In this study, cellulose nanocrystals (CNC) was prepared and meso-tetrakis(4-nitrophenyl)porphyrin (TNPP) was immobilized on it. The product was identified by techniques of UV-Vis, fourier transform infrared (FT-IR), diffuse reflectance UV-Vis spectroscopy (DRS), energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM). The effect of an amount of a loaded porphyrin comp...

Perkembangan program Computer Numerically Controlled (CNC) Milling menggunakan simulasi sangat membantu proses pembuatan suatu produk dalam mengurangi kesalahan operator dan yang dibuat sesuai dengan gambar tekniknya. Mesin CNC bekerja untuk memotong membuat benda kerja merujuk ke 3 sumbu yaitu X, Y Z. Kesalahan pemasukan berupa pemosisian Y, Z dapat menyebabkan karakteristik geometrik tidak te...

Intelligent knowledge based system (IKBS) is developed for optimizing dry CNC turning process using Taguchi method, CNC Machine, EN19 steel as the work piece material, andCutting Insert. Tool wear and spindle loading which are the machining parameters, spindle speed, feed rate, and depth of cut, areoptimized through the intelligent knowledge based system (IKBS). The experimental CNC turning mac...

The paper dealt with basic approaches of intelligent systems implementation in manufacturing processes diagnostics of CNC machines. There are several approaches such as either the usage of external or internal intelligent systems. The goal of implementation is the control of manufacturing process in order to influence the examined process quality and economy. The present development in field of...

We observed the ROSAT-selected eclipsing dwarf nova GY Cnc (=RX J0909.8+1849) during the 2001 November outburst. We refined the orbital period to be 0.17544251(5) d. The fading portion of the outburst was indistinguishable from those of typical dwarf novae with similar orbital periods. However, the signature of orbital humps (or a hot spot) was far less prominently observed in the orbital light...

The paper describes the application of an expert system to develop the carbide cutting tools selection system for computer numerical control (CNC) lathe machine. The aim of the development is to select the optimum tool holder, carbide cutting tools, insert, feed rate, and turning speed for CNC lathe machine. The system is able to select the suitable tips tool based on the dimension, machining p...

Reconfigurable logic has gained relevance in high-speed computer numerical control (CNC) digital controllers where high processing speed at the servo loop update time is critical. Reconfigurable devices like field programmable gate array (FPGA) have advantages over microprocessors and DSP with similar logic complexity because their open architecture makes them suitable for system on-a-chip appl...

In practical machining, the multi-axis actual dynamic performances don’t match well, which reduces the profile precision greatly. The computer numerical control (CNC) machine tools contour error coupled-control strategy based on line interpolation and curve interpolation is developed in the paper. After analyze the conventional CNC contour error control scheme, put forward the contour error cou...

(Adaptive Control Constrains (ACC) as applied to machine tool systems refers to the regulation of the cutting process characteristics such as spindle power, cutting force etc., by varying the only changeable process parameters which are feedrate and cutting speed. Even a simple ACC system, as in this case, in which the cutting force is regulated by changing the feedrate, is quite complex. Exper...

Although current rapid prototyping methods have had a significant impact on product and process design, they are often limited in both accuracy and choice of suitable materials. Also, the current methods share little similarity to typical manufacturing processes. In this paper, a method for using CNC machining as a Rapid Prototyping process is described in order to exploit the creation of funct...