Computer numerical control Research Papers (original) (raw)

Top Papers
Most Cited Papers
Most Downloaded Papers
Newest Papers
People
- by
- •
- Engineering, Flexible Manufacturing, Software Development, Computer Aided Manufacturing
- by richard quintero
- •
- Engineering, Software Development, System Design, Control system

Servomotors are widely used in computerized numerically controlled (CNC) machines, hence motion control is a major topic covered in undergraduate/graduate engineering courses. Despite the fact that several syllabi include the motion dynamics topic in their courses, there are neither suitable tools available for designing and simulating multi-axis motion control nor an efficient link between theory and practice. This paper proposes an educational, open-source tool for teaching motion dynamics in multi-axis servomotor control. The tool allows students to generate multi-axis motion and export these movements for their application to a CNC machine. A simulation module is embedded for evaluating the controller performance. The proposed educational tool allows the use of the inductive pedagogic method to support student learning. Eleven lab practicals are described to show how the proposed tool can be utilized for the systematic teaching of motion dynamics.

- by Gerardo Osornio
- •
- Engineering, Education, Open Access, Motion control

Parameter kecepatan putaran dan kecepatan potong mempengaruhi kekasaran permukaan dalam proses pembubutan. Tujuan Penelitian ini mengetahui perbandingan tingkat kekasaran permukaan yang dihasilkan dari parameter kecepatan putaran tetap dan kecepatan potong tetap. Metode penelitian ini adalah penelitian eksperimen, dengan melakukan proses pembubutan bertingkat pada spesimen baja ST 37 di mesin NC PU 2A EMCOTURN 120. Jumlah spesimen sebanyak 6 spesimen, setiap spesimen dibubut bertingkat sebanyak 3 tingkat, setiap satu tingkat diuji sebanyak 3 titik kualitas permukaanya menggunakan “Surface Tester Mitutoyo SJ-201P”. Hasil penelitian dianalisis menggunakan statistik deskriptif dengan mengambil nilai rata-rata dari kedua parameter. Berdasarkan analisis data dari hasil penelitian yang dilakukan, kekasaran permukaan yang dihasilkan menggunakan kecepatan potong tetap (G96) lebih baik dibandingkan kecepatan putaran tetap (G97). Kecepatan potong tetap lebih stabil saat melakukan pemotongan dalam pembubutan bertingkat.

Tugas Kuliah - Teknik Produksi dan Pemrograman NC

- by Asrul Adam
- •
- Computational Intelligence, Swarm Intelligence, Routing, Particle Swarm Optimization

Tugas Kuliah - Teknik Produksi dan Pemrograman NC

- by Defindo Efendi
- •
- Tugas kuliah, Computer numerical control, Lathe Machine, laporan pratikum cnc

Tugas Kuliah - Teknologi Produksi dan Pemrograman NC

This paper describes an integrating hardware and software ensemble for the development of microcontroller-based computer numerical control system. The discuss is focused on design and implementation of the communication between the PC and a numerical control machine. Among topics covered are: the C#/.NET serial port programming, and further, how to create a Windows application for sending, trough a COM port, the Computer Aided Design/Manufacturing data needed by a numerical control machine. A PIC microcontroller-based communication hardware module was developed and tested.

- by Dimitrios Manolakos and +3
- •
- Process Control, Product Model, Profitability, Process Modelling

This essay revisits a chapter in the history of the design and production of early computers in Italy. It looks at the creation of the Olivetti Elea 9003 and the company's manufacturing of numerically-controlled machine tools in order to examine their effect on transforming traditional modes of production. these machines, along with their theorization by writers and artists, brought about a new strategy of design - parametric thinking - to Olivetti designers. With these changes, members of the Workerist movement began to theorize the changing role of the factory worker, and discovered that the design and engineering of Olivetti computers and NC machines generated a new type of worker called 'the technician.' This essay illustrates the connection between the Olivetti designers and engineers who created these machines and the design of the new type of labor these new machines conjured. All of these events and characters converge around one of the major industries in Italy at the time: the Olivetti company.

