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Pengaruh Perlakuan Alkali terhadap Kekuatan Bending Komposit Berpenguat Serat Rami dengan Matrik Polyester Totok Suwanda; Muhammad Budi Nur Rahman
Semesta Teknika Vol 13, No 2 (2010): NOVEMBER 2010
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jst.v13i2.717

Abstract

The objective of this study was to determine the influence of alkali treatment on the flexural strength and failure mode of jute fiber waste/polyester composite materials. The materials being used in this research werewaste of jute fibers, polyester resin, where as NaOH and aquades were utilised for alcali treatment. Prior to being embedded into polyester resin to produce composite boards employing press printing techniques (press mold), the fiber was alkalitreated for 0, 2, 4 and 6 hours by soaking into a 28% volume NaOH content solution. Flexural test was carried out in accorcance with the ASTM D790 standard, and macrographs of selected fracture surfaces of the specimens were capturedfor analysis in oerder to determine the characteristics of the fracture surfaces. Test results showed that the longer the alcali treatment time in the lower the flexural stress and strain, but the the higher the flexural modulus. The composite without alkali treatment reluted in 70.39 MPa bending stress, 1.85% bending failure strain, and 3.85 GPa bending modulus, whereas the 6 hours of alkali treatment resulted in 51.70 MPa bending stress, 1.27% bending failure strain, and 4.13 GPa bending modulus. Composite with alkali-treatmed fiberdid not exhibite any fiber pull out, and also experienced debonding due to shear forces can’t afford retained by the resin.
Optimalisasi Tekanan Kompaksi, Temperatur Dan Waktu Sintering Terhadap Kekerasan Dan Berat Jenis Aluminium Pada Proses Pencetakan Dengan Metalurgi Serbuk Totok Suwanda
Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v9i2.873

Abstract

Powder metallurgy is one of the manufacturing processes. Upon the process, melting process is not necessary to carry out. The powder is subsequently compacted then sintered. These processes can be conducted either separately or simultaneously.  However metallurgy processes have not been commonly developed in Indonesia yet. Therefore it is necessary to carry out preliminary research that serves as a basis for developing of further process. The effect of the independent variables of the process on mechanical and physical properties of the product will be examined. The research was conducted by arranging the independent variables which consist of pressure, temperature and sintering period whereas hardness and density of product are the dependent variables.  Aluminum will be water atomized for obtaining the powder. Response surface method is used as the experimental design method.  The method can show the effect of the independent variables individually and the interaction among the variables. Data analysis will result mathematic formula showing the functional relation. The research concludes that 170 MPa compaction pressure and 500 0C sintering temperature and 40 to 50 minutes range period of sintering produces the maximum Brinell hardness number of 47 BHN. On the other hand, the effect of the independent variables to the density has not been able to be formulated. 
Kajian Komprehensif Pengaruh Perlakuan Alkali Terhadap Kekuatan Komposit Berpenguat Serat Nanas-Nanasan (Bromeliaceae) Sigit Hidayat Nuri; Totok Suwanda; Kuncoro Diharjo
Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v9i2.874

