A tool path generation and contour error estimation method for four-axis serial machines

Mechatronics ◽  
2015 ◽  
Vol 31 ◽  
pp. 78-88 ◽  
Author(s):  
Jixiang Yang ◽  
Youping Chen ◽  
Yuanhao Chen ◽  
Dailin Zhang
Keyword(s):  
Error Estimation ◽  
Tool Path ◽  
Estimation Method ◽  
Tool Path Generation ◽  
Contour Error ◽  
Path Generation ◽  
Error Estimation Method

scholarly journals Cross-coupled control based on real-time Double Circle contour error estimation for biaxial motion system

2021 ◽  
Vol 54 (3-4) ◽  
pp. 324-335
Author(s):  
Li Bo ◽  
Wang Taiyong ◽  
Wang Peng
Keyword(s):  
Real Time ◽  
Error Estimation ◽  
Approximation Method ◽  
Control Strategy ◽  
Estimation Method ◽  
Contour Error ◽  
Motion System ◽  
Contour Machining ◽  
And Control ◽  
Error Estimation Method

In contour machining, contour error is a major factor affecting machining quality. In order to improve the performance of contour following, many control techniques based on real-time contour error estimation have been developed. In this paper, a Double Circle contour error estimation method is proposed. First, based on the kinematic information of the reference point on the command trajectory, five interpolation points closest to the actual point are obtained. Then the approximate contour error is obtained by employing the Double Circle approximation method. Compared with the common contour error approximation methods, the proposed method can achieve high precision approximation. In addition, according to the proposed contour error approximation method, the cross-coupled control strategy is improved. Experiments prove the effectiveness of the proposed estimation method and control strategy.

Real-time CNC Tool Path Generation for Machining IGES Surfaces

1993 ◽  
Vol 115 (4) ◽  
pp. 480-486 ◽  
Author(s):  
Y. D. Chen ◽  
J. Ni ◽  
S. M. Wu
Keyword(s):  
Real Time ◽  
Tool Path ◽  
Tool Path Generation ◽  
Contour Error ◽  
Path Generation ◽  
Motion Controller ◽  
Cnc System ◽  
Generation Algorithm ