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All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Universitas Batanghari Jambi Dinamisia: Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Pendidikan Scholastic International Journal of Economics, Business and Accounting Research (IJEBAR) Akuntansi: Jurnal Riset Ilmu Akuntansi Metrik Serial Humaniora dan Sains
Syafri Syafri
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Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Kaji Numerik Pengaruh Beban Dinamik Terhadap Ketebalan Lapisan Film Dan Tekanan Hidrodinamik Pada Journal Bearing Menggunakan Finite Difference Method Fadila Alfandi; Dedi Rosa Putra Cupu; Syafri Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

One of the components used to hold the shaft that transmits power and rotation is the journal bearing. Journal bearing has the advantage of being able to withstand large loads and high rotation, however, journal bearing has a weakness, which is high friction. This high friction is minimized by means of lubrication, where the lubricant forms a film layer which functions as a separator between the journal and the housing so that mechanical contact does not occur. Journal bearing is usually work with dynamic loads on their operation, these dynamic loads affect the thickness of the film layer and the hydrodynamic pressure on the journal bearing. The al approach with the finite difference method is one method to determine the thickness of the film layer and the hydrodynamic pressure on journal bearing due to dynamic loads. The finite difference method is used to solve the differential equations in the dynamic load bearing Reynolds journal equation.The dynamic load acting on the journal bearing is the influence of non-dimensional amplitude and non-dimensional frequency. The nondimensional amplitude was varied from 0.1 to 0.5, while the non-dimensional frequency was varied π / 4, π / 2, π, 2π, 4π, and the observed time was 0.00 s to 0.09 s The conclusion is that the load on the journal bearing is directly proportional to the hydrodynamic pressure and inversely proportional to the thickness of the film layer with a maximum hydrodynamic pressure of 3,313 kPa and a minimum film layer of 32.92 μm, and the load of the journal bearing is directly proportional to the eccentricity ratio. The maximum eccentricity ratio is 0.675. Meanwhile, non-dimensional amplitude affects hydrodynamic pressure and non-dimensional frequency affects changes in hydrodynamic pressure with time. Keyword: Journal Bearing, Hydrodynamic, FDM, Dinamic Load
Analisis Struktur Mekanik Pada Mesin 3D Printer (CNC Hybrid 3-Axis) Menggunakan Software Autodesk Inventor 2018 Anju Pritia Dapa; Syafri Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The automation machine technology has been widely developed to help overcome the problems in manufacturing performance. One of the developed machines were the 3D Printer machine that can be used in various professional work fields. One of the machines developed by Riau University students is a 3D Printer machine called the CNC Hybrid 3-Axis Machine. However, there has been no research to examine whether this machine is safe to operate. Thus, the author took the initiative to determine the quality of the mechanical structure on the machine frame. Structural analysis studies and determines the effects of loads on physical structures and their components. The method used for the research on the mechanical structure of this machine is through manual calculation analysis and finite element method analysis using the Autodesk Inventor 2018 application. Each analysis is carried out on every part of the machine that experiences movement in the direction of the X-Axis, Y-Axis and Z-Axis parts, the frame and the machine legs. Through the results of the analysis, it can be seen that the maximum stress that occurs in the X-axis slider frame is 30.687 MPa from manual calculations and 29.81 MPa from the Autodesk Inventor simulation. The maximum deflection value occurs in the engine frame and the largest maximum deflection value occurs at the slider of X-Axis with a value of 0,3543 mm. By comparing the results of manual structural analysis and finite element analysis simulations, it can be seen that the structural frame has a safety factor value above 15 so it is safe to use and operate in the future. Keywords: CNC Hybrid 3-Axis, Structure Analysis, X-Axis, Y-Axis, Z-Axis.
Pengaruh Perubahan Dimensi Dan Jenis Material Terhadap Umur Worm Screw Press Type AP-17 Pada PTPN V Sei. Garo Apri Setiawan; Syafri Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