- by AnnMarie Brennan
- •
- History of Technology, CNC Machine tools programming, Operaismo, Italian Design

Parameter kecepatan putaran dan kecepatan potong mempengaruhi kekasaran permukaan dalam proses pembubutan. Tujuan Penelitian ini (1) Mengetahui tingkat kekasaran permukaan benda kerja menggunakan kecepatan putaran tetap (G97); (2) Mengetahui tingkat kekasaran permukaan benda kerja menggunakan kecepatan potong tetap (G96); dan (3) Mengetahui perbandingan tingkat kekasaran permukaan yang dihasilkan dari kedua parameter tersebut.
Metode penelitian ini adalah penelitian eksperimen, dengan melakukan proses pembubutan bertingkat pada spesimen Baja ST 37 di mesin NC PU 2A EMCOTURN 120. Jumlah spesimen sebanyak 6 spesimen, setiap spesimen dibubut bertingkat sebanyak 3 tingkat, setiap tingkat diuji sebanyak 3 titik kualitas permukaanya menggunakan “Surface Tester Mitutoyo SJ-201P”. Data hasil penelitian diolah menggunakan statistik deskriptif dengan mengambil nilai rata-rata dari kedua parameter.
Berdasarkan analisis data dari hasil pengukuran yang dilakukan, maka diperoleh harga rata-rata kekasaran permukaan dari ketiga spesimen menggunakan parameter kecepatan potong tetap yaitu 2,1492 μm masuk pada kelas N7, sedangkan saat menggunakan kecepatan putaran tetap rata-rata kekasaran permukaan dari ketiga spesimen yaitu 2,4125 μm masuk pada N8. Parameter kecepatan potong tetap (G96) lebih bagus dibandingkan kecepatan putaran tetap (G97) dalam proses pembubutan bertingkat pada mesin NC PU 2A.

- by Defindo Efendi
- •
- Surface Roughness, Comparison, Computer numerical control, Cnc Turning

This paper presents EyePaint, a system that enables hands-free painting on canvas via webcam-based gaze estimation software, a custom graphical user interface (GUI), and a computer numerical control (CNC) modified for painting. The proposed system's primary use is to assist a user with a physical disability in painting on canvas. Gaze estimation is administered using only a webcam through a unique combination of object detection algorithms, like Haar cascades, to localize facial features and learned linear regression models to translate facial features to gaze location. The custom GUI allows a user to draw a line or a circle in four different paint colors on a virtual canvas before committing their shape to a physical canvas solely through using the lowaccuracy webcam-based gaze estimation. The system and its prototype are found to have utility through basic acceptance and system testing, but the chosen gaze estimation solution is generally too low accuracy for a positive user experience.

This study presents a new suction-type, pneumatically driven microfluidic device for liquid delivery and mixing. The three major components, including two symmetrical, normally closed micro-valves and a sample transport/mixing unit, are integrated in this device. Liquid samples can be transported by the suction-type sample transport/mixing unit, which comprised a circular air chamber and a fluidic reservoir. Experimental results show that volume flow rates ranging from 50 to 300 μl/min can be precisely controlled during the sample transportation processes. Moreover, the transport/mixing unit can also be used as a micro-mixer to generate efficient mixing between two reaction chambers by regulating the time-phased deformation of the polydimethylsiloxane (PDMS) membranes. A mixing efficiency as high as 98.4% can be achieved within 5 s utilizing this prototype pneumatic microfluidic device. Consequently, the development of this new suction-type, pneumatic microfluidic device can be a promising tool for further biological applications and for chemical analysis when integrated into a micro-total analysis system (μ-TAS) device.

