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All Journal Rotasi JURNAL TEKNIK MESIN AJIE (Asian Journal of Innovation and Entrepreneurship) Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Journal of Mechanical Engineering and Applied Technology
Rizal Mustofa
Department of Mechanical Engineering, Politeknik Negeri Semarang, Semarang, Central Java
Automotive Engineering Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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PERANCANGAN DAN PENGEMBANGAN PRODUK ALAT TERAPI JARI UNTUK MEMBANTU PROSES REHABILITASI PASIEN PASCA STROKE Rizal Mustofa; Rifky Ismail; Budi Setiyana
JURNAL TEKNIK MESIN Vol 10, No 2 (2022): VOLUME 10, NOMOR 2, APRIL 2022
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

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Abstract

Stroke is one of the leading causes of death in the world caused by blockage and broken blood vessels. To restore its function back, a rehabilitation process is needed, one of which is using finger therapy tools. The purpose of this study was to determine the structural strength of the finger therapy device, both on the support structure of the arm and on the structure of the palm of the hand. This study uses the software to determine the acceptable structural strength of the finger therapy device. Based on the simulations that have been carried out, the results obtained are the maximum stress of 0.087 MPa on the forearm support structure and 45,798 MPa on the palm support structure. The total deformation value is 0.001 mm in the forearm support structure and 1.2 mm in the palm support structure. While the safety factor value obtained is 15 on the forearm support structure and 1.18 on the palm support structure. From these results the structure is declared safe and can withstand the maximum load.
Perancangan Sepeda Air Low Cost sebagai Sarana Tempat Wisata di Banjir Kanal Semarang Rifky Ismail; Rizal Mustofa; Yahya Fikri Dwiyanto
Asian Journal of Innovation and Entrepreneurship Volume 06, Issue 02, May 2022
Publisher : UII

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ajie.vol6.iss2.art1

Abstract

The Sungai Banjir Kanal Barat is currently one of the attractions for the residents of Semarang City, but currently the Sungai Banjir Kanal Barat still does not have water attractions, one of which is a water bike ride. The design this time tries to make a water bike design that is suitable for water recreation in the Sungai Banjir Kanal Barat area of ​​Semarang City. In the design process, the design is carried out using Solidworks 2021 software and motion analysis is carried out on the transmission system. In addition, the design of this water bike is also equipped with material selection according to the conditions in the West Flood Canal River, Semarang City. Before designing the design, the author reviews several variations of the concept, then the author chooses the best concept to be used as a design design. The selected concept product weighs 67 kg, length 180 cm, width 120 cm, and height 90 cm. Most of the selected concept products use carbon steel material, and use PVC pipe as a float.
Upaya pencegahan sarkopenia melalui edukasi dan pengukuran kekuatan otot pada lansia Mustofa, Rizal; Julianti, Hari Peni; Ismail, Rifky; Priwintoko, Baharudin
Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Vol. 6 No. 3 (2025)
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jp2m.v6i3.24034

Abstract

Sarkopenia merupakan kondisi degeneratif yang ditandai dengan penurunan massa dan kekuatan otot. Pengabdian ini bertujuan untuk mencegah sarkopenia melalui sosialisasi, edukasi, dan tindak lanjut pengukuran kekuatan otot pada masyarakat lansia di Kelurahan Randusari, Kota Semarang. Metode yang digunakan meliputi edukasi dan skrining kekuatan otot menggunakan alat electromyography sebagai indikator dini risiko sarkopenia. Electromyography merupakan alat ukur kekuatan kontraksi otot yang dapat digunakan untuk mengevaluasi kondisi otot. Proses screening sarkopenia diawali dengan identifikasi gejala melalui kuesioner, dilanjutkan dengan pengukuran kekuatan otot menggunakan electromyography sebagai indikator utama. Jika kekuatan otot menunjukkan nilai di bawah ambang batas, maka dilakukan evaluasi performa fisik, seperti kecepatan berjalan, dilakukan untuk menentukan tingkat keparahan. Berdasarkan hasil pemeriksaan, sarkopenia diklasifikasikan menjadi probable, confirmed, atau severe. Hasil pengabdian menunjukkan peningkatan pemahaman peserta tentang pentingnya pola makan bergizi dan aktivitas fisik rutin, serta terdeteksinya kelompok lansia dengan risiko penurunan fungsi otot yang kemudian diarahkan untuk tindak lanjut intervensi kesehatan. Program ini memberikan dampak positif berupa peningkatan kesadaran pencegahan sarkopenia dan penguatan kapasitas komunitas dalam menjaga kesehatan otot lansia. Rekomendasi pengembangan program ini adalah pelaksanaan monitoring berkelanjutan dan pelibatan lebih luas dari pemangku kepentingan setempat untuk meningkatkan efektivitas pencegahan sarkopenia di masa depan.
Analisis Tingkat Efisiensi Mesin CNC Milling Berdasarkan Nilai Overall Equipment Effectiveness (OEE) dan Six Big Losses Mustofa, Rizal; Yudha, Venditias; Faizin, Muhammad
ROTASI Vol 27, No 2 (2025): VOLUME 27, NOMOR 2, JULI 2025
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.27.2.64-70

