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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Indonesian Journal Of Environmental Science and Technology INSIST (International Series on Interdisciplinary Research) Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Adhy Prayitno, Adhy
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Aerospace Engineering Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Other

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Studi Kecermatan Alat Ukur Roundness Tester Machine Produksi Laboratorium Jurusan Teknik Mesin Universitas Riau Dengan Metode Helix Shodikin, Shodikin; Prayitno, Adhy; Arief, Dodi Sofyan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

measuring clock or Dial indicators is a comperator device. typically used in industrial activities in particular at product deviation, because it has good accuracy. Precision and accuracy is the closeness to the true value, can be defined as the closeness (cloness) between the values read from the measuring instrument to the true value. The use of measuring devices which have high accuracy and good will generate accurate measurement data and vice versa use measuring devices that are not good or accurate, then the results obtained are not accurate. This study aims to determine the accuracy of measuring instruments by varying the motor speed to the drive dial indicator with helix methods, and large roundness deviation (Roundness Tester Machine). The result showed that the roundness deviation for each speed roundness of the lowest value and the highest at speed 0,040 m / s is: MCC = 0.008 mm to 0.124 mm, MZC = 0.008 mm to 0.122 mm, MIC = 0.006 mm to 0.029 mm, and LSC = 0.005 to 0.085 mm. Then to the speed of 0.046 m / s roundness deviation obtained MCC = 0.007 mm to 0,186 mm, MZC = 0.005 mm to 127 mm, MIC = 0.005 mm to 0.121 mm, LSC = 0.005 mm to 0,113 mm, while the speed of 0.071 m / s roundness deviation obtained for MCC = 0.094 mm to 0.611 mm, MZC = 0.047 mm to 0,153 mm, MIC = 0,050 mm to 0.107 mm, LSC = 0.042 mm to 0.111 mm, the speed of 0,040 m / s is closer to the data than the speed of other mandrel, the effect of instrument error is evident from the table 4:20 on four very large positions are not accurate Measure tool is e (mm) = 0.0830 or e (%) = 42.17, and the roundness deviation at speed of 0,040 m/s by the largest outer circle the minimum is 0.124 mm, the inner circle is 0.122 mm maximum, the minimum of a circle area is 0.122, and for the least squares circle is 0.042 mm. The fourth circle of reference is used, then the circle of least squares best used to determine the roundness deviation results in accordance recommended ISO.          Keywords : deviation, helix method, Roundness Tester Machine, speed variation.
Improvement of peat soil capillary density A comprehensive approach to solve fire disaster in peatland area Prayitno, Adhy
Indonesian Journal of Environmental Science and Technology Vol 1, No 1 (2014)
Publisher : Universitas Riau

