Ahmad Yahya TP
Lampung University

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PEMBUATAN SISTEM ROBOTIKA SEBAGAI IMPLEMENTASI PERGERAKAN KAMERA SECARA AUTONOMOUS Dimas Kusuma Putra; . Martinus; Ahmad Yahya TP
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
Publisher : Jurnal Ilmiah Teknik Mesin

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Automation systems are a manifestation of the concept of science that led to development of nowadays technology. In general automation is concept of human science that is used to run a process where there is no longer direct human intervention ranging from the beginning of the process until completion. This research is intended to create a automated a robotic system camera pan and tilt movements with a view to be implemented into a variety of forms of applications, such as KAP (Kite Aerial Photography), security camera, stealth cam, camera traps and etc. This research uses some mechanicsm of rigging as a medium for system the camera Arduino microcontroller is used as the controller of the controlling the camera movement. The system of controlled the movement of the camera by using time delay. The results showed that the robotics system of this research has succeeded in making a camera capable of autonomous moving to state time delay. Keywords: Microcontroller, Robotics Systems, Camera Movement.
Aplikasi Udara Dingin Vortex Tubepada Pembubutan Baja ST 41 Menggunakan Pahat HSS Henddy Purnomo; Gusri Akhyar Ibrahim; Ahmad Yahya TP
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
Publisher : Jurnal Ilmiah Teknik Mesin

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Pahat merupakan komponen utama dalam proses pemesinan selain mesin bubut dan benda kerja. Umur pahat merupakan suatu data pemesinan yang sangat penting dalam perencanaan pemesinan. Vortextube merupakan alat yang dapat memisahkan aliran udara yang bertekanan menjadi udara panas dan dingin. Dalam penelitian ini pengaruh kecepatan potong, gerak makan, dan kedalaman potong terhadap keausan pahat yang digunakan akan diteliti. Metode Taguchi digunakan menganalisa faktor yang paling berpengaruh signifikan terhadap keausan. Pada penelitian ini akan dianalisis secara kualitatif (grafik) dan kuantitatif (statistic) dengan metode analisa varian (ANOVA). Dalam penelitian ini, proses pembubutan menggunakan pahat HSS dan material benda kerja baja ST 41. Dalam proses pengujian, gerak makan (f) yang digunakan adalah 0,09 mm/rev, 0,12 mm/rev,0,18 mm/rev, sedangkan kecepatan potong (v) yang digunakan adalah 58,72 mm/min, 86,35 m/min, 113,25 m/min dan untuk kedalaman potong (a) 1,0 mm, 1,5 mm, 2,0 mm. Udara  dingin vortextube yang sudah ada dilakukan pada penelitian sebelumnya yaitu suhu 15º dan tekanan udara 5 bar/psi. Dari analisa varian  yang dilakukan, kecepatan potong memiliki pengaruh signifikan terhadap keausan pahat. Kondisi parameter pemesinan yang optimal diperoleh pada kecepatan potong (v): 58,72, gerak makan (f) 0,09 mm/rev dan kedalaman potong (a) : 1,0 mm dengan umur pahat mencapai 139 menit. Laju keausan tepi pahat semakin meningkat dengan bertambahnya kecepatan potong. Dari analisa  S/N ratio  diperoleh parameter pemesinan yang memiliki pengaruh signifikan terhadap keausan pahat adalah  kecepatan potong  dengan nilai kontribusi  = 0,024  karena tidak melebihi > 0,05. Kata Kunci : keausan pahat, Metode Taguchi, baja ST 41, pahat HSS, kecepatan potong
PERENCANAAN PROSES TUNGKU PENGERING KOTORAN HEWAN TERNAK Cholyan Perwira; Yanuar Burhanuddin; Ahmad Yahya TP
Jurnal Ilmiah Teknik Mesin Vol 2, No 1 (2014)
Publisher : Jurnal Ilmiah Teknik Mesin

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Most welding shops in the area Pringsewu District in carrying out the work are still using a system  that is not working or is not systematically planned, which is why most welding shops suffered many losses, such as product processing time is longer, the cost of production incurred greater and workmanship unsatisfactory. Of the shortcomings and weaknesses of the system working in most welding shops in the Pringsewu District, it is necessary to study the process planning , which is applied in the manufacture of livestock manure dryer furnace in the manufacturing  process in a small welding shop. This study aims to make a good process planning that can be applied to the world of entrepreneurship, especially welding shop. The research was conducted at the welding shop at Pringsewu district in January-March 2013. Making the process planning begins with the creation of images 2dimensional furnace consists of 4 major components, namely cones, combustion chamber, body coatings, and disposal space. Procedures sheets gained as much as 11 pieces that serve to minimize material and wasted time . Calculation time of making the furnace obtained through primary and secondary data collection  that results in two sketches workplace assembling component parts, 41 pieces of the map left and right hand and 8 pieces of the process flow map. The resulting time using MOST (Mynard Operation Sguence Technique) is equal to 57.8757 hours divided by 8 hours of working time in 1 day = 7.2344625 days or ± 8 days. The total estimated cost of production based on direct costs, indirect costs, and overhead costs for Rp.8.345.300Keywords : Process planning, Furnace, Procedures sheet, MOST