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Journal of Mechanical Engineering Learning
Published by Universitas Negeri Semarang
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Arjuna Subject : -
Articles 139 Documents
 9   10   11   12   13 
ANALISIS PERANCANGAN DAN PEMBUATAN PROGRAM PLC PEMBACAAN ENCODER PADA SISTEM ROBOT RECORD AND REPLAY
Journal of Mechanical Engineering Learning Vol 1 No 1 (2012): Journal of Mechanical Engineering Learning
Publisher : Journal of Mechanical Engineering Learning

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Abstract

Robot-robot industri banyak menggunakan sistem pemrograman numeric control (NC). Salah satu bagian yang sangat penting untuk mendukung aspek kemudahan pada robot yaitu dengan menggantikan sistem pemrograman numeric dengan sistem record and replay gerakan berbasis Programmable Logic Control (PLC) dan Visual Basic. Tujuan penelitian ini adalah untuk mengetahui Perancangan dan pembuatan program PLC pembacaan data pulse encoder dan pembeda arah gerakan encoder. Metode perancangan penelitian ini dengan merancang langkah kerja yang pertama dikerjakan adalah membuat dan merangkai trainer PLC dengan encoder. Membuat program pembacaan encoder pada CX-Programmer. Kemudian menguji program dengan cara memutar encoder. Berdasarkan hasil pembahasan pengujian pembacaan data pulse dan arah gerakan encoder pada pengujian dengan satu sampai lima kali gerakan putaran encoder dapat terbaca semua dengan prosentase ketepatan 100% dan tingkat error program mendapat prosentase ketepatan dengan rata-rata 94%. Many industrial robots using the programming systems, numeric control (NC). One part that is essential to support the aspects of convenience on a robot that is by replacing the numeric programming system with a system of record and replay a movement-based Programmable Logic Control (PLC) and Visual Basic. The purpose of this research is to know the design and manufacture of PLC program reading the data of pulse encoder and encoder movement direction differentiator. Design method of this study step by designing the first work done is create and stringing trainer PLC with encoder. Make the program reading the encoder on the CX-Programmer. Then test the program by turning the encoder. Based on the results of the deliberations of the reading of the data of the test pulse and direction of movement of the encoder on testing with one to five times the movement encoder can read all with 100% accuracy percentage and the level of accuracy percentage program gets an error with an average of 94%.
KARAKTERISASI BRIKET DARI LIMBAH PENGOLAHAN KAYU SENGON DENGAN METODE CETAK PANAS
Journal of Mechanical Engineering Learning Vol 2 No 1 (2013): Journal of Mechanical Engineering Learning
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Abstract

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh variasi temperatur cetakan ter-hadap karakteristik briket kayu sengon dengan cara menguji sifat fisik, kimia dan kekuatan mekaniknya. Bahan yang digunakan dalam penelitian ini adalah serbuk kayu sengon yang diperoleh di industri pengolahan kayu yang berada di kecamatan Gunung Pati. Pembuatan briket diawali dengan penjemuran serbuk gergaji kayu sengon hingga kadar air kurang dari 14% kemudian digiling, diayak lolos mesh 60 dan ditimbang 3,5 gram setiap sampel. Sebelum dilakukan pembriketan, cetakan di-panaskan terlebih dahulu. Ada tiga perlakuan yaitu, temperatur cetakan 1000C den-gan mengkondisikan temperatur bahan baku 800C, temperatur cetakan 1200C den-gan mengkondisikan temperatur bahan baku 900C dan temperatur cetakan 1400C dengan mengkondisikan temperatur bahan baku 1000C. Pembriketan dilakukan dengan cara pemadatan bahan baku pada tekanan 6000 Psig dengan waktu pena-han 1 menit. Pembuatan briket dilakukan tanpa menambahkan bahan lain untuk perekat. Hasil penelitian menunjukkan bahwa nilai kalor yang dihasilkan sebesar 4250,63 kal/gr. Energi densitas tertinggi terdapat pada temperatur cetakan 1200C sebesar 3494,018 kal/cc. Hasil penelitian menunjukkan bahwa spesimen dengan pengaruh variasi temperatur cetakan yang paling baik yaitu dimiliki spesimen den-gan variasi temperatur 1200C. Proses variasi temperatur cetakan berpengaruh ter-hadap stability dan drop test tetapi tidak berpengaruh terhadap densitas.AbstractThe objective of this study is to influence of temperature variation to wood briquette char-acteristic of sengon by testing the nature of physical, chemical and strength of mechanic. The materials used in the study is wood serbuk of sengon obtained in industry processing of wood residing in district of Gunung Pati. Making of briquette early with wood sawdust drier of sengon till rate irrigate less than 14% ;then milled, to be sieved to get away mesh 60 and deliberated by 3,5 gram each sampel. Before conducted by briquette, die temperatur heated beforehand. There is three treatment that is, temperature variation1000C with condition of raw material temperature 800C, temperature variation 1200C with condition of raw material temperature 900C and temperature variation 1400C with condition of raw material tempera-ture 1000C. Briquette conducted by condensation of raw material at pressure 6000 Psig with holding time 1 minute. Making of briquette done without enhancing other materials for glue. Result of research indicate that calorific value yielded equal to 4250,63 kal/gr. highest energy density there are at temperature variation 1200C equal to 3494,018 kal/cc. Result of research indicate that spesimen with influence of temperature variation of that is owned by spesimen with temperature variation of 1200C. Process influence of temperature variation of have an effect on to and stability of drop test but do not have an effect on to density.