Abstract

Penelitian ini bertujuan untuk menyelidiki pengaruh perlakuan alkali (5% NaOH) terhadap sifat tarik (tegangan, regangan, modulus elastisitas) bahan komposit berpenguat serat nanas-nanasan (bromiliaceae) dengan matrik unsaturated polyester. Karakteristik penampang patahan diselidiki dengan pengamatan menggunakan foto makro. Bahan utama penelitian adalah serat nanas-nanasan kontinyu, NaOH, dan resin unsaturated polyester. Serat yang digunakan dikenai perlakuan alkali (5% NaOH) selama 0, 2, 4, 6, dan 8 jam. Pembuatan komposit dengan metode cetak tekan pada kisaran fraksi massa serat 15% - 50. Pembuatan spesimen uji komposit dan prosedur pengujiannya mengacu pada standar ASTM D 638. Hasil penelitian menunjukkan bahwa perlakuan alkali (5% NaOH) mampu menghilangkan lapisan seperti lilin di permukaan serat sehingga serat dan resin memiliki ikatan (mechanical bonding) yang kuat. Komposit yang diperkuat serat yang dikenai perlakuan alkali memiliki kekuatan yang lebih tinggi dibandingkan dengan komposit yang diperkuat serat tanpa perlakuan.  Semakin tinggi fraksi massa serat (Wf)  maka kekuatan tariknya juga semakin besar. Pada di atas 30%, kekuatan tarik paling besar terjadi pada komposit yang diperkuat serat dengan perendaman alkali selama 4 jam, dan selanjutnya disusul oleh komposit yang diperkuat serat dengan perendaman alkali selama 2 jam pada (Wf). Komposit yang diperkuat serat perlakuan alkali selama 4 dan 2 jam juga memiliki modulus elastisitas yang lebih tinggi, yaitu masing-masing 40.71 GPa dan 50.65 GPa pada Wf sekitar 38%. Jenis patahan splitting in multiple area terjadi pada komposit yang diperkuat serat dengan perlakuan NaOH selama 4 jam, 2 jam, dan tanpa perlakuan. Namun, komposit yang diperkuat serat dengan perlakuan NaOH selama 8 jam memiliki jenis patahan patah tunggal. Berhubung penampang patahan komposit yang diperkuat serat tanpa perlakuan mempunyai mekanisme kegagalan fiber full out, maka kekuatan komposit ini pun menjadi rendah karena memiliki ikatan antara serat dan matrik yang lemah.
Pengaruh Sudut Water Sprayer Dan Tekanan Air Dalam Sprayer Pump Terhadap Hasil Serbuk Alumunium Pada Proses Atomisasi Air Muhammad Budi Nur Rahman; Totok Suwanda
Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v9i2.869

Abstract

Metalurgi serbuk merupakan metode pembuatan benda-benda logam dengan menggunakan serbuk logam sebagai bahan dasar. Proses dalam teknologi metalurgi serbuk terdiri dari pembentukan serbuk, compacting, sintering dan finishing. Salah satu metode dalam pembuatan serbuk logam adalah dengan metode atomisasi air. Pembuatan serbuk dengan metode atomisasi air terdapat beberapa faktor yang mempengaruhi antara lain: sudut α (sudut tumbukan antara melting dengan butir air) dan tekanan air saat tumbukan. Penelitian ini bertujuan untuk mengetahui pengaruh sudut α, dan tekanan air terhadap optimalisasi hasil pembuatan serbuk dengan metode atomisasi air dan bentuk serbuk yang diamati dengan foto mikro. Proses pembuatan serbuk menggunakan metode atomisasi air dengan variabel bebasnya adalah sudut α yang ditentukan 30o, 40o, 50o dan 60o dan variasi tekanan air,  yaitu 25 kg/cm2, 30 kg/cm2, 35 kg/cm2 dan 40 kg/cm2. Bahan yang digunakan dalam proses atomisasi air adalah alumunium. Dalam penelitian ini diperoleh hasil bahwa sudut α dan tekanan tumbukan air pada melting mempengaruhi hasil produksi serbuk dengan metode atomisasi air. Hasil penelitian dengan variasi sudut α  diperoleh bahwa sudut  α = 30o menghasilkan produk 2,7%, sudut  α = 40o menghasilkan produk 4,05%, sudut α = 50o menghasilkan produk 3,23%, sudut α = 60o menghasilkan produk 1,8%. Penelitian dengan variasi tekanan air pada tekanan 20kg/cm2 tidak diperoleh serbuk, 25 kg/cm2diperoleh 2,9%, tekanan 30 kg/cm2 diperoleh 3,2%, tekanan 35kg/cm2 diperoleh 4,5% dan tekanan 40kg/cm2 diperoleh 2,9%. Hasil serbuk alumunium optimum secara teoritis dihasilkan pada sudut α 42,50 dan tekanan air 33,17 kg/cm2. Bentuk serbuk hasil proses atomisasi air sebagian besar adalah irregular, accicular dan flake.
Perancangan Injection Blowing Tools dengan Line Slider untuk Mesin Blow Molding dengan Kapasitas Volume 300 Ml Subkhan Nur Ikhsan; Cahyo Budiyantoro; Totok Suwanda; Adi Nugroho
JMPM (Jurnal Material dan Proses Manufaktur) Vol 2, No 1 (2018): Juni
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.2120

