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PEMBUATAN DAN PENGUJIAN MESIN PERAJANG TALAS Wardianto, Dedi; Hafni, Hafni; Hadi Perkasa, Mego
Jurnal Teknologi dan Vokasi Vol 1 No 1 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.1.31-37

This taro chopper machine will work when the electric motor is turned on it will rotate then the rotary motion of the machine is transmitted to the pulley by using a v-belt to move the shaft, the disk where the knife will rotate and the taro is ready to be chopped. After the taro is chopped it will come out through the funnel. So far, industry or industrial machinery products have shown very rapid capabilities, both in terms of volume and in terms of the variety of products produced. Product development is not only marked by the fulfillment of public interest in industrial products, both small and large scale but also leads to exports which will increase foreign exchange for the Indonesian state. There are many agricultural communities, one of which is taro because the season is suitable for the territory of Indonesia. With the development of appropriate technological advances, technological tools can be found that can process agricultural products, so thoughts are made on how to increase and ease work or process crops or process taro products to increase selling prices even better. The general aim of the research is to facilitate the slicing of taro for chip entrepreneurs, especially taro chips, and it can also be operated for cutting or slicing such as tempeh, potatoes, sweet potatoes, carrots, etc. The specific purpose for making this tool is to know the capacity of the taro chopper, to know the components that exist in the taro chopper, and to analyze the results of the taro chopper. From the manufacture of the tool, it can be concluded that this taro chopper is operated semi-automatically using an electric motor. This machine chopping method is a single chopper with 1 type of knife that cuts the taro continuously. This taro chopper machine design requires power from an electric motor of HP. The effective capacity of the tool obtained by the taro chopper machine is 33.3 gr/s.

PENGARUH SUDUT ELEKTRODA 75, 85, 90 PADA LONGITUDINAL ARAH MUNDUR TERHADAP PRESENTASE PENETRASI Hafni, Hafni; Rifqi, Rifqi
Jurnal Teknologi dan Vokasi Vol 1 No 1 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.1.68-74

Shielded Metal Arc Welding (SMAW) is one of the liquid welding processes (fusion welding) that produces a homogeneous fusion of the electrode with the base metal (base metal), which is caused by an electric arc that generates high heat to melt the electrode and base metal (base metal). simultaneously and protected by a shielding gas from the chemical reaction of the electrode flux. The depth of fusion formed is determined by the heat input, the electrode angle and the welding direction. The research was conducted at the Mechanical Engineering Laboratory of the Padang Institute of Technology. The base metal used is low carbon steel ST 37 with a thickness of 10 mm and a length of 100 mm. width 100mm. Welding is carried out on the surface of the base metal in the flat position, the type of connection (weld type) is a surfacing weld with 4 welding lines, each strip having a distance of 20 mm. Weld length 100mm. AWS E 6013 electrode specifications with a diameter of 3.2 mm. SMAW welding machine AC current with a voltage of 30 V. current 85 A. The measured electrode angle between the electrode and the welding line is 750, 850, 900. The backward welding direction where the electrode draws the welding fluid into the welding path and the normal arc height where the distance between the electrode and the base metal is equal to the diameter of the electrode. From the welding results, a penetration presentation will be obtained, namely the ratio of the depth of fusion to the width. The research results obtained welding speed: 2.48 mm/s for electrode angle 750, 2.49 mm/s for electrode angle 850 and 2.51 mm/s for electrode angle 90. Heat input for electrode angle 750 is 1015.93 J/ mm, the heat input for the electrode angle 850 is 1024.20 J/mm and the heat input for the electrode angle 900 is 1015.93 J/mm. From the comparison of the width with the depth of fusion, it is obtained; The electrode angle 85 has a penetration presentation of 9.85%, which is better in height than the electrode angle 750, which has a penetration presentation of 8.43%, and the electrode angle 900 has a penetration presentation of 8.35%.