PENGARUH VARIASI TEMPERATUR CETAKAN TERHADAP KARAKTERISTIK BRIKET KAYU SENGON PADA TEKANAN KOMPAKSI 5000 PSIG
Journal of Mechanical Engineering Learning Vol 2 No 1 (2013): Journal of Mechanical Engineering Learning
Publisher : Journal of Mechanical Engineering Learning

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AbstrakPotensi limbah industri pengolahan kayu sengon sangat banyak, mulai dari potongan rant-ing, kulit dan sisa gergajian. Limbah dari sisa gergajian pohon sengon saat ini masih jarang dimanfaatkan oleh masyarakat setempat. Sampah tumbuhan tersebut apabila diolah dengan zat pengikat polutan akan menjadi suatu bahan bakar padat buatan yang lebih luas penggu-naannya sebagai bahan bakar alternatif yang disebut briket. Adapun tujuan yang ingin dicapai dari penelitian ini adalah untuk mengetahui pengaruh variasi temperatur cetakan terhadap karakteristik briket kayu sengon dengan cara menguji sifat fisik, kimia dan kekuatan mekan-iknya. Pembuatan briket diawali dengan penjemuran serbuk gergaji kayu sengon hingga kadar airnya kurang dari 14% kemudian digiling, diayak lolos mesh 60 dan ditimbang 3,5 gram se-tiap sampel. Pembriketan dilakukan dengan cara mengkondisikan bahan baku pada tempera-tur 800C untuk temperatur cetakan 1000C, 900C untuk temperatur cetakan 1200C, dan 1000C untuk temperatur cetakan 1400C. Setelah mencapai temperatur yang diinginkan briket dipa-datkan dengan cara pengepresan pada tekanan 5000 Psig dan waktu penahan 1 menit. Pem-buatan briket dilakukan tanpa menambahkan bahan perekat. Hasil penelitian menunjukkan pembuatan briket dengan metode cetak panas berpengaruh terhadap sifat fisik yaitu stability dan shatter index, dari hasil uji yang dilakukan briket terbaik berada pada variasi temperatur cetakan 1200C, karena pada suhu ini lignin dapat mengikat partikel briket dengan baik, tetapi metode cetak panas tidak berpengaruh terhadap densitas, akan tetapi densitas berpengaruh terhadap tekanan kompaksi. Pembuatan briket dengan metode cetak panas berpengaruh den-gan briket yang dihasilkan, karena mampu untuk meniadakan bahan perekat sehingga proses pembuatan briket lebih cepat, briket langsung dapat digunakan tanpa proses pengeringan dan mampu mempertahankan nilai kalor bahan baku.AbstractPotential industrial waste processing sengon very much, ranging from pieces of twigs, bark and sawn rest. Waste from the rest of the tree sawn sengon is still rarely used by local people. Waste plant when mixed with a binder pollutants will be a solid fuel made wider use as an alternative fuel called briquettes. The objectives of this study was to determine the effect of temperature variations on the characteristics of wood briquettes mold sengon by examining the physical, chemical and mechanical strength. Making briquette begins with drying sawdust sengon until the water level is less than 14% then ground, sieved pass 60 mesh and weighed 3.5 grams of each sample. Pembriketan done by conditioning the raw material at a temperature of 800C to 1000C mold temperature, mold temperature 900C to 1200C, and 1000C to 1400C mold temperature. After reaching the desired temperature by pressing briquettes compacted at a pressure of 5000 psig and a 1-minute barrier. Making briquettes made without added adhesives. Results showed manufacturing briquettes to heat molding method affects the stabil-ity and physical properties Shatter index, the results of tests conducted briquettes are best at 1200C mold temperature variation, because at this temperature the particles can bind lignin briquettes well, but the heat does not print method effect on the density, but the density effect on the compacting pressure. Making briquettes to heat molding method affects the briquettes produced, because it is able to eliminate the adhesive so that the briquette-making process faster, briquettes can be used directly without drying process and are able to maintain calorific value of raw materials.