Abstract

Blow molding machine is a machine that used to produced plastic bottle with injection air system to blowing the soft preform (±100℃)  at 7 bar pressure of air. They are two main components in injection blowing tools i.e, injection tools to distribute the high pressure air from compressor to the bottle preform and the line sliders to make a mold cavity can moving when the injection process ongoing and finished. To build the injection blowing tools, they are several main material that use, on the line sliders use the main material of low carbon steel type A36 ( 0,25% - 0,29% C) with strip and plate with force of 360 Ksi ( 250 MPa ), and the injection tools use the main material of Aluminium-alloy 4032 (Al, Si 12,5%, Mg, Cu, Ni) because it easy to make an model or profil with reasonable price. The main material on the shafts holder injector and blow pin use stainless steel 304 with max force of 515 MPa. The process to joint between the components are applying the welding model with fillet type and average on high of the neck weld 3 mm and use electrodes of RD-260 which E6013 electrode class with maximum strength 60 Ksi and use the bolt and nuts which average from material of SS 304 with size M6 - M16. In  the process injection, the ratio of large development due to the process injection ( BUR ) is 4 with the size of a bottle preform long 99 mm thick 2 mm and diameter 26 mm.
Sifat Tarik dan Struktur Mikro Sambungan Las Gesek Tak Sejenis Baja-Tembaga Ady Ryan Romadhan; Aris Widyo Nugroho; Totok Suwanda; Romi Wilza
JMPM (Jurnal Material dan Proses Manufaktur) Vol 3, No 1 (2019): Juni
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.3133

Abstract

AbstrakTembaga dikenal memilki keunggulan sifat fisis sehingga sering diaplikasikan bersamaan dengan baja menggunakan teknik brazing yang membutuhkan filler. Friction welding memberikan alternatif penyambungan tak sejenis tanpa filler dan asap. Penelitian ini dilakukan untuk mengetahui efek tekanan gesek terhadap sifat mekanis sambungan las gesek pada sambungan dissimilar baja-tembaga. Silinder tembaga dan baja dibubut menjadi bentuk setengah bagian dari benda uji standar JIS Z 2201. Proses pengelasan dilakukan pada putaran 1000 rpm dengan variasi tekanan gesek sebesar 30, 35, dan 40 MPa dengan tekanan tempa 80 MPa. Waktu gesek dan waktu tempa masing-masing 5 detik. Hasil penyambungan masing-masing diamati struktur mikro, kekerasan dan sifat tariknya.  Hasil penelitian menunjukkan bahwa dengan meningkatnya tekanan gesek maka daerah TMAZ melebar. Struktur mikro berbutir halus teramati di bagian baja, sedangkan di daerah tembaga, orientasi butir berubah memanjang searah dengan permukaan sambungan. Pada daerah termomechanically affected zone (TMAZ) dan welding center zone (WCZ) kekerasan masing-masing logam turun seiring dengan kenaikan tekanan gesek. Lebar daerah TMAZ yang cukup membuat kekuatan tarik tertinggi diperoleh dari spesimen dengan variasi 35 MPa sebesar 89 MPa. Metode las ini dapat digunakan untuk penyambungan logam tak sejenis baja-tembaga dengan memperhitungkan luasan daerah TMAZ. AbstractCopper is often used along with steel due to it excellence properties by using brazing technique. Friction welding technique offers an alternative technique for joining dissimilar metal without fillers and smoke. This research purpose is to study the effect of the friction pressure on the mechanical properties of steel-cooper friction welded joints. Copper and steel bars were turned into half the shape of the specimen according to JIS Z 2201. The welding process was carried out at a speed of 1000 rpm with the friction pressures of 30, 35, and 40 MPa under an upset stress of 80 MPa for 5 seconds of friction time and upset time. The results showed that with increasing friction pressure the TMAZ area was widened in fine grained microstructure for the steel region. Whereas in the copper region, the orientation of elongated grains inline with the direction of the joining surface. In the TMAZ and WCZ areas the hardness of each metal decreases with increasing friction pressure. The sufficient width of the TMAZ results in the highest tensile strength of 89 MPa. It was obtained from the specimens with friction pressure of 35 MPa. This welding method is potentially used for dissimilar steel-copper joint by considering the area of the TMAZ region.Keywords: Friction welding, dissimilar metals joint, pressure friction, TMAZ
Disain dan Pembuatan Alat Preheat Induksi pada Pengelasan Gesek Logam Dissimilar Reza Taufikur Rahman; Aris Widyo Nugroho; Totok Suwanda
JMPM (Jurnal Material dan Proses Manufaktur) Vol 3, No 2 (2019): Desember
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.3240

