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Accurate: Journal of Mechanical Engineering and Science
Published by Politeknik Negeri Cilacap
ISSN : 27224279     EISSN : 27225089     DOI : https://doi.org/10.35970
Core Subject : Science, Engineering,
Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Accurate: Journal of Mechanical Engineering and Science is a peer-reviewed open-access journal with e-ISSN 2722-5089 and p-ISSN: 2722-4279 published by Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Cilacap. The journal invites scientists and engineers to exchange and disseminate theoretical and practice-oriented in the various topics include, but not limited to mechanical Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 10 Documents
 1 
Search results for , issue "Vol. 2 No. 2 (2021): October 2021" : 10 Documents clear
Pengembangan Desain Alat Pemotongan Kripik Singkong Dalam Peningkatan Produksi (Studi Kasus Pada UMKM di Pemalang) Saputro, Yoyo; Yudha Saksono, Deky
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.854

Abstract

Cassava is a tuber plant that can grow in tropical areas with hot and humid climates. In tropical climates cassava is needed for its growth process so that this plant cannot grow at temperatures below 10 c. Cassava is a tuber or tree root that can grow on sandy to clay soil, as well as on low fertility soil. The length of cassava ranges from 15-30 cm with a relatively different diameter, which is 2-5 cm. Cassava has a skin consisting of two layers, the first layer is the outer skin while the second layer is the inner skin with white or yellowish flesh. In its production so far, cassava cutting is still using human power (manual). It would be better if the production of cassava cutting increased without ignoring the existing human aspects. Therefore, a machine is needed as a human tool in increasing the productivity of cassava cutting. Significant results or not, can later be observed from the data obtained before and after using the machine. A significant increase after the experiment was carried out means that the cassava cutting machine was able to help the existing cutting process. This can be seen later by using SPSS calculations.
Pengaruh Perlakuan Alkaline dan Hot Water Treatment Terhadap karakteristik Kekuatan Komposite berpenguat serat kenaf dan Microcrystalline cellulose Sakuri, Sakuri; Dwi Nugroho, Dimas; Sugiarto, Tris
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.876

Abstract

Tujuan penelitian digunakan untuk mengetahui tingkat pengaruh perlakuan hot alkali pada serat kenaf dan melakukan penambahkan microcrystalline cellulose(MCC) untuk meningkatkan kekuatan tarik dan kekuatan lentur komposit. Serat kenaf direndam dengan larutan NaOH sebanyak 6 % berat dan aqudes. Waktu perendaman selama 6 jam dengan perlakuan hot alkali pada temperatur sebesar 40 °C, 60 °C dan 80 °C. Pencampuran matrik unsaturated polyester dan microcrystalline cellulose menggunakan magnetic stirrer dengan menerapkan metode Taguchi. matrik Unsaturated polyester dan MCC dicampur dengan suhu 40 oC, kecepatan putar 250 Rpm, selama waktu 30 menit, dengan komposisi MCC sebesar 5 %. Pencetakan komposit menggunakan sistem injection molding dengan penekan menggunakan kemampuan dongkak. Hasil pengujian kekuatan tarik menunjukkan adanya peningkatan sebesar 27,91 %, dari kekuatan tarik sebelum perlakuan 66,69 MPa menjadi 85,65 MPa. Hasil pengujian kekuatan lentur meningkat sebesar 31,41 %, dari serat tanpa perlakuan 75,25 MPa menjadi 98.89 MPa dengan perlakuan hot alkali 40 oC. Modulus elastisitas memiliki grafik yang sebanding dengan hasil kekuatan tarik dan kekuatan lentur. Peningkatan kekuatan tarik dan lentur dikarenakan serat telah bersih dari kotoran akibat perlakuan hot lkali dan pencampuran microcrystalline cellulose.
Pengaruh Variasi Porting pada Head Cylinder Terhadap Unjuk Kerja Mesin Sepeda Motor 4 Langkah 110 CC Warso, Warso; Rekto Prabowo, Nugrah; Nurwibowo, Trio
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.1010