ANALISIS PANAS PADA KNALPOT BERBASIS SPONGE STEEL
Journal of Mechanical Engineering Learning Vol 2 No 2 (2013): Journal of Mechanical Engineering Learning
Publisher : Journal of Mechanical Engineering Learning

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AbstrakPenelitian ini bertujuan untuk mengetahui panas sponge steel, panas gas buang, dan panasbody knalpot berbasis sponge steel. Metode penelitiannya adalah dekripstif. Membaranyasponge steel ini mencapai rata-rata panas 545 oC pada putaran 7000 rpm, panas tersebutnaik mencapai 118% dari panas dalam knalpot standart yang hanya mencapai 250 oC. Penurunanpanasgasbuang inimencapai25.8% padaputaran 7000rpmkarenaterjadipenurunantekanangasbuang setelah melewatiruangmixerknalpot berbasisspongesteel. Panasbodyknalpotberbasisspongesteel yangdilapisi asbesmencapai49.3 oCpada putaran 7000 rpmsedangkanknalpotstandartmencapaipanas 114oCsehingga penurunantemperaturpanasknalpotberbasisspongesteel sebesar56.7%.Simpulan penelitianinipanasknalpotberbasisspongesteel meningkatdrastisdariknalpot standart,tetapigasbuang yangdihasilkan menurunkarenaterdapat ruangmixerdi dalamknalpot untukmensearahkanpartikelpanasyangbergerakacak sehingga tekanan menurun.AbstractHeat Analysis Based On Sponge Steel Exhaust. This study aims to determine the heat spongesteel, hot flue gas, and heat-based sponge stainless muff ler body. The research method is dekripstif.Thissteel spongeiscandescent averaged545 oCheatat 7000rpmrotation,theheatroseto118%of the heat in the exhaust standard, which only reached 250 oC. This decrease in exhaustgasheat to reach25.8%at7000 rpmrotationdue to a decreaseinpressureof the exhaustgas after passing through a sponge-based steel exhaust mixer. Hot body exhaust sponge-basedasbestos-coated steel reached 49.3 °C at 7000 rpm rotation while the standard exhaust heatreaches 114 °C so that the hot exhaust temperature reduction based steel sponge was 56.7%.The conclusions of  this study based sponge stainless exhaust heat from the exhaust standardincreased dramatically, but the resulting f lue gas decreases because there is space in the exhaustmixer for saming direction hot particles that move randomly so the pressure decreases.
