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STUDI PERBANDINGAN REGULATOR KONVENSIONALDUA RELAY DAN REGULATOR ELEKTRONIKBERBASIS MIKROKONTROLERAVR ATMEGA8 Wijayanti, Erma; Rubiono, Gatut; Mujianto, Haris
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

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Automotive charging system provide vehicleâs electricity consumption and battery charging. Common regulator has unstable voltage output. This research is aimed to compare the performance of common and electronic regulator. Electronic regulator designed with an AVR ATMega8 microcontroller and 16 x 2 matrix LCD. The devices are tested in the charging system of Toyota Kijang 5K automotive engine by measuring alternator voltage output using voltmeter. The engine is running at 1000, 1500, 2000, 2500 and 3000 rpm. The measurements are taken three times for 300 seconds with 30 second interval. The result shows that the average voltage output of electronic regulator increase faster at 0 until 30 second measurement period. The result also shows that electronic regulator has more stable voltage output which is 14,45 Volt. The overall comparison study shows that electronic regulator has better performance than common regulator.

STUDI PERBANDINGAN REGULATOR KONVENSIONALDUA RELAY DAN REGULATOR ELEKTRONIKBERBASIS MIKROKONTROLERAVR ATMEGA8 Wijayanti, Erma; Rubiono, Gatut; Mujianto, Haris
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (306.763 KB)

Automotive charging system provide vehicleâs electricity consumption and battery charging. Common regulator has unstable voltage output. This research is aimed to compare the performance of common and electronic regulator. Electronic regulator designed with an AVR ATMega8 microcontroller and 16 x 2 matrix LCD. The devices are tested in the charging system of Toyota Kijang 5K automotive engine by measuring alternator voltage output using voltmeter. The engine is running at 1000, 1500, 2000, 2500 and 3000 rpm. The measurements are taken three times for 300 seconds with 30 second interval. The result shows that the average voltage output of electronic regulator increase faster at 0 until 30 second measurement period. The result also shows that electronic regulator has more stable voltage output which is 14,45 Volt. The overall comparison study shows that electronic regulator has better performance than common regulator.

OPTIMALISASI PRESTASI MESIN BENSIN DENGAN VARIASI TEMPERATUR CAMPURAN BAHAN BAKAR PREMIUM DAN ETANOL Sanata, Andi
ROTOR Vol 5, No 2 (2012)
Publisher : ROTOR

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To reduce dependence on oil usage that increasing every day, many countries have adopted a substitution of petroleum fuels with renewable fuels such as ethanol is used as a blend in gasoline. Because ethanol can be produced from agricultural products such as corn, sugarcane, rice, etc., then the ethanol is one of the best alternative fuel in motor gasoline. Blending gasoline with ethanol would not fully produce a homogeneous mixture, need for additional treatment to obtain a more homogeneous results, one way is to heat the fuel. If the fuel is heated, there will be expansion or changes in fuel volume, in addition to the viscosity of the fuel will be decreased. Itâs can be explained by the theory of thermodynamics, which states that the higher the temperature of a fluid, the fluid molecules will move quickly so at fixed volume will increase the pressure. Fuel with low viscosity will be atomized better, resulting smaller granules. With these conditions the process of mixing fuel with air will be more homogeneous so that the fuel burn more. The results obtained from testing the performance of the engine is the highest maximum torque obtained when using T40ËC fuel, with 6.37 Nm at 3400 rpm, increased 22.5%. The highest maximum power obtained when using T40ËC fuel with 3.450 HP at 5600 rpm, increased 5.11%. lowest Fuel Consumption average obtained at T40ËC fuel with 4.46% more efficient. Keywords: gasoline, ethanol

INDEX PERFORMANCE ANALYSIS KUALITAS LAYANAN DAN MANAJEMEN STRATEGI PENATAAN KAWASAN WISATA SONGGORITI Dwilaksana, Dedi
ROTOR Vol 5, No 2 (2012)
Publisher : ROTOR