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Abstract

In the last seventeen years, Riau province has suffered from fire disaster and smog despite several effortstaken by the government. These problems have brought damaging impact to the peatland forest where fireis likely to occur especially during dry season. The continuation of fire disaster in peatland has caused theorganic compound within peat soil to decompose and oxidize. The physical characteristics of the peatland arealso changing, for instance: its ability to restore water. In dry season peat soil is extremely dry due to the depletionof groundwater. This has caused the peatsoil release methane gas which will affect the soil porosity.This condition makes peatland prone to fire. This paper suggests that the improvement of capilary density of thepeat soil as a preventive way to stop the fire incident. The method is carried out by replanting endogeneousplants or vegetation on the peatland. A tube of 5 11m diameter is capable of rising the water up to 2.96 m fromthe surface of table water (groundwater level). It is aproximately equal to radius of xylem tube within plants.The height of a column of water in a single tube with a circular cross-section radius r is driven by the balanceof two forces. They are force of gravity and adhesive florce between the walls of the tube.Key word: capillary density, moisture content, wetting, replanting, ground waterlevel
Rancang Bangun Rangka Sun Tracking Pada Panel Surya Dinamik Mafiqi, Arif; G, Yogie Rinaldy; Prayitno, Adhy
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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This study aims to design a Sun Tracking frame in dynamic solar panels. The methodology of this research has 4 main steps: (1) Literature Study, (2) Design Concepts, (3) Concept Selection, (4) Frame Making. in this study a Sun Tracking machine designed for solar cells was designed to follow the movement of the sun. The design stages consist of needs analysis, preparation of product technical specifications, design of product concepts to produce alternative product concepts which are then selected concepts to be made. From the form of the concept that will be made, static analysis is carried out on the mechanical components of the Sun Tracking engine. Static analysis is done by means of manual calculation and elemental analysis. Based on the results of the static analysis, the results of the stresses were 8.381 MPa on stem 1, 8.769 MPa on rod 2, 0.5378 MPa on rod 3 and 0.6448 MPa on rod 4. Deformation that occurred was 0.02783 mm at stem 1, 0.03107 mm on stem 2, 0.0003228 mm on stem 3 and 0.0002346 mm on stem 4. Keywords: Sun Tracking, solar cell
Pengujian Kebulatan Hasil Pembubutan Poros Aluminium Pada Lathe Machine Type LZ 350 Menggunakan Alat Ukur Roundness Tester Machine Saputra, Rachman; Arief, Dodi Sofyan; Prayitno, Adhy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Machining process is a manufacturing process in which the object is formed by removing or abolishing most of the material of the object works. Reason used machining process is to obtain accuracy than other processes such as casting process, forming and also to provide a form of the inside of a particular object. This study aimed to obtain the test roundness data of the aluminum shaft using Roundness Tester Machine, process and analyze the test data. This test method 10 points in each axis. The three feeding is used (0.082 mm / rev, 0.114 mm / rev, 0.143 mm / rev) data obtained unanimity the most good at feeding 0.114 mm / rev that is Minimum circumscribed circle 0.045 to 0.229, the Maximum inscribed circle 0,046 to 0,249, Minimum radial zone 0.052 to 0.237, Least Squares Circles 0,024 to 0.134. Based on research data using a lathe turning type LZ 350 Lathe better roundness deviation is second with a feeding shaft 0.114 mm / rev net by a correction factor Roundness Tester Machine is between 0.018 mm to 0.133 mm and the average value of 0.058 mm. The test results obtained are not in accordance with the theory of reference, it should be feeding the lowest (0.082) which has a roundness deviation which was better than feeding 0.114 and 0.143, this can be due to (Humman error) operators put the test center axis or not alignemnt, specify datum turning and lathes Lathe LZ 350 type is not in optimal performance.Keywords: Machining, Roundness, Roundness Tester Machine
Comparison of Commercial and Palm Slag Motorcycle Brake Pads Performance Badri, Muftil; Arief, Dodi Sofyan; Prayitno, Adhy
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 38 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v38i1.393

Abstract

This paper presents a number of experimental data and techniques used in performance of commercial and palm slag motorcycle brake pads. The experiments include wear and hardness tests. The wear behavior of motorcycle brake pad that was observed in the study on sliding contact member brake discs results in the conversion of kinetic energy into heat at the pad and disc interface leads to this investigation. The effects of speed of disc brake rotor are presented. Experimental results of the respective tests are presented on two motorcycle brake pads, namely commercial brake pad (CBP) and palm slag brake pad (PBP). It was found that the wear behavior of palm slag brake pad is influenced by design of geometry shape of motorcycle brake pad. The wear behavior of CBP and PBP composite depend on wet and dry condition. It is clearly seen that wear behavior of PBP composite increase significantly with dry condition. Wear behavior increase significantly with the increase of rotor speed. With increasing speed of rotor disc, the hardness of PBP composite changes from low hardness to a more stable hardness behavior.
Electric Power Optimizing Of Solar Panel SystemThrough Solar Tracking Implementation; A Case Study in Pekanbaru Prayitno, Adhy; Irvan, Muhammad; Nurharsanto, Sigit; Yantoa, Wahyu Fajar
International Series on Interdisciplinary Science and Technology Vol. 2 No. 2 (2017)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ins.v2i2.85