Abstract

Pengelasan gesek diketahui memiliki keunggulan mampu menyambung dua logam yang berbeda (dissimilar). Meskipun demikian, pengelasan ini masih mengalami kesulitan dalam proses penyambungan karena perbedaan titik lebur dari kedua logam yang disambung. Agar perbedaan suhu pada daerah yang bergesekan tidak terlalu besar, perlu dilakukan pemanasan awal /preheat pada logam dengan titik lebur yang lebih tinggi. Tulisan ini membahas disain dan pembuatan mesin preheat induksi pada las gesek logam dissimilar. Pemanas induksi yang digunakan adalah prinsip-prinsip arus eddy dengan frekuensi tinggi. Mesin preheat induksi ini terdiri atas komponen utama yaitu transformator, diode, transistor mosfet, kapasitor, kumparan kerja, induktor, dan resistor. Kumparan kerja terbuat dari pipa pejal tembaga berdiameter 5 mm, jumlah lilitan, n = 6 lilit dengan tinggi kumparan 35 mm dan diameter lilitan 40 mm. Setelah terangkai, dilakukan pengujian pada silinder pejal stainless steel berdiameter 14 mm dan panjang daerah pemanasan 30 mm. Pemanasan dilakukan sehingga silinder mencapai temperatur 600 °C. Termokopel tipe K digunakan untuk mengukur temperatur silinder. Hasil pengujian menunjukkan bahwa mesin memiliki spesifikasi berupa tegangan kerja rangkaian 20 Volt dan arus maksimal 44 ampere. Temperatur naik dengan cepat hingga 600 °C setelah 70 detik pertama kemudian naik sedikit dan stabil sampai dengan maksimum temperatur 683 °C dengan waktu pengujian sampai dengan 300 detik. Daya listrik berkisar antara 320-674 watt. Hasil ini menunjukkan bahwa mesin preheater telah berhasil dibuat dan berpotensi dapat digunakan sebagai preheater pada proses las gesek dissimilar. Friction welding is known to have the advantage of being able to connect two different metals (dissimilar). However, this welding is still experiencing difficulties in the joining process because of the different melting points of the two metals being joined. In order the temperatur difference in the rubbing area is not too large, it is necessary to do preheat the metal with a higher melting point. This paper discusses the design and manufacture of induction preheat machines in dissimilar metal friction welding. Induction heaters are applied using the principle of eddy current with high frequency. This induction preheat machine consists of main components namely transformer, diode, mosfet transistor, capacitor, working coil, inductor and resistor. The working coil was made of solid copper pipe with a diameter of 5 mm, number of turns, n = 6 turns with coil height of 35 mm and diameter of coil of 40 mm. After being assembled, testing was carried out on a solid stainless steel cylinder with a diameter of 14 mm and a length of 30 mm heating area. The heating process was conducted to achieve temperatur of the higher than 600 °C. A K type thermocouple was used to measure the temperatur. The test results showed that the machine had specifications as follows: a 20 Volt circuit working voltage, with a maximum current of 44 amperes. Temperatur rose rapidly up to 600 °C after the first 70 seconds then increased slightly and was stable up to a maximum temperatur of 683 °C during 300 seconds. Electrical power ranged from 320-674 watts. These results indicated that the preheater machine was successfully fabricated and was potentially be used as a preheater equipment in the dissimilar friction welding process.
OPTIMALISASI PRODUKSI KERIPIK TALAS DAN KERIPIK PISANG DI DUKUH CEKEL JETIS SAPTOSARI GUNUNG KIDUL Totok Suwanda; Krisdiyanto Krisdiyanto; Nur Ardiyansyah; Fitroh Anugrah Kusuma Yudha
Ekalaya: Jurnal Pengabdian Kepada Masyarakat Indonesia Vol. 2 No. 1 (2023): Ekalaya Journal
Publisher : Nindikayla Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (279.228 KB) | DOI: 10.57254/eka.v2i1.38

