Design and Testing of the Precise Cutting Test Bed for Micron Paring Machining

2012 ◽  
Vol 538-541 ◽  
pp. 1290-1293
Author(s):  
Han Guo ◽  
Yan Ma
Keyword(s):  
Raw Materials ◽  
Numerical Control ◽  
Stepper Motor ◽  
Test Bed ◽  
Processing Instruction ◽  
Feeding Mechanism ◽  
Cutting Test ◽  
Design Requirements ◽  
Clamping Device ◽  
Design And Testing

The test bed for micron paring machining is a kind of Computer numerical control (CNC) carpentry test beds. Movement of machine is controlled automatically according to processing instructions, machining of different raw materials can be realized by simply changing the processing instruction program. The test bed’s precision and its persistence are mainly guaranteed by the lathe bed, and have an air clamping device and its feeding mechanism includes a stepper motor for CNC feeding. At the end of the thesis, the conclusion of experiment presents widths of micron parings machined by cutting lengthways along the grain fall between 50~150 µm. With further analysis, around 72% of the parings are 60~100 µm thick, around 75% are 5~8 mm wide, around 78% are 65~75 mm long. The results show micron parings machined by the specialised test bed meet the design requirements for micron parings.

The Application of Computer Techniques in the Design and Manufacturing of Timing Scrolls

1993 ◽  
Vol 207 (2) ◽  
pp. 99-108
Author(s):  
L Q Tang ◽  
D N Moreton
Keyword(s):  
Dynamic Characteristic ◽  
Computer Aided Design ◽  
Numerical Control ◽  
Feeding Mechanism ◽  
Control Techniques ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Manufacturing Techniques ◽  
Aided Design ◽  
Design And Manufacture

The timing scroll is an important feeding mechanism on packaging lines. As packaging line speeds have increased and the shape of containers has become more diverse, the techniques used for the design and manufacture of such timing scrolls have become critical for successful packaging line performance. Since 1980, various techniques have evolved to improve scroll design, manufacture and the associated line performance. In recent years, as CAD (computer aided design), CAM (computer aided manufacture) and CNC (computer numerical control) techniques have evolved, scroll design and manufacturing techniques began to be linked with computer techniques. In this paper, a scroll design and manufacturing package is presented which can be run on a minicomputer, such as a μ-VAX on an IBM PC clone. This scroll package can produce a timing scroll for any type of container with a correct pocket shape and good dynamic characteristic. Tests using carefully chosen containers have been made using this package and the results indicate that the scrolls obtained by this package have the correct pocket shape and good line performance. However, the design of a good pick-up geometry for some container shapes remains a problem.

The Design of the NC Teaching Plotter Based on Single Chip Microcomputer

2014 ◽  
Vol 909 ◽  
pp. 342-345
Author(s):  
Xin Juan Shang
Keyword(s):  
Motor Control ◽  
Teaching Practice ◽  
Nc Machining ◽  
Numerical Control ◽  
Stepper Motor ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Nc Program ◽  
Practice Teaching ◽  
Stepper Motor Control

The NC Teaching Plotter is designed for the practice teaching needs of NC machining, In order to improve current existing practice teaching environment of "many student, less equipment". It explains the NC concept with concise way and demonstrates NC thought by the intuitive operation.In this paper, the design of NC teaching plotter makes interpolation motion between pen and table based on NC program in accordance with the requirement made by user, to draw the graphics by moving the magnet control brush painting through the single chip digital control and the two stepper motor control X, Y two axes feed. The NC teaching plotter which demonstrates more clearly and directly the numerical control idea has high practical value for teaching practice.

A novel automatic cooking robot for Chinese dishes

Robotica ◽  
2007 ◽  
Vol 25 (4) ◽  
pp. 445-450 ◽  
Author(s):  
W. X. Yan ◽  
Z. Fu ◽  
Y. H. Liu ◽  
Y. Z. Zhao ◽  
X. Y. Zhou ◽  
...  
Keyword(s):  
Control System ◽  
Numerical Control ◽  
Control Technology ◽  
Fire Control ◽  
Feeding Mechanism

SUMMARYUp to now, most people are still cooking in the kitchen, which makes them feel fatigued and also makes the air polluted. With the development of the numerical control technology, it becomes more and more urgent to apply the related technology to the automatic cooking field. In this paper, the cooking technique for the Chinese dishes is introduced and China's first cooking robot, named AI Cooking Robot (AIC), is presented. The robot mainly consists of four parts: the wok mechanism, the stirring-fry and dispersing mechanism, the feeding mechanism, and the mechanism of leaving the material in the middle process. In order to adjust the temperature, the fire control system is also given in this paper. Experiments show that the new robot will be a milestone in the cooking automation science because of its cooking technique.

