3D printing technology has great potential in today's manufacturing world where one of its uses is in the prototype of a product. One of the most famous and inexpensive 3D printing technologies is the Fused Deposition Modeling (FDM) method. Many studies have been carried out using this FDM method.
In this study, the printing of motorbike light relay boxes was carried out using the FDM method with two variations of speed, temperature and infill of each mass. 3D Printing uses a nozzle diameter of 0.4 mm and a work table temperature of 60oC and a height of 0.2 mm for each layer with support every where. From the research results, all the products produced have a rough surface with a level of geometric accuracy ranging from 0.91% for the length dimension and 7.73% for the width dimension of the product.
The present study aimed at identify population characters pollution source which affect water fertily nitrate, phospate, abundance as well as community structure of planctonic diatomae were measured. Nine sampling station of three location were established a long the Selat Air Hitam water. Appearently domestic activity, marine traffic, sago processing plant and community economic had affected on water fertility due to effluent water that entered the water. Nitrate analysis showed a range of 187,5 to 262,5 µg/L mean while phospate consentration appear 28,8- 241,2 µg/L, silicate consentration appear 30,4-32,9 µg/L. Plactonic diatomae abundance came up 2400 to 3800 cell/L of nine genera. Biodiversity index of range (1≤H’≤3), while smiliarity index (0,5≤E≤1) and dominancy index (0,5≤E≤1). Those index indicate nthe Selat Air Hitam waters in a medium pressure, however ecosystem condition is stable. Nitrate, phospate and silicate positively and significantly correlated with diatomae abundance ( p0,05). TSS level appeared 18,33 – 45,00 mg/l and BOD berkisar 3,73 – 5,07 mg/l. Regression analysis showed that nitrate and phospate had a mayor affect to diatomae abundance.
An experiment has been conducted to determine the amount of deformation energy and energy per volume needed for the design of coconut oil press machines. By using a press tube with a diameter of 59 mm and by varying the load of press and speed of press the results obtained that to produce the optimal average volume of coconut oil are at the pressure load of 40 KN and the pressure rate of 6 mm / minute. The ideal energy per volume used to suppress coconut oil press machine is 6.106 J / m3.
This project is a part of the analysis which aims to find solutions to the kinematics problem that exists in the movement of the robot arm. In order to control the robot manipulator as desired, so it is important to consider kinematics models in the design of control algorithms. Which in this report presents a mathematical model and kinematics parameter for the robot kinematics. The solution of the forward kinematics based on the matrix transformation method are given and the results are obtained using Matlab software.
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