A study of frequency and pulses for stepper motor controller system by using programmable logic controller

The stepper motor movement process produced different frequency and pulses. This research explained about the frequency and pulses for the stepper motor movement by using Programmable Logic Controller (PLC) as research method. The study was done to find the suitable frequency and pulses for stepper motor movement by developing a prototype stepper motor controller system. The pulse frequency used did not affected the distance of moving load in the stepper motor operations. The increasing number of pulse frequency only will affect the time taken for the stepper motor to complete its operations. The result showed that number of pulse frequency at high operation was 5000 Hz. Pulse number reacted as a manipulated variable that affected both factor which is time taken of stepper motor operation and the distance of moving load

Mechanical behaviour and compatibility analysis of thermoplastic polyurethane polycaprolactone-based new fused deposition modelling filament composite

The investigation focuses on the development of a Thermoplastic Poly Urethane(TPU), and Polycaprolactone (PCL) based new flexible polymer composite fused deposition modelling (FDM) filament feedstock. In this research study, the mechanical behaviour of the new polymer composite material is fabricated by injection moulding and tested. The mechanical behaviour of injection moulded TPU/PCL composite samples with various blend formulations was investigated experimentally using several mechanical testings. Several combinations of the blend formulations for the new TPU/PCL flexible feedstock was done by volume percentage (vol. %). Based on the experimental data obtained from the mechanical testing done which is the hardness and tensile of the new polymer composite of TPU/PCL has a high potential to be fabricated as the flexible filament feedstock. The blend ratio of 80:20 which as a medium hardness and a higher tensile strength proved to be a highly potential choice to be fabricated as the flexible filament feedstock. The research resulted in the success of extrusion of 1.75 mm of flexible filament for all three ratios of composites and testing it in FDM machine

Emerging Natural Fiber-Reinforced Cement Materials and Technology for 3D Concrete Printing: A Review

Additive Manufacturing (AM) technology has been widely used in various industries like automotive, manufacturing and construction. The application of AM technology in the construction industry is a chance of significant improvement and advancement for constructing processes. AM is consist of creating layer by layer of slices to print 3-dimensional (3D) construction parts. In this regard, along with the technology and process of 3D printing in construction; many researchers worked on different materials included natural fibre reinforced cement for the 3D construction advancement. On such, the review has been done for 3D printing technology, process, latest machinery for construction, the construction flow process and emerging materials for 3D construction. For this, the most recent and critical research work since last 8-years was highlighted and argued. Different research articles and numerous latest reports from web blogs are used for furnishing this review work. Based on the review, few research gaps are discovered. Finally, the use of 3D printing in the construction industry depends on the accuracy of the printing job. Not only that, the availability of printing materials and the cost of the printing process and the time taken to print also become the factors in the technology revolution in the construction industry

Flexural properties of copper-ABS in metal injection molding process for FDM feedstock

This paper aims to investigate the flexural strength and hardness of acrylonitrile butadiene styrene (ABS) and five different samples of copper filled in ABS parts made by injection molding process for fused deposition modeling (FDM) feedstock wire. In this study, the effect of copper powder was investigated as a filler material in polymer matrix composite (PMC) and ABS was chosen as a matrix material. The detailed formulations of compounding ratio by weight percentage with various combinations of the new PMC are investigated experimentally. Based on the result obtained, it was found that, increment of 71% to 75% copper filler affected the flexural strength, and hardness values. The highly filled copper content in ABS composites increases the mechanical properties and density of PMC material through the injection molding process. The potential of development of a new composite material with metal loading in the PMC will be explored for the FDM rapid prototyping process

V sicules et v sicules polym riques Caract risations et applications

SIGLEBSE B225637Q / UCL - Université Catholique de LouvainBEBelgiu