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The acceleration of economic growth in the region is supported by the potential of sectoral support the local economy in which one sector is tourism. The development of tourism has an important role for the development of an area, and evenly expand Â and employment opportunities, encouraging the development of local, regional and national income increase in order to improve the welfare and prosperity of the community. Stone City is one city where the tourism destination which is Tourism Songgoriti. The potential is very supportive in the growth of the real economy both in terms of products and services. Structuring economic support infrastructure around the holidays can be a priority so that regional economic growth is expected to not only provide opportunities for people with middle and upper economic level but more in favor of increasing the value of the benefit to the surrounding community. To support a more targeted policy measures, especially for the Holidays Songgoriti, it would require an identification of potential research activity in particular economic and business prospects around the area of ââservice quality attributes identified tourism areas Songgoriti desired by consumers (consumer expectations) and how consumer perceptions of attributes -attributes by field survey methods and questionnaires to the respondents who are consumers who have traveled to Songgoiti. Based on data from surveys and questionnaires and supported other secondary data and then do performance Index Analysis (IPA), SWOT Analysis. From the results of the new analyst made recommendations on the business prospects of the development plan Songgoriti tourism area in accordance with the desires of consumers, among others, relating to the restructuring and renovation Songgoriti markets, development of adequate parking facilities, arrangement of PKL to localize them along the roadside as they usually occupy This unique vehicle build date Doloe case of traditional stalls, performances of dance and music studio tadsional, etc.. In order to realize these plans is the management Songgoriti should coordinate intensively with people around the area with government policy support and consistent progressive Rock. Keywords: SWOT Analysis, Index Performance Analysis, intensive coordination

APLIKASI REFRIGERAN CAMPURAN LPG/CO2 PADA SISTEM REFRIGERASI KOMPRESI UAP Ilminnafik, Nasrul
ROTOR Vol 5, No 2 (2012)
Publisher : ROTOR

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A new binary mixture of R744 and R290 as an alternative natural refrigerant to halocarbon was presented in this paper. Its environmental performance is friendly. It has an ODP of zero and GWP smaller than 20. This work investigates the result of an experimental study carried out to determine the performance of a refrigeration system. Experimental studies for this mixture were performed on machine installation A.C. Bench, P.A. Hilton. Ltd.. Serial No. A573/41154. LPG-CO2 mixing ratio used was 90:10; 85:15; 80:20% by mass, with the total mass of the mixture of 300 grams. The results showed that the increase of air velocity at the evaporator with CO2 concentrations is constant, which is causing the increase on refrigeration capacity. While the addition of CO2 concentration mixed refrigerant causing decrease on refrigeration capacity. This is due to the increasing CO2 concentration causes a decrease in enthalpy of the mixture, which causes the refrigeration capacity is also decreased. Increased of air flow velocity at the evaporator at a concentration of CO2 remains causing compressor work resulting decrease. This is due to an increase in air velocity causing an increase in temperature of the evaporator so that the required compressor work is decrease. Increase of concentration of CO2 in the mixture causes the compressor work increases because CO2 has a high-pressure work so that the compression load is increasing and the compressor were employment given compressor is also increasing. Increase of air flow rate causes the coefficient of performance of refrigeration systems is getting increased. While the increase in CO2 concentrations has led to the decrease of performance coefficient Keywords: Hydrocarbon refrigerant, LPG, CO2, coeffisient of performance.