PERFORMANSI ALAT PENGASAPAN IKAN DENGAN SISTEM ROTARI HORIZONTAL Perdana, Mastariyanto; Hafni, Hafni; Yulianti, Lusi; Romi, Romi; Alfith, Alfith; Pratiwi, Putri; Nurzal, Nurzal
Jurnal Teknologi dan Vokasi Vol 2 No 1 (2024): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2024.2.1.69-77

One of the fish preservation techniques that are widely used today is the smoking technique. In general, the smoking process was still traditional and used a conventional oven. This method is an easy way to smoke fish. The purpose of this study was to determine the efficiency of the fish smoking device using a horizontal rotary system. This smoking device consists of a smoking chamber, a furnace, a rotary catfish holder, a DC motor, gears, and a chain. The capacity of this rotary system smoker is 9 kg of wet fish. The fish used in this study were catfish and skipjack fish. This smoking uses the result of burning cinnamon. Cinnamon will produce smoke which is useful for smoking fish. The weight of wet fish in one smoke in this study was 8 kg. The smoking method has a standard ratio of wet fish weight to dry fish weight of 4: 1. For smoking catfish, after smoking for 2 hours at a temperature of 80 oC - 90 oC, the weight of catfish becomes 2 kg. For smoking skipjack tuna, after smoking for 2.5 hours at a temperature of 80 oC - 90 oC, the weight of skipjack tuna becomes 2 Kg. From the test results, it can be concluded that the rotary smoking system is very good for use as a fish smoking tool because it has a high enough efficiency compared to traditional tools such as ovens where the traditional smoking method takes 36 hours and the oven system smoking method takes as long as 12 hours.

UNJUK KERJA MESIN LAS GESEK ROTARY PADA BAJA KERBON RENDAH DILIHAT DARI STRUKTUR MAKRO DAN UJI BENDING Hafni, Hafni; Wardianto, Dedi
Jurnal Teknologi dan Vokasi Vol 2 No 2 (2024): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2024.2.2.113-118

Friction welding is a welding process that produces fusion through heat generated between two joint surfaces due to the mechanical movement of the rubbing surfaces. The heat produced due to surface friction is very dependent on the number of rotations of the driving motor.Testing of this rotary type friction welding machine was carried out in the Mechanical Engineering laboratory of the Padang Institute of Technology. The friction welding machine has a motor power of 2 HP producing 3950 rpm rotation at the chuck and the connection press uses a hydraulic jack and is equipped with a braking system which functions to stop the motor rotation after the connection occurs with a braking time of 1.1 seconds.The test material used is low carbon steel with a diameter of 10 mm and a diameter of 8 mm, the length of the test material is 8 cm. The amount of test material with a diameter of 10 mm is 6 rods. And the number of test materials with a diameter of 8 mm was 6 rods. The surfaces of the test materials being joined must be flat and clean from rust or other chemical substances that could damage the connection.The results of tests carried out on steel bars with a diameter of 10 mm with an initial length of 16 cm with three tests obtained an average final length of 15.5 cm with an average total welding time of 79 seconds and a time for heat generation and pressure of 20 seconds, a large pressing force of 196 N. On the test material with a diameter of 8 mm, an initial length of 16 cm with three tests obtained an average final length of 15.5 cm and a total welding time of 49 seconds, heat time of seconds, pressing force of 157 NFrom the macro structure tests and bending tests, it shows good b=mechanical properties where in the test samples there are no breaks or cracks in the nugget joints formed. Keywords: Rotation, heating time,

Application for Data Processing of KKNT Student Activities in Sei Limbat Village, Selesai District, Langkat Regency Hafni, Hafni; Zen, Muhammad; Syahpita Tarigan, Junusdad
Bahasa Indonesia Vol 16 No 05 (2024): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar

Thematic Real Work Lecture (KKNT) is a form of education by providing learning experiences for students to live in the community outside the campus, who are directly together with the community to identify potential and handle problems so that they are expected to be able to develop the potential of the village / region and concoct problems in the village. KKNT activities are expected to hone partnership soft skills, interdisciplinary / scientific teamwork (cross-competency), and student leadership in managing development programs in rural areas. The purpose of KKNT activities is an activity to provide opportunities for students to apply their knowledge, technology and skills to collaborate with many stakeholders in the field, and help accelerate development in rural areas. The results of this service will record the activities of KKNT students in this application, from each KKNT student activity from the results of monitoring by field supervisory lecturers that the KKNT students 90% carry out activities with partner field supervisors and 10% of making KKNT student activity reports.