PTPN V Sei. Garo uses the recommended worm screw for about 1000 hours of work, but because of the often unexpected things sometimes the age of worm screw is always lower. To anticipate these problems then modified the material and dimensions are required. The purpose of this study is to determine the effect of material changes and dimensions on the age of worm screw. Then do a simulation using Autodesk Inventor to know the maximum and maximum deflection. After the calculation manually, based on data worm screw type AP-17 screw life worms obtained about 777 hours of work (± 1 month). The modifications were made for the addition of age: modified thick screw and pitch distance was obtained age of 1388 working hours and 920 hours of work, after the simulation using Autodesk Inventor was obtained maximum voltage 3.1 of Mpa and 6.3 Mpa with maximum deflection of 0.01 mm. However, by increasing the thickness and spacing of the screw pitch resulted in reduced screw press capacity, consequently impacting the capacity of the plant. There were many disadvantages from the modification of the dimensions, therefore the modification of matrial from AISI 1020 to AISI 1080 was obtained the screw worm life age of about 2190 hours of work, after simulation using Autodesk Inventor was obtained maximum voltage of 6.4 MPa with maximum deflection worth of 0. 01 mm.Key words: Screw Worm Age, Modified Dimension, Modified Matrial, Autodesk Inventor Simulation
Analisa Lintasan Robot Mekanisme Paralel Planar 3R Eka Setia Wahyudi; Syafri Syafri; Anita Susilawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Robots are tools that can help alleviate human work [1]. Robots also have more functions than humans, such as having a high level of accuracy, have speed in completing the work, can do repetitive work in large quantities, and can reduce the cost of production. In this research, we evaluated the singular condition of a 3-dof RRR parallel robot prototype in order to have a trajectory planning in accordance with the design result. The trajectory Planning is done by considering kinematic constants by using the parameter of DH method and the Jacobi matrix. From the test results, the workingspace area that can be used for trajectory 3R parallel mechanism is in the range of 280 mm in the direction of X axis, 225 for mm Y axis direction, 240 mm in the direction of A and 215 mm for axis direction of the axis B.Keywords : Trajectory Planning, Parallel Mechanism, Parallel Robot, Workingspace, Singularity
Perancangan Bark Belt Convey0r 27B Kapasitas 244 Ton/Jam Arief Yanuar Chrise; Syafri Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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In this research is described the bark conveyor calculations that must be performed in accordancewhit theories exist in the literature and the real situation. This is done to avoid failure during the ongoing production process. Bark conveyor has a length of 85 meters, a slope angle of 16 °, speed of 1.3 m/s and a payload capacity of 244 tons/hour. The analysis includes analysis of bark belt conveyor, idler rollers, pulleys, power motor, and a belt take-up. From thecalculations were resulted the weight belt at 11,286 kg/m,an idler rollers outside diameter of 108 mm,drive pulley diameter of 500 mm, tail pulley diameter of 400 mm, the motor power of 62,32 kW and length of belt take up by 0,85 m. This was influenced by the parameters in the calculation.Keyword : bark conveyor, belt, roller idler, drive motor.
Pengembangan Dan Pembuatan Sistem Kontrol Prototipe Mesin Cnc Milling 3 Axis Berbasis Arduino Uno Dengan Sistem Loop Tertutup Dimas Ariyono; Syafri Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Currently CNC machines are increasingly being made or developed either CNC machines in large scale dimensions or in prototypes. A multi axis of prototype CNC machine needs a circuit control systems that function as the engine's brain. The purpose of this research is to design and developing a circuit control of the CNC milling machine with 3 axis movement. All machining parameters would be setup and operated through the control system so that the machine can operate in accordance with the design in three axes. In the design of the control system used 3 stepper motors as a driver, where each was enabled to move the engine against the x, y, and z axis. There are several steps that must be done in this design, such as the selection of control element data. Furthermore, control elements consisting of Motor Driver, Stepper Motor, Power Supply, and Limit Switch are assembled according to schematic control design. The control system was connected to the PC through the Universal G-Code Sender software interface to be used to drive the actuator. Prior to use for machining processes, the control system needs to be calibrated so that the machine's sliding dimension matches the command dimensions of the PC. Control system on CNC machines designed using a close loop system where there was a Limit Switch as a feedback sensor to the engine, so what if there was a mistake (error) on the track machine, then the sensor would command the spindle back to home position.Key Words : Prototype CNC, Control System, Elements of Control, Universal G-Code Sender, Close Loop
Analisis Kapasitas Angkat Dan Gaya-Gaya Yang Bekerja Pada Lengan Tower Crane Jaso Tipe J240 Dodi Abrar; Syafri Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Tower Crane is a material transfer tool that is widely used in the construction of high rise buildings. The purpose of using this tower crane is to facilitate the transfer of building materials from one place to the desired place, and using tower cranes will also speed up the process of building a multi-storey building. The large number of building buildings in the midst of a crowd threatens the lives of people who are around the construction area. This is because the arm range of the tower crane that is installed reaches out of the construction area, which is certainly no safety limit. To determine the level of security of the tower crane when working on a predetermined load, analysis of tower crane components is carried out from the load capacity and manual loading analysis and using inventory software on the arm of the tower crane. Based on the result of manual loading analysis, the minimum safety factor value is 6.54 and using software inventory is 6.28.Keywords : Specifications, loading analysis, maximum voltage, yield stress, safety factor.
Improving agility and speed in playing soccer in first grade students in sd negeri no. 11 sungai apit kecataman sungai apit kabupaten siak Syafri Syafri
Jurnal Ilmiah Pendidikan Scholastic Vol 2 No 1 (2018): Jurnal Ilmiah Pendidikan Scholastic
Publisher : Fakultas Sastra Universitas Ekasakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (84.09 KB) | DOI: 10.36057/jips.v2i1.310