Control System of Moving Target Simulator

2012 ◽  
Vol 442 ◽  
pp. 488-492 ◽  
Author(s):  
Rong Chun Sun ◽  
Xue Song
Keyword(s):  
Control System ◽  
Image Motion ◽  
Stepper Motor ◽  
Moving Target ◽  
The Core ◽  
Control Precision ◽  
Ground Target ◽  
Design Requirements ◽  
High Control ◽  
Rotation Motion

To test the accuracy of image motion compensation of space camera, the moving target simulator was developed according to the principle of relative motion. As the core controller, PIC microcontroller controls DC motor to drive photoetching turntable rotating to simulate the relative linear velocity between ground target and aircraft, and the rotation motion is divided into uniform velocity rotation and sinusoidal velocity rotation. Furthermore, the simulation of drift angle of aircraft was realized by controlling stepper motor to drive the photoetching turntable deflecting, and the deflection includes uniform deflection, sinusoidal velocity deflection and specified angle positioning. The design of the hardware and software of control system has been completed and tested, and the experiment results show that the control system has high control precision and meets the design requirements.

Skylab's Astronaut Maneuvering Unit (Experiment M509) — A Comparison of Six Degree of Freedom Simulation and on-Orbit Flight

1974 ◽  
Vol 18 (2) ◽  
pp. 187-187
Author(s):  
A. M. Ray
Keyword(s):  
Space Shuttle ◽  
Space Station ◽  
Degree Of Freedom ◽  
Test Bed ◽  
Control Logic ◽  
Test And Evaluation ◽  
Unit Design ◽  
Design Requirements ◽  
Experiment Hardware ◽  
Six Degree Of Freedom

A test bed type astronaut maneuvering unit was designed and evaluated with the assistance of Martin Marietta's six degree of freedom simulator. Four different control modes were developed for this unit for test and evaluation inside Skylab's 22 foot diameter orbital workshop. The orbital tests have provided the experience and technology base necessary for space Shuttle and space station astronaut maneuvering unit design requirements. This paper is an overview of the M509 experiment hardware, procedures, and results with emphasis on the comparison between on-orbit test results and the six degree of freedom simulator. The simulator was used to develop the unit's design requirements, evaluate the control logic parameters, and for developing maneuvers and training the crew. The simulator will also be flown by the Skylab crews in May for post flight evaluation and simulator calibration. (Films of the simulations and on-orbit flight are available as part of this presentation.)

Dynamic Left Atrioventricular Phantom Test Bed Emulating Mitral Valve Motion

2020 ◽  
Vol 14 (3) ◽  
Author(s):  
Toufic Azar ◽  
Stewart McLennan ◽  
Michael Walsh ◽  
Jorge Angeles ◽  
Jozsef Kövecses ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Blood Flow ◽  
Polyvinyl Alcohol ◽  
Computer Aided Design ◽  
Human Heart ◽  
Numerical Control ◽  
Test Bed ◽  
Numerical Control Machining ◽  
Valve Motion ◽  
Test Beds

Abstract Novel catheter-based medical procedures targeting heart valve structures are currently under development. These techniques entail installing a prosthetic implant on valves inside a beating heart. The development of these approaches requires a simple and effective validation test bed. Current early process testing methods rely on both static and dynamically pressurized excised porcine hearts. The variability between excised-tissue mechanical properties poses problems of reproducibility. In addition, these test beds do not emulate annulus motion, which affects the implant installation. A reproducible phantom of the left atrioventricular chambers was developed. The system consists of a hydraulic constant flow arrangement and a polyvinyl alcohol phantom heart with material properties that mimic passive myocardium mechanical properties and annulus motion. The system was then used to emulate blood flow through an actual heart. The building process starts by obtaining an accurate computer-aided design (CAD) model of a human heart, from which, a mold is produced using a novel rapid-freezing prototyping method and computer numerical control machining. The phantom is then cast-out of polyvinyl alcohol (PVA), a hydrogel, whose mechanical properties are set by subjecting the phantom to freeze and thaw cycles. Subsequently, blood flow is emulated at a constant volumetric rate at the atrial pressure observed in a healthy adult human heart at rest. The annulus motion is implemented by suturing the outside of the phantom to a one-degree-of-freedom cam-follower mechanism reproducing valve motion. Such test beds could play a significant role in future development of medical devices.