RANCANG BANGUN BOILER PADA INDUSTRI TAHU UNTUK PROSES PEMANASAN SISTEM UAP DENGAN MENGGUNAKAN CATIA V5
Journal of Mechanical Engineering Learning Vol 2 No 2 (2013): Journal of Mechanical Engineering Learning
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AbstrakPenelitian ini bertujuan untuk: 1) merancang kontruksi boiler jenis Vertical fire tube boiler menghasilkan uap jenuh pada temperatur 100 0C – 150 0C, 2) merancang boiler menggunakan standar perancangan ASME (American Society of Mechanical Engineers), 3) mengetahui desain dan analisis statis boiler menggunakan CATIA V5. Metode penelitian menggunakan Research and Development dengan bantuan perangkat lunak (software). Hasil penelitian didapatkan spesifikasi boiler tekanan uap operasi 2 bar dan tekanan internal perancangan 6 bar. Dimensi boiler yaitu diameter 757 mm, tinggi 2200 mm dan didalamnya terdapat pipa api dengan diameter 68 mm berjumlah 21 buah. Bahan bakar menggunakan kayu bakar. Volume air maksimal yang dapat di isikan dalam boiler hingga 327 liter. Material yang digunakan plat carbon steel SA 285 Grade C dan pipa seamless carbon steel SA 53 Grade B. Analisis statis boiler diperoleh tegangan maksimal 2,92 x 108 N/m2, displacement maksimal yang terjadi pada kontruksi boiler adalah 1,47 mm. Kontruksi boiler memiliki angka keamanan 1,42.The objective of this research are: 1) to design contruction of boiler tipe Vertical Fire Tube boiler to result 100 0C – 150 0C saturated steam temperature, 2) to design boiler with ASME (American Society of Mechanical Engineers) of plan standart, 3) to determine the design and static analysis boiler with CATIA V5. The method used in this research is Research and Development with software. These results get boiler specification 2 bar of operation steam presure and 6 bar of internal design presure. Boiler dimention are 757 mm of diameter, 2200 mm of high and on inside are 68 mm diameters of 21 fire tube. The fuel is wood. Maximal water volume to be used in boiler up to 327 liter. The material used are carbon steel SA 285 Grade C and pipe seamless carbon steel SA 53 Grade B. Analysis static of boiler to result 2,92 x 108 N/m2 of maximal strees, maximum displacement on the boiler contruction is 1,47 mm. Boiler contruction have 1,42 of safety value.
MODEL PELAKSANAAN PRAKTIK KERJA INDUSTRI (PRAKERIN) KOMPETENSI KEAHLIAN TEKNIK PERMESINAN DI SMK NEGERI 1 KEDUNGWUNI
Journal of Mechanical Engineering Learning Vol 3 No 1 (2014)
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This study aims to describe the implementation of work practices in the industry SMK Negeri 1 Kedungwuni, cooperation with DU/DI and the dual system of education models used in prakerin. This research uses descriptive qualitative method. Research subjects Machinery Engineering class XII student, school as an organizer and DU/DI as a cooperation partner. Informants consisted of a tutor, Head of Engineering Machinery, students and DU/DI. Data collection techniques of observation, questionnaires, interviews and documentation. Results showed (1) prakerin implementation has been running very well, from the preparation stage prakerin, implementation and evaluation prakerin. Implementation prakerin by Machinery Engineering class XII students were divided into two waves. (2) collection of data through observation carried out in schools, a questionnaire was given to students of class XII Engineering Machinery, interview with the Head of Engineering Machinery, tutor, student and DU/DI. Documentation is done when the research is ongoing. The conclusions of this study: overview prakerin in SMK Negeri 1 Kedungwuni involves three stages: preparation prakerin aspects, implementation and evaluation prakerin. Model of the cooperation with DU/DI a MoU, a model release prakerin a block models for the students to concentrate on activities prakerin. Advice for schools to continue to maintain cooperation as well as possible because it has been running very well and prakerin value should be included in the certificate and the absence of a column value in the report cards.
STUDI KOMPARASI PENGGUNAAN MODEL PEMBELAJARAN KOOPERATIF TIPE TGT (TEAM GAMES TOURNAMENTS) DAN PEMBELAJARAN KONVENSIONAL TERHADAP HASIL BELAJAR KOMPETENSI MEMAHAMI DASAR-DASAR MESIN
Journal of Mechanical Engineering Learning Vol 3 No 1 (2014)
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This study aimed to determine differences in student learning outcomes to understand the basics of competency using cooperative learning machine TGT (Team Games Tournaments) with conventional learning and to determine student learning outcomes in the competence to understand the basics of the engine between cooperative learning TGT (Team Games Tournaments) with conventional learning . This study used an experimental method with pre-test pattern post -test control group design . The population of this research were 96 students from three classes in vocational X TKR SMK Darussalam Balapulang which take competence to understand the basics of the machine. Determination of the study sample stratified random sampling technique, X TKR 1 as the experiments class and class X TKR 2 as the control class. Collecting data using methods of documentation, observation methods and test methods. Data analysis using statistical descriptions and t test. Competency learning outcomes to understand the basics of the machine in class X TKR SMK Darussalam Balapulang using cooperative learning TGT (Teams Games Tournaments) better than conventional learning.