Abstract

The Community Partnership Program has a targeted community of Cekel artisans of taro chips and banana chips. The partners involved are banana chip business actors (Cakrawala All-Business Cooperative) and taro chips business (Zahra) in Cekel, Jetis Saptosari Gunung Kidul. The problems found in partners are slicing fried foods for too long and not optimal, banana mixes are not safe, knowledge of product variations is limited. The solution that can be done is product management counseling that will ensure the quality of handling banana chips and taro chips products. The provision of production equipment assistance will facilitate and speed up work so as to increase productivity. Taro stripping using a double blade, plowing using a chopper machine, slicing using a spinner. Production increased, sales increased. Increased production and sales will improve well-being. Increased insight and additional knowledge of diversification of processed banana, cassava, and peanut products. There is a transfer of technological innovations so as to increase the pace of production, product quality and work safety. There is an increase in the production rate occurring in the slicing process which originally took 30 minutes to 2 to 3 minutes. The improvement of product quality occurs by draining the oil of natural slicing residue using a spinner. Work safety is improved by avoiding oil splashes on the hands during banana plowing
PENGUATAN KAPASITAS PENGELOLA BANK SAMPAH LOHJINAWI MELALUI PELATIHAN DAN PEMBUATAN PAVING BLOCK DARI SAMPAH PLASTIK Fitroh Anugrah Kusuma Yudha; Totok Suwanda; Ahmad Janan Febrianto; Nur Ardiyansyah; Aditya Kurniawan
Jurnal Abdimas Bina Bangsa Vol. 4 No. 1 (2023): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v4i1.408

Abstract

The Lohjinawi Garbage Bank is a waste management institution in Indonesia that aims to reduce the amount of waste that ends up in landfills. The Lohjinawi Garbage Bank has been operating for several years, but still needs the strengthening of its management capacity. One way to strengthen the management capacity of the Lohjinawi Garbage Bank is through training and making paving blocks from plastic waste. Training will be conducted for the management and members of the Lohjinawi Garbage Bank in terms of sorting and processing plastic waste into raw materials for paving blocks. This training will provide an understanding of techniques and processes for processing plastic waste, as well as techniques for making quality paving blocks. In addition, the training will also provide an understanding of the marketing and management of the paving block business. After the training, paving blocks were made from processed plastic waste. The resulting paving blocks will be used to build parking areas and roads around the Lohjinawi Garbage Bank environment. Apart from that, paving blocks can also be sold to increase the income of the Lohjinawi Garbage Bank. With training and making paving blocks from plastic waste, it is hoped that the Lohjinawi Garbage Bank can strengthen its management capacity and increase its business income. In addition, using paving blocks made from plastic waste can also reduce the amount of plastic waste that ends up in landfills and reduce the use of conventional building materials that are not environmentally friendly
Comparison of Tool Wear Rate of Insert Lathe TNMG160404-MA and TNMG160404-TF Totok Suwanda; Nur Aji Wijayanto; Nur Ardiyansyah
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 21, No 1 (2023): December 2023
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v20i2.22824