Abstract

Speed ​​and agility are the basic models in playing football and for the player is a successful capital to score, and keep the goal in check. By the ability of speed will facilitate the player in order to bring the ball. The problems of this research are: (a) How to improve the achievement mastery of football basics for students in the implementation of methods of demonstration?(B) How is the influence of demonstration methods on student learning motivation? The purpose of this research are (a) to know the improvement of learning achievement of soccer basics to students after the implementation of demonstration method, (b) to know the motivation to learn football basics after the implementation of demonstration method. This research uses action research as much as two rounds. Each round consists of two stages: design, activity and observation. Reflection and revise. The population of this research is first grade students in SD Negeri no. 11 Sungai Apit Kecamatan Sungai Apit Kabupaten Siak. From the data obtained as the result of the practice tests, observation sheet in teaching and learning process activities. From the analysis result, it can be seen that the students' learning achievement has increased from cycle I to II, cycle I (61.54%), cycle II (89,74%) for psychomotor domain, cycle I (84,62%).Cycle II (100%) for the affective domain Conclusions from this research is the demonstration of the method can be a positive influence on students' motivation to Class I Kelas I SD Negeri No.11 Sungai Apit Kecamatan Sungai Apit Kabupaten Siak and learning models can be used as an alternative physical education.
PEMBUATAN PETA GEOSPASIAL MELALUI PEMETAAN UDARA PADA KELURAHAN BATU BERSURAT, KECAMATAN XIII KOTO KAMPAR, KABUPATEN KAMPAR, PROVINSI RIAU Feblil Huda; Kaspul Anuar; Syafri Syafri; Anita Susilawati
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 1 (2019): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v3i1.2060

Abstract

One of the most commonly used geospatial mapping methods is photogrammetry (aerial mapping). Photogrammetry is a method of mapping objects on the surface of the earth by using aerial photography as a medium. The aerial mapping process is carried out through cameras installed on Unmanned Aerial Vehicle (UAV). From the aerial photography, object interpretation and geometry measurements will be carried out to produce line maps, digital maps and photo maps. In general, photogrammetry is a mapping technology by utilizing aerial photography to be processed into a geo-spatial information system. Batu Bersurat Village is one of the villages located in Subdistrict XIII Koto Kampar, Kampar Regency, which did not have a geospatial information map. Community service team from the Mechanical Engineering Department of the University of Riau had a plan to carry out community service activities in Batu Besurat Village in the form of making geospatial information maps through aerial mapping. This aerial mapping activity was carried out by utilizing UAV with the type of fixed wing. In its implementation, the community service activities were planned to involve Mechanical Engineering students, university students of the University of Riau, village officials and the local community. It is expected that with this community service program, the geospatial information system map made by Batu Bersurat Village can be used in village spatial planning for agricultural land, residential land and validation of village boundaries.
Perancangan Ulang Wire Rope Pada Sistem Hoisting Overhead Travelling Crane Kapasitas 55 Ton Di Area Crusher PT. Semen Baturaja (Persero) Tbk Indonesia Riski Dwi Prasetio; Syafri Syafri; Mustafa Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Hoisting system on overhead traveling crane capacity of 55 tons in the crusher area of PT. Semen Baturaja is designed for material handling processes, especially if it is needed in the event of equipment disruption or trouble in the area and also during factory shutdown. The main components of the hoisting mechanism consist of wire rope, pulley, drum, hook, lifting motor and mechanical brake. In this design initial data obtained from observations of objects and through discussions with resource persons in the field. Calculations and design up to determine the safe number of all the main components is obtained based on the appropriate literature. In this design the type of wire rope 6 x 41 + 1 Fiber 32 mm diameter is obtained and the estimated life of the wire rope is approximately 1 year with the assumption of 24 hour usage. Keyword : Overhead travelling crane, hoisting system, wire rope,design
Co-Authors Adhy Prayitno Alvi Syahri Anita Susilawati Anju Pritia Dapa Anuar, Kaspul Apri Setiawan Arief Yanuar Chrise Asral, Asral Bintal Amin Cupu, Dedi Rosa Putra Devri Naldy Dimas Ariyono Dodi Abrar Eka Setia Wahyudi Fadila Alfandi Feblil Huda Febrian Febrian Ikhlash Syukran Harrizal Margono Margono Muhamad Rifan Mustafa Akbar Nadhila Rahma Rustian Nazaruddin Nazaruddin Nirdukita Ratnawati Nursyirwani, Nursyirwani Putri Aulia Febrianti Rahmad Fauzi Richard Andrew Rijaluddin Farihd Riski Dwi Prasetio Suandi Suandi Teguh Iman Yudi Saputra Zoro Zulfikar