Abstract

Observations and measurements have been conducted towards a solar panel electric power output that is utilized by a solar tracking system. The electrical power output depends on the position of the sun and time and the direction of the panel surface against the angle of the incident light. For power optimization, the solar panel surface should always be directed perpendicular to the direction of the sunlight falling to the surface of the panel. The application of the solar tracking system controlled by a micro controller gives the expected results. The electrical power output of a static solar panel mounted on a fixed position becomes the benchmark of the output electric power value in this study. The measurement results of the electric power output of the solar panel with sun tracking system shows a significant increase in sunny weather conditions.The average increase of that is about 57.3%.Keywords: LDR, micro controller, optimal power output, performance improvment, sun tracking,
Warning System and Automatic Engine Cut off Control Deveploment for Heavy Machine; A Case Study on KOMATSU PC130F-7 Prayitno, Adhy; Masykuri, Imron
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 63 No 2 (2019): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (510.395 KB) | DOI: 10.36842/jomase.v63i2.157

Abstract

An alert and automatic engine cut-off system is an integrated device to prevent the machine from experiencing sudden damage while operating. This system works using feedback principles controller as one component of the regulatory system that functions to process the feedback signal and the reference input signal or error signal becomes a control signal. The purpose of this study is to design a preventive system as a form of controller development for the heavy machine. As a case study, the system is employed on Komatsu PC130F-7 Excavator for engine cut-off functions if there are errors or abnormal engine oil levels and pressures. Komatsu PC130F-7 Excavator is heavy equipment with the highest population in the area of plantations and industrial plantations, especially in Riau and surrounding areas. The controller created is the development of an existing controller on the Machine by adding the engine cut-off feature if there are abnormal oil levels and pressures, and also as an alternative solution to the current problems, that is for safety and preventing more serious damage to the engine. The oil level sensor will be active if the oil level is below the low on the H-L (high-low) measuring stick, and the oil pressure sensor will read if the oil pressure is below 0.49 kPa (0.5 kg / cm²). This design has two inputs, that is a voltage of ± 15 volts on the path of the engine oil level sensor and oil pressure sensor. This voltage is used as an input that activates the relay work to respond to lower engine speed from 1880 rpm to 950 rpm and continued by the timer work as a time lag regulator to cut off the electricity on the starting engine line so that the engine will automatically stop turning and shut down.
Imaging and Programming Based Computation of Logistic Package Volumes Application on Automatic Mail Machines Prayitno, Adhy; Shiddiq, Minarni; Arief, Dodi Sofyan; Mirdanies, Midriem; Ayunita, Dyna
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 62 No 1 (2018): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (511.287 KB) | DOI: 10.36842/jomase.v62i1.150

Abstract

At present the determination of weight and volume has been widely used to assist in the process of determining costs for freight forwarding services. Shipping costs are determined by the weight of the goods, but the weight of the goods consists of two types, namely actual weight and volume weight. The weight of the weighing will be used directly if the item or box is small, but if the item is large but the weight is real then the weight of the volume will be used. Algorithms that combine triangulation and 2D measurement techniques can be used to build 3D surfaces so they can measure the volume of a product. Determination of volume in the optical scoring system can be done using the laser triangulation method and the area of 2D image measurement, then using a computer algorithm to get the results of 3D images to determine the volume of the object. The calculation process used in this study uses MATLAB software. MATLAB is the most efficient software for matrix-based numerical calculations and is widely used in mathematical calculations, development and algorithms, programming modeling, prototyping and simulation, data analysis, exploration and visualization, numerical and statistical analysis, and technical application development. The results of the study using MATLAB include students becoming more interested in learning and more independent in learning mathematics, can visualize data graphically to help analyze the data analyzed, and help in modeling the characteristics of variations in fuel mixtures which include density, viscosity, dynamic and kinematic viscosity.
Co-Authors Ayunita, Dyna Dodi Sofyan Arief, Dodi Sofyan G, Yogie Rinaldy Mafiqi, Arif Masykuri, Imron Midriem Mirdanies Minarni Shiddiq, Minarni Muftil Badri Muhammad Irvan Nurharsanto, Sigit Saputra, Rachman Shodikin, Shodikin Yantoa, Wahyu Fajar