PERANCANGAN DAN PENGEMBANGAN PRODUK RAGUM DENGAN METODE QUALITY FUNCTION DEPLOYMENT (QFD) Sidhartawan, Robertus
ROTOR Vol 5, No 2 (2012)
Publisher : ROTOR

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Vise used in the work bench or work processes functioning manual for gripping the workpiece and can also be used in the machining process. Most of the manufacturing industry in Indonesia, still not able to design their own products. In the process of making problems often arise include the design can not be realized, the high cost of manufacture or product functionality that is not being met, so it can be said that not enough manufacturing industries are well qualified to produce quality products that can compete. Quality Function Deployment (QFD) is a method used to anticipate and prioritize the needs and desires of consumers, as well as incorporating the needs and desires of the consumer goods and services produced by the company. The purpose of this research is to design and develop products vise using the Quality Function Deployment. The data required in this study consisted of primary data and secondary data. Primary data were obtained from the distribution of questionnaires to the respondents. Secondary data was collected through library research. From the research, it can develop new products with specifications vise: (1) vise must be equipped with a third axis of rotation (14.14%), (2) vise with solid physical form (10.71%), (3) Price selling cheap (10.20%), (4) is equipped with a vise grip (9.05%), (5) vise is equipped with a practical guide (9.04%), (6) vise should be light (9, 03%), (7) pencekam jaw vise flexible, flat (8.27%), (8) vise easy to diasembling (8.27%), (9) Material of vise HR 1040 (7.6%), (10) Age used (7.36%), (11) The components easily obtainable (6.36%). Key word : Vise, Quality Function Deployment, House of Quality

PERANCANGAN DAN PENGEMBANGAN MESIN PENGAHANCUR SAMPAH ORGANIK MODEL PISAU PUTAR (ROTARY) Hermawan, Yuni; Badriani, Ririn Endah; Sakharuddin, M
ROTOR Vol 5, No 2 (2012)
Publisher : ROTOR

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This design to make the organic garbage crusher machine which its structure can be made easy and cheap by society, and can be operated simply, moved by diesel engine 20 hp own the ability can can break the permanent organic garbage upon which compost. This activityÂ divisible in 2 solution framework that is technical solution framework and solution non technical. Technical Approach: approach to society of orchard Damsari by attending method/machine to processes and dissociate the garbage type so that heaping sum up the deductible garbage. Approach of non technical: approach to citizen by guiding and growing to develop the society awareness about its important keep cleaning environmental and sanitasi. From final this activity inferential that: making of organic garbage crusher machine earn the especial problems faced by group society orchard of Damsari town Sempu Banyuwangi. Making of enforceable organic garbageÂ Machine better as according to time plan which have been determined, Especial problems partner concerning garbage processing with the this machine attendance expected depending to on duty deductible town Sempu hygiene and createdÂ society of self manage garbage. Result from this garbage processing machine in the formÂ organic garbage upon which compost of the size 2-3 cm and organic garbage process become the compost used by farmer group, so that indirectly can improve the earnings of society of orchard Damsari and permeating new labour. Keyword: crusher, organic garbage and compost.

ANALISA TEGANGAN VON MISES PADA ALAT BANTU JALAN (WALKER) Jokowiyono, Sadeli; Mulyadi, Santoso
ROTOR Vol 5, No 2 (2012)
Publisher : ROTOR

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Movement for a walk is a function that needs to be helped, especially for the elderly because they experienced degradation of function or sick, one of them is degradation of the bodys energy balance. Not uncommon among those who have trouble for walking, that is because the degradation on muscle strength in the limbs, for example, arm muscles, hand muscles, limb muscles, and leg muscles. Moreover, if the condition is accompanied by degenerative diseases such as osteoporosis, Parkinsons, stroke, knee pain, and fractures. A walker, making the right solution. One of the tools is Walker. Walker is an assistant to a very lightweight, portable, high waist, is made of metal pipe, and this tool comes with two handles that serves as a place that used to hold users and is equipped with four sturdy legs as the pedestal. While the power of the framework are analyzed with the help of CATIA V5R14 software is to determine the stress that occurs in order to operate as a walker. It appears that the greatest stress occurs is still under tension permission of the material itself. Stress equivalent (Von-Mises stress) that occurs should not exceed 1.583333e+007 N/m2 while the voltage that occurs on the order of 1.77e +005 N/m2 walker located at the foot of the minimum voltage while working on the framework of the 6.98e-009 N/m2 located on the frame. Key words: walker, von mises stress and framework.