- by Weng Chen-hsun
- •
- Microfluidics, BioMEMS, Nanotechnology, DNA
- by Ernesto Lo Valvo
- •
- Engineering Education, Simulation, Computer numerical control

The evolution of semiconductor manufacturing was very much driven by precision control demands in the United States military but because of its complementary and enabler properties it is increasingly diffusing into the manufacture and use of many different products and processes. It is therefore very common to find semiconductor chips driving central panel control systems in the manufacture of steel

- by Rajah Rasiah
- •
- Semiconductor Manufacturing, Human Capital, Control system, Scale Economies
- by Sen Thamizan
- •
- Distributed Computing, Intelligent Control, System Integration, Computer Software

The current standard programming of machine centers is still the (ISO 6983-1) standard, known as G-code, which was developed in the 1950s. This language contains low-level information performing the movement of the tool in the machining process, making it difficult for the operator to take decisions in machining. For this reason, the (ISO 6983-1) standard currently limits significantly the flexibility and interoperability part manufacturing. Given this scenario, in the 1990s a new data model for manufacturing processes was proposed to extend the STEP standard (ISO 10303-1), called STEP-NC (ISO 14649-1 standard), which was developed as a result of numerous projects by companies and universities. In this paper we describe the development and validation of software and hardware that allows the user to command a CNC gantry milling machine so that it will machine parts using the STEP-NC standard (ISO 14649-11). STEP-NC is based on the concept of workingsteps, machining features and machining operations, among other entities described by the standard (ISO 14649-1). The STEP-NC Controller software was developed using the Java programming language, which enabled the creation of a control interface for the CNC milling machining process. Programming compliant with the RS-274 standard (G and M codes) generated by the open source software GRBL (software and control movements on machines) was used to program the Arduino MEGA2560 microcontroller in the C programming language. G-code programming was removed from GRBL in order to make room for use of the STEP-NC standard (ISO 14649-1), thus allowing the physical file p21 (a part of the STEP standard) to be interpreted and sent to the axes of the CNC milling machine. A direct connection is established between the STEP-NC Controller and a board with 8 relays to allow the CNC milling machine to work selectively (either with G and M code or STEP-NC). Remote operation of the machine via the Internet was also implemented, allowing the sending of a p21 file via web, and the machining process can be monitored via webcam.

- by João Ferreira
- •
- Machining, The Internet, Computer numerical control, STEP-NC
- by Matthieu Rauch and +2
- •
- Computer Aided Design, computer Integrated manufacturing, Business and Management, Manufacturing Engineering
- by Rohit Sinha
- •
- English language, Machine Translation, Speech Acoustics, Speech Recognition
- by Jose Rangel-Magdaleno
- •
- Signal Processing, Parallel Processing, Instrumentation, VIBRATION ANALYSIS
- by Lori Lamel
- •
- Computer Science, English language, Machine Translation, Speech Acoustics
- by Tony Schmitz
- •
- Engineering, Technology, System Dynamics, Physical sciences
- by Trung Pham
- •
- Engineering, Mathematical Sciences, Numerical Control, Computer numerical control
- by A. Galip Ulsoy and +1
- •
- Process Control, Adaptive Control, Automatic Control, Control Systems
- by Rajah Rasiah
- •
- Semiconductor Manufacturing, Human Capital, Control system, Scale Economies
- by Rachid Touzani
- •
- Engineering, Optimal Control, Process Control, Numerical Method
- by mio lklkk
- •
- Optics, X Rays, EDM, Fabrication

— Average Surface Roughness (R a) is one of the most frequently used texture parameters to define the quality of turned components. The roughness values of a turned surface much depends on cutting parameters such as cutting speed, feed rate and depth of cut. Optimization of these parameters is very important in relation to surface roughness as they reveal the best suitable conditions for the turning operation. In this project, a correlative study of machining parameters and the surface roughness for ferrous (stainless steel 304) and non–ferrous alloy (Aluminium) material is carried out. Response Surface Methodology (RSM) and Analysis of Variance (ANOVA) techniques are employed in this analysis to explain the influence of different cutting parameters on surface roughness values. The combination of optimum experimental parameters can be found by machining these ferrous and non-ferrous materials in CNC turning center and finding the least surface roughness parameters. ANOVA analysis, integrated with Design Expert software, is used to determine effective ratios of the parameters and subsequently the relationships between input parameters and their responses relationship are established. The minimum surface roughness results in reference to spindle rpm, feed rate, and depth of cut are determined and estimation of the optimal surface roughness values (Ra) for least surface roughness are the results obtained in the study. In case of stainless steel 304, optimal values of cutting speed, feed and depth of cut against the least surface roughness value of 1.33 microns are found to be 220 m. min-1 , 0.2 mm. rev-1 and 0.3 mm respectively. In case of Aluminium, optimal values of cutting speed, feed and depth of cut against the least surface roughness value of 2.8 microns are 200 m. min-1 , 0.2 mm. rev-1 and 1.15 mm respectively. These results reaffirm that RSM and ANOVA techniques are useful and efficient in achieving optimal set of machining parameters for select ferrous and non-ferrous materials in correlating the surface finish values.

