workforce.
OPTIMALISASI SUMBER DAYA DAN TEKNOLOGI DALAM PROGRAM PEMBERDAYAAN MASYARAKAT DESA PULAU JEMARE Leksonowati, Nur Fitria Pujo; Pamungkas, Nurman; Butar, Hendra Butar; Aryswan, Adhe; Juangsa Putra, Lalu Giat; Fyona, Annisa; Nugroho, Cahyo Budi; Wibowo, Ari; Gemala, Mega; Ariyanto, Nugroho Pratomo; Arifin, Nurul Laili; Puspita, Roza; Sriyanto, Sriyanto; Dzulfiqar, Mohamad Alif; Stefani, Windy; Batubara, Ninda Hardina; Fajrin, Aulia; Purba, Adi Syahputra; Manurung, Meilani Mandhalena; Budiman, Budiman
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol. 7 No. 1 (2025): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimaspolibatam.v7i1.7105

Abstract

This paper discusses in depth the implementation of the Village Community Empowerment Program (P2MD) carried out on Jemare Island. The main focus of this program is the application of appropriate technology, which includes public street lighting and a water pump system, both powered by solar panels. The main objective of this initiative is to improve the quality of lighting and the provision of clean water on the island, two important aspects that are greatly needed by the local residents. Through a series of intensive observations and discussions with the local residents, the community service team was able to identify and solve various problems faced by the residents. As a result of these efforts, four street lights have been successfully installed and operated, and the water pump system has been successfully connected to the water pump machine and water storage tank. It is hoped that this initiative can have a significant positive impact on the quality of life of the residents of Jemare Island, support their business activities and economy, and provide a solution to the uneven distribution of electricity by the state electricity company (PLN). This solution is practical because it utilizes renewable energy in the form of sunlight, which is abundantly available on Jemare Island.
Dampak Jumlah Plasticizer dalam Nilai Kekerasan Plastik PVC Manurung, Meilani Mandhalena; Leksonowati, Nur Fitria Pujo; Pamungkas, Nurman; Stefani, Windy; Batubara, Ninda Hardina; Purba, Adi Syahputra
JURNAL INTEGRASI Vol. 16 No. 2 (2024): Jurnal Integrasi - Oktober 2024
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v16i2.8495

Abstract

This paper provides a detailed investigation into the effects of Trioctyl Trimellitate (TOTM) plasticizer levels on the hardness of Polyvinyl Chloride (PVC) materials. The study reveals an inverse correlation between the level of TOTM plasticizer and the hardness of PVC, with an increase in TOTM levels leading to a decrease in hardness. This trend is consistent across various PVC samples, despite minor variations. The role of plasticizers in determining the physical and mechanical properties of PVC is further explored, emphasizing their function in reducing PVC's crystallinity, thereby producing a clearer and more flexible material. This research contributes to the understanding of how plasticizers can be used to tailor the properties of PVC, leading to the development of two distinct types of PVC: Flexible PVC, which contains a plasticizer, and Rigid PVC, which does not. The findings underscore the importance of plasticizers in material design and engineering, offering valuable insights for future applications.
Studi Pembuatan Procedure Qualification Record untuk Repair through Thickness pada S355 KT0 Stefani, Windy; Leksonowati, Nur Fitria Pujo; Pamungkas, Nurman; Nugroho, Cahyo Budi
JURNAL INTEGRASI Vol. 16 No. 2 (2024): Jurnal Integrasi - Oktober 2024
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v16i2.8530

Abstract

This research aims to develop a Procedure Qualification Record (PQR) for Repair Through Thickness on S355 KT0 material using the GTAW method for the root, SAW for filler and capping. The welds were repaired using gouging and grinding before undergoing repair welding with the SMAW method. The study employed experimental methods with Non-Destructive and Destructive tests following AWS D1.1 and Client Specification MHK-COMP-SPE standards. The test results indicate defect-free welds that meet AWS D1.1 standards in terms of mechanical properties such as tensile strength, bending, impact, and hardness. The tensile strength values reached 609 MPa (longitudinal specimen) and 539 MPa and 540 MPa for transverse specimens. The lowest impact test value was 139J in the fusion line +2 mm repair to original welds area. The peak hardness test value was 240 VHN in the HAZ (repair to original weld) region. The test results were also used to formulate a PQR that aligns with specific requirements. This research is expected to provide guidance for performing repair welding on S355 KT0 material.
Co-Authors Adhe Aryswan Adi Syahputra Purba Adimas, Adimas Agung Saputra Ahmad Farhan, Ahmad Annisa Fyona Ari Wibowo Aulia Fajrin Auliana Diah Wilujeng Baharudin, Budi Batubara, Ninda Batubara, Ninda Hardina Budi Baharudin Budiman Budiman Butar, Hendra Butar Cahyo Budi Nugroho Danang Cahyagi Dety Febrianti Dimas Prasetyo Domi Kamsyah Dupan, Pandi Dzulfikar, Mohamad Alif Fajrin, Aulia Fedia Restu Firmansyah, Adi Ridho Hanifah Widiastuti Hendra Saputra Ihsan Saputra Irawan, Benny Haddli Ita Wijayanti James Siregar Khollilurrahman, Kholillurrahman Lalu Giat Juangsa Putra Leo Van Gunawan Manurung, Meilani Manurung, Meilani Mandalena Mega Gemala Meilani Mandhalena Manurung Mohamad Alif Dzulfiqar Mufariz, Mufti Fathonah Mufti Fathonah Muvariz Muhammad Ismail MUTIARANI MUTIARANI Mutiarani Mutiarani Nadhrah Wivanius, Nadhrah Naufal Abdurrahman Prasetyo Nicolanta Hiskia Sembiring Nidia Yuniarsih Nugroho Pratomo Ariyanto Nurman Pamungkas Nurul Laili Arifin Nurul Ulfah Nurul Ulfah Purba, Adi Rahman Hakim Rahman Hakim Rahman Hakim Ramadhani , Hasan Fajriansyah Reynaldi, Muhammad Ryan Rohmat, Abdul Rosbandrio, Wowo Roza Puspita Salman Al Faris Sapto Wiratno Satoto Siregar, James Sriyanto Sriyanto Suheri Suheri Widodo Widodo Widodo Widodo Windy Stefani