Abstract

Improving engine performance can be done by making changes to the cylinder head to increase the volumetric efficiency. The purpose of this study was to determine the effect of ported variations on the cylinder head against the engine performance which includes: airflow, torque, and power, generated by the ported variations on the inlet channel inside the standard cylinder head with the inlet port size of 21.50 mm. The ported variation 1 with a 23.50 mm inlet port diameter, and the ported variation 2 with an inlet port diameter of 25.50 mm. The research method used was an experimental method, carried out on a 4-stroke 110 cc motorcycle. The results obtained indicated the differences in the performance produced, such as airflow, torque, and power in the three variations of the inlet port. In the Cylinder head ported variation 1, the maximum air flow obtained was 30 cfm at 7 mm valve opening. The airflow increased by 3.59% against the standard cylinder head which obtained a maximum airflow of 28.8 cfm at the same valve opening. On the other hand, the cylinder head ported variation 2 obtained a maximum airflow of 27.6 cfm at the same valve opening. It means that the airflow decreased by 4.77% against the standard cylinder head. On ported variation 1 cylinder head, a maximum torque of 8.91 Nm was obtained at 4250 rpm, resulting in the torque increase of 2.49% against the standard cylinder head which obtains a maximum torque of 8.58 Nm at 4500 rpm. With the ported variation 2 cylinder head, maximum torque of 8.15 Nm was obtained at 5750 rpm rotation, which means that the torque decreased by -3.53% against the use of a standard cylinder head. With ported variation 1 cylinder head, maximum power of 7.49 HP was obtained at 7250 rpm and the power increased by 2.41% against the standard cylinder head, which obtained maximum power of 7.27 HP at 7500 rpm. While the ported variation 2 cylinder head, the maximum power obtained was 7.16 HP at 7500 rpm, meaning the decrease in power obtained by -2.76% against the standard cylinder head.
ANALYZING INDUSTRY 4.0 WITH AN EXAMPLE FROM AGRICULTURAL MANUFACTURING Turapov, Bahram; Siegfried, Patrick
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.1079

Abstract

A study of industry 4.0 technologies in the John Deere and Company and their impact on company operations is presented in this paper. Deere and Company’s implementation of Industry 4.0 to its factories and its factors was the focus of the research. The literature review with the systematic approach as well as a comprehensive review of current John Deere and Company’s developments is used in the current study. Also, it relied on freely available information on the company website. Public and investor relations have also been used as credible sources of information. An analysis found that adopting industry 4.0 technologies to agriculture manufacturing results in higher quality products, increased productivity, safety, and wider acceptance among stakeholders. This study assumes full implementation of these technologies in all agriculture manufacturing companies, and it also emphasizes up-to-date technologies. Studying this topic can be useful for engineers in mechanical and agricultural fields, managers in business, and marketers.
Rancang Bangun Energi Matahari 300 WP Sebagai Suport Energi Listrik untuk Sistem Energi Hybrid Suripto, Heri
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.1515

Abstract

Hybrid energy having continuous development considering the energy needs continue to increase. As the development continues, the use of alternative energy becomes a solution in overcoming energy needs. This research will be designig and manufacturing solar energy as a support for electrical energy used for a hybrid system based on solar and hydro energy. From the results of the design of the solar cell module holder frame, it produces specifications for a height of 100 cm, a width of 67 cm and a length of 90 cm, from the calculation, the pump electric energy consumption of a 125 watt32 liters / minute to fill a 1000 liter water tank is 66.7 watts, the solar cell power calculation is 33.6 watts per unit, so that the number of solar cell modules needed is 2, the design of the solar cell module made is 3 units, 1 unit is used as electrical energy saving. The test results based on solar radiation, the average solar radiation intensity is 4916 (watt/m2) with a power of 19.76 watts.
Pengembangan Desain Alat Pemotongan Kripik Singkong Dalam Peningkatan Produksi (Studi Kasus Pada UMKM di Pemalang) Saputro, Yoyo; Yudha Saksono, Deky
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.854

Abstract

Cassava is a tuber plant that can grow in tropical areas with hot and humid climates. In tropical climates cassava is needed for its growth process so that this plant cannot grow at temperatures below 10 c. Cassava is a tuber or tree root that can grow on sandy to clay soil, as well as on low fertility soil. The length of cassava ranges from 15-30 cm with a relatively different diameter, which is 2-5 cm. Cassava has a skin consisting of two layers, the first layer is the outer skin while the second layer is the inner skin with white or yellowish flesh. In its production so far, cassava cutting is still using human power (manual). It would be better if the production of cassava cutting increased without ignoring the existing human aspects. Therefore, a machine is needed as a human tool in increasing the productivity of cassava cutting. Significant results or not, can later be observed from the data obtained before and after using the machine. A significant increase after the experiment was carried out means that the cassava cutting machine was able to help the existing cutting process. This can be seen later by using SPSS calculations.
Pengaruh Perlakuan Alkaline dan Hot Water Treatment Terhadap karakteristik Kekuatan Komposite berpenguat serat kenaf dan Microcrystalline cellulose Sakuri, Sakuri; Dwi Nugroho, Dimas; Sugiarto, Tris
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.876