Implementasi Metode Yolo pada Deteksi Objek Manusia Herdianto, Herdianto; Hafni, Hafni; Nasution, Darmeli; Ramadhan, Syahrul
METHOMIKA: Jurnal Manajemen Informatika & Komputerisasi Akuntansi Vol. 8 No. 2 (2024): METHOMIKA: Jurnal Manajemen Informatika & Komputersisasi Akuntansi
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/jmika.Vol8No2.pp234-240

Until now, the problem of theft of motorbikes and livestock in North Sumatra is still quite high. Locations for motorbike theft can occur in many places such as schools, homes, parking lots, offices and so on, while for livestock it can occur on pastures and in pens during the day or night and the perpetrators are men. To make this theft a success, various modes are used in varying human positions, from sitting, squatting to standing. To help overcome this, several object detection methods have been developed such as Background Subtraction, Template Matching, Histogram Oriented Gradient (HOG), Deformable Part-based Model (DPM) and Viola Jones (VJ). Of the many methods that have been used, there are still shortcomings, namely in terms of time, accuracy and various human positions. For this reason, research was carried out with the aim of improving the time and level of accuracy in detecting human objects using the YOLO method. The research stages carried out in this research include literature study, collecting data, determining training and test data, creating programs, training, and testing. From the trials carried out, it is known that YOLO can detect humans in various positions with a mAP value of 0.99 and an average detection time of 810.01 ms.

Pengaruh Kualitas Produk, Harga, Dan Review Terhadap Keputusan Pembelian Di Shopee Hafni, Hafni; Yasni, Yasni; Milanisi, Italiani; Asmi, Nur; Hidayanti, Nurul; Rudianto, Rudianto
YUME : Journal of Management Vol 7, No 2 (2024)
Publisher : Pascasarjana STIE Amkop Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37531/yum.v7i2.7155

Penelitian ini bertujuan untuk mengetahui Pengaruh Kualitas Produk, Harga, Dan Review Terhadap Keputusan Pembelian Produk Emina Di Shopee. Penelitian ini dilakukan pada pengguna produk Emina. Ukuran sampel yaitu 35 pengguna produk Emina yang berdomisilidi Kota Palopo. Metode yang digunakan adalah teknik purposive sampling.Pengumpulandatadilakukanmelaluikoesioner sebagai alatnya. Data dikumpulkan dengan menggunakanskalalikert5poinuntukmengukur2indikator.Teknikanalisisyangdigunakanadalah analisis regresi linear berganda.(1) Hasil penelitian yang dilakukan menunjukkan bahwa variabel kualitas produk, harga dan review secara simultan berpengaruh signifikan terhadap keputusan pembelian produk Emina di Shopee. Diketahui sig 0,000 < 0,05. (2) Hasil penelitian yang dilakukan menunjukkan bahwa kualitas produk secara persial berpengaruh signifikan terhadap keputusan pembelian produk Emina di Shopee .Diketahui sig 0,009 < 0,05. (3) Hasil penelitian yang dilakukan menunjukkan bahwa harga secara persial tidak berpengaruh signifikan terhadap keputusan pembelian produk Emina. Diketahui sig 0,701 > 0,05. (4) Hasil penelitian yang dilakukan menunjukkan bahwa review secara persial tidak berpengaruh signifikan terhadap keputusan pembelian produk Emina. Diketahui sig 0,745 > 0,05. Kata Kunci:Kualitas produk, harga, review dan Keputusan pembelian

Rancang Bangun Sistem Persediaan Barang Untuk Mesin Produksi CPO Pada CV. Hamparan Sawit Makmur Berbasis Web Octavianty, Hany; Hafni, Hafni; Hendrawan, Jodi
INTECOMS: Journal of Information Technology and Computer Science Vol 8 No 1 (2025): INTECOMS: Journal of Information Technology and Computer Science
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/intecoms.v8i1.14240