ANALISIS VARIASI TEMPERATUR LOGAM KATALIS TEMBAGA (Cu) PADA CATALYTIC CONVERTER UNTUK MEREDUKSI EMISI GAS KARBONMONOKSIDA (CO) DAN HIDROKARBON (HC) KENDARAAN BERMOTOR Sanata, Andi
ROTOR Vol 5, No 1 (2012)
Publisher : ROTOR

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The air pollution rate caused by the vehicles in big cities is now reach the critical limit. It affects the environmental health as well as the financial factors. To reduce the pollutant gas from the vehicle engines emission, a technology is needed. One of the technology is the application of catalytic converterÂ inside the exhaust emission. A research has been done on 125 cc motorcycle engine to modify its exhaust emission. The catalysts used in this research was made of copper and designed using the honeycomb system with various diameters ( 4, 6, 8, 10, 12 mm). The observation variables are catalyst temperature, CO and HC emission rate. The emission of CO and HC from the sample engine was then compared with the standard emission rates. Result showed that increase of the copper catalyst temperature resulted in decrease ofÂ CO and HC emission rates. The decrease started to occur for all the catalysts at 225 oC. Optimum convertion efficiency is up to 47,93 % (CO) and 50,36 % (HC). Both optimum efficiency reached at the temperature of 325 oC using 8 mm diametered catalysts. Keywords : air pollutions, honeycomb system catalytic converter, temperature and copper

ANALISIS SIFAT MEKANIK HASIL PENGELASAN ALUMINIUM AA 1100 DENGAN METODE FRICTION STIR WELDING (FSW) Sumarji, Sumarji; Sudrajat, Angger; Darsin, Mahros
ROTOR Vol 5, No 1 (2012)
Publisher : ROTOR

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Aluminum and aluminum alloys have properties that are less well when coMPared to steel, such as specific heat and has a high conductivity. They are also easily oxidized and form an aluminum oxide Al2O3 which have a high melting point. Consequently, when they are welded the fusion between base and weld metal will be blocked. Moreover, if the cooling process is too fast it will form a smooth cavity ex-pouch of hydrogen. Friction stir welding (FSW) is a challenging alternative for joining aluminum alloy. In FSW, process occur in the solid state (solid state joining). In this research, some attempts were carried out to find the best quality of welding, in term of mechanical properties and microstructure. Tool rotation speed was varied at 780, 980, 1120 rpm. Whereas, feed rate used was keep constantly at 15 mm/min. The material to be welded is a- 4.0 mm thick aluminum AA 1100 strips. Result showed that the highest strength obtained is 56.528 MPa at 1120 rpm and the lowest strength obtained is 38.472 MPa at 980 rpm. Wormholes and the lack of penetration defects are the main things that reduce the tensile strength. From micro observations known on the grains shape of the stir zone, FeAl3 particles is spread more evenly in matrix of Al Â due to the stir process during the welding process. Hardness tests showed that the weld metal is softer than the base metal. Keywords: Aluminum, welding, FSW

Home Page

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Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Nasrul Ilminnafik

Contact Email
jurnal.rotor@unej.ac.id

Phone
+628123290147

Journal Mail Official
jurnal.rotor@unej.ac.id

Editorial Address
Jl Kalimantan 37

Location
Kab. jember,

Jawa timur

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Nasrul Ilminnafik

Contact Email jurnal.rotor@unej.ac.id

Phone +628123290147

Journal Mail Official jurnal.rotor@unej.ac.id

Editorial Address Jl Kalimantan 37

Location Kab. jember, Jawa timur INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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Abstract

Contact Name
Nasrul Ilminnafik

Contact Email
jurnal.rotor@unej.ac.id

Phone
+628123290147

Journal Mail Official
jurnal.rotor@unej.ac.id

Editorial Address
Jl Kalimantan 37

Location
Kab. jember,

Jawa timur

INDONESIA