Abstract

Tujuan penelitian digunakan untuk mengetahui tingkat pengaruh perlakuan hot alkali pada serat kenaf dan melakukan penambahkan microcrystalline cellulose(MCC) untuk meningkatkan kekuatan tarik dan kekuatan lentur komposit. Serat kenaf direndam dengan larutan NaOH sebanyak 6 % berat dan aqudes. Waktu perendaman selama 6 jam dengan perlakuan hot alkali pada temperatur sebesar 40 °C, 60 °C dan 80 °C. Pencampuran matrik unsaturated polyester dan microcrystalline cellulose menggunakan magnetic stirrer dengan menerapkan metode Taguchi. matrik Unsaturated polyester dan MCC dicampur dengan suhu 40 oC, kecepatan putar 250 Rpm, selama waktu 30 menit, dengan komposisi MCC sebesar 5 %. Pencetakan komposit menggunakan sistem injection molding dengan penekan menggunakan kemampuan dongkak. Hasil pengujian kekuatan tarik menunjukkan adanya peningkatan sebesar 27,91 %, dari kekuatan tarik sebelum perlakuan 66,69 MPa menjadi 85,65 MPa. Hasil pengujian kekuatan lentur meningkat sebesar 31,41 %, dari serat tanpa perlakuan 75,25 MPa menjadi 98.89 MPa dengan perlakuan hot alkali 40 oC. Modulus elastisitas memiliki grafik yang sebanding dengan hasil kekuatan tarik dan kekuatan lentur. Peningkatan kekuatan tarik dan lentur dikarenakan serat telah bersih dari kotoran akibat perlakuan hot lkali dan pencampuran microcrystalline cellulose.
Pengaruh Variasi Porting pada Head Cylinder Terhadap Unjuk Kerja Mesin Sepeda Motor 4 Langkah 110 CC Warso, Warso; Rekto Prabowo, Nugrah; Nurwibowo, Trio
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.1010

Abstract

Improving engine performance can be done by making changes to the cylinder head to increase the volumetric efficiency. The purpose of this study was to determine the effect of ported variations on the cylinder head against the engine performance which includes: airflow, torque, and power, generated by the ported variations on the inlet channel inside the standard cylinder head with the inlet port size of 21.50 mm. The ported variation 1 with a 23.50 mm inlet port diameter, and the ported variation 2 with an inlet port diameter of 25.50 mm. The research method used was an experimental method, carried out on a 4-stroke 110 cc motorcycle. The results obtained indicated the differences in the performance produced, such as airflow, torque, and power in the three variations of the inlet port. In the Cylinder head ported variation 1, the maximum air flow obtained was 30 cfm at 7 mm valve opening. The airflow increased by 3.59% against the standard cylinder head which obtained a maximum airflow of 28.8 cfm at the same valve opening. On the other hand, the cylinder head ported variation 2 obtained a maximum airflow of 27.6 cfm at the same valve opening. It means that the airflow decreased by 4.77% against the standard cylinder head. On ported variation 1 cylinder head, a maximum torque of 8.91 Nm was obtained at 4250 rpm, resulting in the torque increase of 2.49% against the standard cylinder head which obtains a maximum torque of 8.58 Nm at 4500 rpm. With the ported variation 2 cylinder head, maximum torque of 8.15 Nm was obtained at 5750 rpm rotation, which means that the torque decreased by -3.53% against the use of a standard cylinder head. With ported variation 1 cylinder head, maximum power of 7.49 HP was obtained at 7250 rpm and the power increased by 2.41% against the standard cylinder head, which obtained maximum power of 7.27 HP at 7500 rpm. While the ported variation 2 cylinder head, the maximum power obtained was 7.16 HP at 7500 rpm, meaning the decrease in power obtained by -2.76% against the standard cylinder head.
ANALYZING INDUSTRY 4.0 WITH AN EXAMPLE FROM AGRICULTURAL MANUFACTURING Turapov, Bahram; Siegfried, Patrick
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.1079

Abstract

A study of industry 4.0 technologies in the John Deere and Company and their impact on company operations is presented in this paper. Deere and Company’s implementation of Industry 4.0 to its factories and its factors was the focus of the research. The literature review with the systematic approach as well as a comprehensive review of current John Deere and Company’s developments is used in the current study. Also, it relied on freely available information on the company website. Public and investor relations have also been used as credible sources of information. An analysis found that adopting industry 4.0 technologies to agriculture manufacturing results in higher quality products, increased productivity, safety, and wider acceptance among stakeholders. This study assumes full implementation of these technologies in all agriculture manufacturing companies, and it also emphasizes up-to-date technologies. Studying this topic can be useful for engineers in mechanical and agricultural fields, managers in business, and marketers.
Rancang Bangun Energi Matahari 300 WP Sebagai Suport Energi Listrik untuk Sistem Energi Hybrid Suripto, Heri
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.1515

Abstract

Hybrid energy having continuous development considering the energy needs continue to increase. As the development continues, the use of alternative energy becomes a solution in overcoming energy needs. This research will be designig and manufacturing solar energy as a support for electrical energy used for a hybrid system based on solar and hydro energy. From the results of the design of the solar cell module holder frame, it produces specifications for a height of 100 cm, a width of 67 cm and a length of 90 cm, from the calculation, the pump electric energy consumption of a 125 watt32 liters / minute to fill a 1000 liter water tank is 66.7 watts, the solar cell power calculation is 33.6 watts per unit, so that the number of solar cell modules needed is 2, the design of the solar cell module made is 3 units, 1 unit is used as electrical energy saving. The test results based on solar radiation, the average solar radiation intensity is 4916 (watt/m2) with a power of 19.76 watts.

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