2.5D engraving machine is a machine used for etching, this machine has three axes which are X, Y and Z, which move two axes (X and Y) simultaneously, and the Z axis moves is not the same. Emerging issues how to implement a programming mechanism which is the most effective to perform the interpolation process the X and Y axes are driven by 5-phase stepper motor. Arduino microcontroller is used as a main controller, and Python TkInter as an interface. Hardware used are stepper motors which is controller by MOSFET IRF540 and IRF9540, and other supporting components. This controller apply the interpolation concept in linear and circular for the process of controlling the movement of two-axis stepper motors (X and Y). Linear interpolation method uses the difference between the X and Y coordinates of the destination with the previously coordinates, while the circular interpolation method using a change in frrequency of the pulses that are similar to the sine and cosine functions. From the results of tests that have been done, 2,5D engraving machine is able to do linear and circular interpolation on four quadrant. On testing the stepper motor speed, if the input frequency is 3000 Hz, then the motor speed is 176 rpm, in contrast to the result of calculation that ought to be worth 180 rpm. The value of the accuracy of the linear interpolation has an average difference of 0,43 mm, while the circular interpolation has an average difference of 2,7 mm compared with the estimated calculation. The average time required to perform the interpolation process is actually much longer 4,44 second for linear interpolation, while the circular interpolation has an average of 3,27 second time difference compared with the calculation results.

This paper evaluates proton exchange membrane (PEM) fuel cell microchannel width and depths ranging from 20 μm to 1000 μm. A DRIE process is employed to create the serpentine microflow field patterns from silicon wafers for channel width and depths ranging from 20 μm to 200 μm. To compare the smaller microchannel dimensions with conventional dimensions, computer numerical control (CNC) machining was used to create the 500 μm and 1000 μm flow field channel dimensions in delrin. All of the plates were coated with gold to prevent corrosion and to improve conductivity.Two air-breathing 2.54 cm × 2.54 cm × 1.47 cm fuel cell stacks were designed and assembled for this research. The same membrane electrode assembly (MEA) with an active area of 1 cm2 was tested with all of the silicon flow field plates with microchannels. The fuel cell performed well with the 20-μm width and depth flow channels (maximum power density of 65 W cm−2 or a maximum of 170 mA cm−2 at 0.2 V), although all of the I–V tests yielded good results for room temperature, air-breathing fuel cells. Microchannels with widths and depths from 100 μm to 20 μm look promising for new high-current density microelectro mechanical (MEMS) fuel cell designs.

- by Rahul Agarwal
- •
- Engineering, Proton Exchange Membrane, Fuel Cell, Current Density
- by E. Cabal-yepez
- •
- Signal Processing, Parallel Processing, Instrumentation, VIBRATION ANALYSIS
- by Taotao Wang
- •
- Information Theory, Channel Coding, OFDM, Network coding
- by Mohammad Al-Jarrah
- •
- Engineering, Mechanical Engineering, Civil Engineering, Computer Aided Design

In this work we present how Augmented Reality (AR) can be used to create an intimate integration of process data with the workspace of an industrial CNC (computer numerical control) machine. AR allows us to combine interactive computer graphics with real objects in a physical environment - in this case, the workspace of an industrial lathe. ASTOR is an autostereoscopic

- by Alex Olwal and +1
- •
- Computer Science, Computer Graphics, Visualization, Augmented Reality
- by Nikolaos Bilalis
- •
- Knowledge Society, European Union, Equal Opportunities, Vocational Training
- by Jayeeta bhattacharjee
- •
- Computer Science, Control Systems, System Design, Industrial electronics
- by Student Helper
- •
- Business, Survey Research, Technical Change, New Technology