CV. Hamparan Sawit Makmur saat ini melakukan beberapa pencatatan dalam mengelola kebutuhan alat produksi menggunakan cara konvensional yang dituliskan pada buku dan diinputkan pada Ms. Excel, sehingga mengalami berbagai masalah dan kendala diantaranya pengolaan data, pengelolaan pencarian data dan pengelolaan laporan yang dibutuhkan oleh manager perusahaan dalam pengambiulan keputusan. Dengan adanya perancangan sistem pengelolaan berbasis web akan memudahkan dalam pengelolaan database data persediaan barang unutk produksi mesin dan dalam perancangannya dapat menggunakan UML (Unifield Modelling Language) yang memudahkan dalam memberikan gambaran alur perancangan sistem yang dibangun.

PERFORMANSI ALAT PENGASAPAN IKAN DENGAN SISTEM ROTARI HORIZONTAL Perdana, Mastariyanto; Hafni, Hafni; Yulianti, Lusi; Romi, Romi; Alfith, Alfith; Pratiwi, Putri; Nurzal, Nurzal
Jurnal Teknologi dan Vokasi Vol 2 No 1 (2024): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2024.2.1.69-77

One of the fish preservation techniques that are widely used today is the smoking technique. In general, the smoking process was still traditional and used a conventional oven. This method is an easy way to smoke fish. The purpose of this study was to determine the efficiency of the fish smoking device using a horizontal rotary system. This smoking device consists of a smoking chamber, a furnace, a rotary catfish holder, a DC motor, gears, and a chain. The capacity of this rotary system smoker is 9 kg of wet fish. The fish used in this study were catfish and skipjack fish. This smoking uses the result of burning cinnamon. Cinnamon will produce smoke which is useful for smoking fish. The weight of wet fish in one smoke in this study was 8 kg. The smoking method has a standard ratio of wet fish weight to dry fish weight of 4: 1. For smoking catfish, after smoking for 2 hours at a temperature of 80 oC - 90 oC, the weight of catfish becomes 2 kg. For smoking skipjack tuna, after smoking for 2.5 hours at a temperature of 80 oC - 90 oC, the weight of skipjack tuna becomes 2 Kg. From the test results, it can be concluded that the rotary smoking system is very good for use as a fish smoking tool because it has a high enough efficiency compared to traditional tools such as ovens where the traditional smoking method takes 36 hours and the oven system smoking method takes as long as 12 hours.

UNJUK KERJA MESIN LAS GESEK ROTARY PADA BAJA KERBON RENDAH DILIHAT DARI STRUKTUR MAKRO DAN UJI BENDING Hafni, Hafni; Wardianto, Dedi
Jurnal Teknologi dan Vokasi Vol 2 No 2 (2024): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2024.2.2.113-118

Friction welding is a welding process that produces fusion through heat generated between two joint surfaces due to the mechanical movement of the rubbing surfaces. The heat produced due to surface friction is very dependent on the number of rotations of the driving motor.Testing of this rotary type friction welding machine was carried out in the Mechanical Engineering laboratory of the Padang Institute of Technology. The friction welding machine has a motor power of 2 HP producing 3950 rpm rotation at the chuck and the connection press uses a hydraulic jack and is equipped with a braking system which functions to stop the motor rotation after the connection occurs with a braking time of 1.1 seconds.The test material used is low carbon steel with a diameter of 10 mm and a diameter of 8 mm, the length of the test material is 8 cm. The amount of test material with a diameter of 10 mm is 6 rods. And the number of test materials with a diameter of 8 mm was 6 rods. The surfaces of the test materials being joined must be flat and clean from rust or other chemical substances that could damage the connection.The results of tests carried out on steel bars with a diameter of 10 mm with an initial length of 16 cm with three tests obtained an average final length of 15.5 cm with an average total welding time of 79 seconds and a time for heat generation and pressure of 20 seconds, a large pressing force of 196 N. On the test material with a diameter of 8 mm, an initial length of 16 cm with three tests obtained an average final length of 15.5 cm and a total welding time of 49 seconds, heat time of seconds, pressing force of 157 NFrom the macro structure tests and bending tests, it shows good b=mechanical properties where in the test samples there are no breaks or cracks in the nugget joints formed. Keywords: Rotation, heating time,

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