Abstract

Lathe machines are used to work on cylindrical objects. Tool wear is often a problem in the turning process and impacts the results of the machining process. The research aims to compare lathe insert tool wear levels TNMG160404-MA and TNMG160404-TF. The research used the experimental method directly using a lathe with variable machining on feeding (f) 0.04 mm/rev and 0.08 mm/rev, spindle (n) 540 rpm, and depth of cut (a) 4 mm. Tool wear was measured using an optical microscope by measuring the maximum edge wear on the tool (VBmax) and to determine the significance of tool wear using statistical analysis. The results showed wear level insert tool of TNMG160404-MA at a feeding of 0.04 mm/put an average of VBmax = 85.00(μm) and a feeding of 0.08 mm/put VBmax = 63.23(μm). TNMG160404-TF insert tool wear at 0.04 mm/put feed VBmax = 76.18(μm) and 0.08 mm/put feed VBmax = 58.43(μm). On a feeding, 0.08 mm/put motion, the standard deviation (s) of the TNMG160404-MA insert tool is 16.2, and the standard deviation (s) of the TNMG160404-TF insert tool is 17.8. On a feeding of 0.08 mm/rev, the results of t-count = 0.630 and t-table = 2.101, so t-count < t-table (0.630 < 2.101), the statistical analysis results using the t-test showed no significant difference in the level of wear of the two types insert tools. 
Co-Authors Adi Nugroho Adi Purnama Adi, Rahmad Kuncoro Aditya Kurniawan Aditya Kurniawan Ady Ryan Romadhan Agung Astuti Ahmad Janan Febrianto Ahmad Muslim Ardiyansyah, Nur Arifin Arifin Aris Widyo Nugroho Asmara, Muhammad Rafi Astuti, Agung Azhar, Chusnul Azizah, Aulia Fitri Nur Azmi, Azhim Asyratul Bambang Riyanta, Bambang Bayu Satriya Wardhana Budiantoro, Cahyo Budiyantoro, Cahyo Cahyani, Isma Afdwi Deny Fajrur Ramdani, Deny Fajrur Diharjo, Kuncoro Dwi Saputra, Muhammad Rifai Dwi Saputra, Muhammad Rifai Eko Syaifudin Febriansyah, Albyan Windra Fitroh Anugrah Kusuma Yudha Gilang Joy Habib Ramdhan Hadi Prayitno, Hadi Hakim, Moh. Hari Widada, Hari Ikhsan, Subkhan Nur Imam Crespo Padilah Imbaraga, M. Rafiudin Iswanto Iswanto Jannah, Meyriska Julianto, Achmad Zamhari Krisdiyanto, Krisdiyanto krisdiyanto, krisdiyanto Kuncoro Diharjo Kuncoro Diharjo Kusnindyasita, Anisa Muh Budi Nur Rahman, Muh Budi Nur Muhajir Muhajir, Muhajir Muhammad Budi Nur Rahman Muhammad Budi Nur Rahman, Muhammad Budi Muhammad, Bagja Restu Muhammad, Bagja Restu Muhtadi Muhtadi Mujiyana Mujiyana Mulyanti, Amelia Nur'afni Muniib, Abdin Nugroho, Ahmad Restian Adi Nur Aji Wijayanto Nur Ardiyansyah Nyeleker, Kerkulah P Pradana, Benanta Ogi Prasetyo, Satria Iman Puspitasari, Alfina Dwi Rahman, Khukuh Aulia Rahman, Muh Budi Nur Rahman, Muhammad Budi Nur Rahman, Muhammad Budi Nur Rahman, Reza Taufikur Ramdani, Deny Fajrur Reza Taufikur Rahman Rifki Febriansah Riza, Eduar Iqbal Romadhan, Ady Ryan Romi Wilza S. Sudarisman Sabtanti Harimurti, Sabtanti Santosa, Tito Hadji Agung Septian Aldo Serena Serena, Septian Aldo Sigit Hidayat Nuri Sigit Hidayat Nuri, Sigit Hidayat Sosiati, Harini Subkhan Nur Ikhsan Suminto, Joko Sunardi, Sunardi Syahputra, Koko Nusyi TH Adi Nugroho Tri Yulianto Trisnani, Wenny Nur Wahyudi, Wahyudi Wilza, Romi