scholarly journals Highly Compressible Origami Bellows for Harsh Environments

2016 ◽  
Author(s):  
Jared Butler ◽  
Jessica Morgan ◽  
Nathan Pehrson ◽  
Kyler Tolman ◽  
Terri Bateman ◽  
...  
Keyword(s):  
Thermal Cycling ◽  
Harsh Environments ◽  
Outer Diameter ◽  
Space Application ◽  
High Radiation ◽  
Stroke Length ◽  
Metal Bellows ◽  
Low Mass ◽  
Design Requirements ◽  
Design And Testing

The design and testing of a highly compressible origami bellows for harsh environments is described. Several origami patterns are evaluated and the Kresling fold pattern was customized to constraints and selected for use in the bellows design. Origami bellows were prototyped in five different materials and tested in fatigue, thermal cycling, ablation, and radiation. Tested bellows show good fatigue life exceeding 100,000 cycles for some materials and resilience to potential harsh environmental conditions such as thermal cycling, abrasion, and high radiation. The bellows can be designed to fit within a given inner and outer diameter and stroke length depending on the design requirements. The origami bellows shows promise for space application and as an adequate replacement for current metal bellows due to its high compressibility and low mass.

Analysis, Design, and Testing of a Position Servo Utilizing a Stepper Motor

1963 ◽  
Vol 85 (2) ◽  
pp. 211-216
Author(s):  
J. C. Nicklas
Keyword(s):  
Control System ◽  
Position Control ◽  
Dynamic Performance ◽  
Stepper Motor ◽  
Order System ◽  
Actual Performance ◽  
Error Detector ◽  
Analysis Design ◽  
Design And Testing ◽  
Position Control System

The development of a position control system using a stepper or incremental motor is described. The advantages of this type of prime mover are discussed, and a technique of integrating the stepper motor into the system is analyzed. The output signal from the error detector used in the system comes from a sampler and zero-order hold circuit. This signal controls a gate which either allows or inhibits a pulse train to drive the stepper motor. The load on the motor is an underdamped second-order system. The stepper motor output position and the reference input determine the error. The analysis includes a stability investigation using the describing-function method and a computer simulation to determine the dynamic performance of the system. The effects of noise in the system are also investigated on the computer. The equipment used to mechanize the control system is described, and results of experimentol work to determine the actual performance of the system are given.

Embedded Machine Tool CNC System Based on the ARM and MCX314

2011 ◽  
Vol 308-310 ◽  
pp. 1401-1404
Author(s):  
Xian Chen Song ◽  
Qing Hua Zhou
Keyword(s):  
Operating System ◽  
Machine Tool ◽  
Manufacturing Systems ◽  
Manufacturing Industry ◽  
System Development ◽  
Numerical Control ◽  
Software Platform ◽  
Cnc System ◽  
Hardware Platform ◽  
Design And Testing

CNC(Computer Numerical Control) machine tool is the foundation and core of modern manufacturing systems, advanced CNC technology is the key to sustainable development of machine tool manufacturing industry. This thesis presents ARM as the main chip, motion control chip MCX314, the operating system using μC / OS-II, to build a CNC system development hardware platform and software platform, to explore the new ways for numerical control system development and design. This thesis can be divided into: CNC system hardware platform structures, including ARM and external hardware selection, hardware interface design and testing; MCX314 hardware platform design and testing; Software Platform, including the use of real-time operating system μC / OS-II to achieve the mission of the NC system, scheduling, management, μC / OS-II transplantation on ARM; MCX314 hardware platform building and testing; application framework built , program design and testing. Test results showed that: ARM as the main chip, MCX314 as a motion controller of the CNC system is feasible, its motion performance can meet the design requirements.

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