Abstract

Efisiensi mesin CNC Milling sangat berpengaruh terhadap produktivitas industri manufaktur. Penurunan kinerja mesin sering terjadi akibat gangguan operasional yang belum dianalisis secara sistematis. Metode Overall Equipment Effectiveness (OEE) dan Six Big Losses digunakan untuk mengukur efektivitas mesin serta mengidentifikasi sumber utama kehilangan efisiensi. Penelitian ini bertujuan untuk menganalisis tingkat efisiensi mesin CNC Milling berdasarkan nilai Overall Equipment Effectiveness (OEE) dan Six Big Losses selama periode Januari hingga Juni. OEE dihitung berdasarkan tiga parameter utama, yaitu Availability Rate, Performance Efficiency, dan Rate of Quality. Hasil analisis menunjukkan bahwa rata-rata Availability mencapai 99%, Rate of Quality 100%, dan Performance Efficiency sebesar 84,67%, dengan nilai OEE rata-rata sebesar 83,83%. Nilai ini menunjukkan bahwa performa mesin berada pada kategori baik, namun belum mencapai standar kelas dunia. Faktor utama yang menurunkan OEE adalah efisiensi performa yang masih di bawah optimal. Hasil menunjukkan bahwa kerugian terbesar berasal dari kategori Speed Losses, yaitu Idle and Minor Stoppages (41,72%) dan Reduce Speed Losses (35,35%), dengan total kontribusi 77,07% terhadap waktu kerugian. Downtime Losses menyumbang 22,93%, sementara Defect Losses tidak tercatat. Temuan ini mengindikasikan bahwa efisiensi mesin lebih dipengaruhi oleh kecepatan kerja dan gangguan kecil dibandingkan kerusakan atau cacat produk. Optimalisasi proses operasi dan penerapan Total Productive Maintenance (TPM) direkomendasikan untuk meningkatkan efektivitas mesin. Oleh karena itu, peningkatan efisiensi kerja dan pengurangan hambatan minor perlu dilakukan untuk meningkatkan produktivitas dan efektivitas mesin secara keseluruhan.
ANALISIS KINERJA MESIN LASER CUTTING TRULASER 1030 PADA PRODUKSI KENDARAAN KHUSUS MENGGUNAKAN METODE OVERALL EQUIPMENT EFFECTIVENESS (OEE) Fariz Wisda Nugraha; Sendie Yuliarto Margen; Rifky Ismail; Muhammad Farel; Yusuf Subagyo; Hartanto Prawibowo; Rizal Mustofa
Journal of Mechanical Engineering and Applied Technology Vol. 3 No. 2 (2025): VOLUME 3 ISSUE 2 YEAR 2025 (JULY 2025)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v3i2.6761

Abstract

The manufacturing industry is continuously challenged to improve production efficiency and quality. Production machinery plays a crucial role in supporting smooth manufacturing processes, especially in the fabrication of special vehicle components. One such machine is the TruLaser 1030, a 2D laser cutting machine manufactured by TRUMPF, which is used for processing body and accessory parts in special vehicles. This study aims to evaluate the performance of the TruLaser 1030 machine using the Overall Equipment Effectiveness (OEE) method, as well as to identify damaged machine components and maintenance requirements. The Total Productive Maintenance (TPM) approach is applied to enhance equipment effectiveness, prevent breakdowns, and ensure product quality and workplace safety. The OEE methodology involves three main parameters: Availability, Performance Rate, and Quality Rate. The results show the machine’s availability at 94%, performance rate at %, and quality rate at 97.1%. These findings suggest that the TruLaser 1030 machine operates at a relatively optimal level; however, regular evaluations of work systems and maintenance programs are necessary to maintain stable performance and continuously improve productivity.
Co-Authors Budi Setiyana Fariz Wisda Nugraha Hari Peni Julianti Hartanto Prawibowo Muhammad Faizin Muhammad Farel Priwintoko, Baharudin Rifky Ismail Rifky Ismail Sendie Yuliarto Margen Yahya Fikri Dwiyanto Yudha, Venditias Yusuf Subagyo