In the machining progress of free-form surface, tool path is presented as continuous small line segments. To achieve high speed and fine quality, needs to be smoothed. This study presents a smooth generation algorithm based on B-spline curves for segments machining. The includes two modules: module real-time look-ahead interpolation module. module, divided into non-fitting regions fitting by three conditions: length segments, angle adjacent change rate angle. control contour error get are...

The introduction of Fieldbus technology makes the performance CNC system greatly improved. However with development mechanical engineering technology, equipment manufacturing, aerospace and defense industry other industries for high speed precision machining requirements is Limited by transmission bandwidth, traditional has been difficult to meet those demands. In order solve this problem improve accuracy open system, EtherCAT network used in research. paper, architecture given first, its...

A synchronization method for local applications of EtherCAT master-slave is proposed in this paper. Firstly, initial shift time defined according to the communication structure open CNC system. Then, and clock rate ratio between master reference calculated initialization SYNC0 signal. After that, master’s cycle remaining adjusting time. Finally, measuring calculated. The difference them used as basis compensating adjusted by realized cycle. Experimental results showed that good effect can be achieved

Feedrate adaptive interpolation algorithm for NURBS curve effectively reduces the chord error. In order to improve machining quality and reduce impact tools caused by change of feedrate, it needs control fluctuation acceleration jerk. efficient accurate calculate points during process interpolation, through analysis computation structure B-spline, an its calculation complexity is given based on sharing values basis functions. Simulation results show that controls jerk, improves efficiency...

The toolpath in Computer Numerical Control (CNC) machining program is commonly composed of small line segments and fed to CNC centers control the process. connection points only have G <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sup> continuity, resulting discontinuity velocity, acceleration jerk process which leads varying cutting load leaves marks on surface workpiece. This paper presents a tool path smoothing method by enforcing...

With the rapid development of internet things and intelligent manufacturing technology, computer numerical controllers are required to reflect running status equipments, but existing discrete equipments their control systems cannot extract, transport process information, while workshop management don't have ability simulate production line system based on information. To solve this problem, paper proposed a method design multi-channel controller, designed simulation has two modules,...

The international machine tool producer is toward green production. high-efficiency, low pollution, energy consumption, recovery and reuse of resources are developed tools expected to be included in the consumption restrain. By this trend, a study prediction cutting proposed. Spindle rotation velocity, feed rate, depth machining modeled as input parameters corresponding output parameter. relationship between established based on BP neural network. From results, average error network measured...

In this paper the problem of look-up table parameters updating is studied to cope with physical systems changes due operating conditions and age. To aim, an estimation algorithm developed in order update a finite-time. The convergence proofs are presented by Lyapunov-based approach, results given based on regressor model related identifiability condition. error analyzed for proposed algorithm. validity verified through discharge coefficient map gasoline engine form enDYNA.

In this paper, a real-time feedrate dynamic planning method in CNC system is studied. Machine affected by interference conditions from external environment. Commonly used machining modes such as Exact Stop Mode and Continuous are both influenced emergency stop, reset override signals. The corresponding studied paper. Segment linking applied Mode, guarantees constant velocity while traversing multi-blocks, ensure acceleration within limits. inference signals only affect the current segment....

Lines and circular arcs are commonly used in CNC systems, the numerical controller always treats them separately, two different routines. In this paper, a circle discrete method is proposed, both linear segments treated as straight lines motion layer under permitted tolerance. One major barrier of trajectory planning on G01 transition velocity at corner. requirement high speed accuracy, symmetrical corner studied, with characteristics simplicity computing efficiency, promotes Furthermore,...

The elderly travel safety has attracted more and attention, this paper studies a real -time positioning measurement using intelligent shoes system that can locate the position information of in time.The project is integrated bottom heel part elderly.The interaction with server transmits location through GPS S IM models shoes.So mobile clients achieve tracking monitoring for between client.This includes function design, structure in-depth study technical route key problems.In functional it...

The command points of tool path generated by the computer-aided manufacturing systems locate near desired curves within a certain tolerance, so smooth generation method based on directive fitting is not accurate. To overcome this shortage and generate path, correction compression algorithm proposed in paper. Firstly, used to compute parameters circle three dimension space given. Then, was corrected, position new are Secondly, locating regions fitted NURBS curves. experimental results show...