PENERAPAN PEMBELAJARAN MODEL EXPERIENTIAL KOLB UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA KOMPETENSI MEMAHAMI DASAR - DASAR MESIN
Journal of Mechanical Engineering Learning Vol 3 No 1 (2014)
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In the observation made ​​in SMK Negeri 1 Ampelgading Pemalang , teachers still use the learning model on conventional model of learning that occurs in one direction , so the learning process ari teachers only. Issues raised in the study is that there is a difference or not between the use of Kolb's experiential learning model and conventional learning on competency models to understand the basics of the machine ? The goal is to prove judging or not there is a difference between Kolb's experiential learning model with the conventional model of learning to understand the basic competence - the base engine . In this study using experimental research designs is true experiment , because in this design the researcher controls all external variables that affect the experimental procedure used in this study is a pretest - posttest design types desaign control group . This research was conducted at SMK Negeri 1 Ampelgading . The population in this study was 5 class X class 2013/2014 . The samples used were 2 classes of class X TKR 1 number of 39 students of class X and TKR 4 number of 40 students . Class X TKR 1 as experimental class X and class 4 as a class kontrol.Penggumpulan TKR data using statistical and data analysis using the t test . Based on the analysis of data obtained that the average - average results of a study to understand the basic competence - basic engine in the experimental group were originally 51.20 into 82.82 or an increase of 71 % , whereas in the control group who initially had an average of 52 , 33 to 65.5 , or an increase of 29 % . calculation results of data analysis there is a difference between Kolb's experiential learning model with the conventional model of learning to understand the basic competence - the base engine . For teachers , the use of the application of Kolb's experiential learning can be one of the solutions and alternatives to improve student achievement.
PENINGKATAN HASIL BELAJAR DENGAN PENERAPAN MODEL PEMBELAJARAN KONSTRUKTIVISME BERBASIS MEDIA PERAGA PADA MATERI ELEKTROPNEUMATIK DALAM MATA KULIAH PNEUMATIK HIDROLIK
Journal of Mechanical Engineering Learning Vol 3 No 1 (2014)
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This study aims to determine whether there is an increase in student learning outcomes between the use of expository learning model with the model of constructivism. This study uses a quasi-experimental study with a type of pattern pretest-posttest control group design. The study population was 2013 semester of the academic year students who took the 5-Hydraulic Pneumatic course consisting of 2 classes with a number of 90 students. The samples were taken with a saturated sampling method, one class as control group numbering 40 students and one class as experimental group numbering 40 students,. The control group will be given expository teaching model, while the experimental group was given a model of constructivism. Based on the research results obtained, that the average competence elektropneumatik learning outcomes in the control group increased to 58.64 originally 77.41. In the experimental group the average results of the original study increased to 87.21 58.15.
PENERAPAN MODEL PEMBELAJARAN GROUP INVESTIGATION (GI) BERBANTUAN MODUL SEKOLAH UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA KOMPETENSI DASAR MENGGUNAKAN ALAT UKUR MEKANIK
Journal of Mechanical Engineering Learning Vol 3 No 1 (2014)
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The purpose of this action research is to increase the basic competence of learning result of the competence based using mechanical measuring devices through the application of Group Investigation (GI) learning model  assisted school modules, and to increase students learning activities. The reseach subject are students of SMK Muhammadiyah 1 Muntilan grade X TP4 year 2013/2014 with 37 students by using two cycles. Each siclus consist of 4 steps they are planning, action, observation, and reflection. The method of collecting data is using documentation, observation and test. The result of this research is there are increasement learning result of the students in basic competence using mechanical measuring devices. Based on the data analysis and content the result it self are, first, applying learning model of group investigation that helped by school module are able to increase the students learning result, it can be known from the students result of first cycle that are 61,4 become 79,3 and in second cycle with the result prosentation from first cycle that are 48,65% become 81,08% in second cycle. The second, increasing students activities from 64% in first cycle become 84% in second cycle. From this data collection method, it was known that the prosentation of the students result in basic competence by using mechanical measuring devices are 45,95% students result KKM, and that have no good result are 54,05%. After applyn the learning model GI that helped by using school module, the students learning result are increase in first cycle and second cycle , that are 48,65% in first cycle become 81,08% in second cycle. It means that the learning model type GI that helped by using school module in basic competence by using mechanical measuring devices are able to increase students learning result at SMK Muhammadiyah 1 Muntilan grade X TP4.

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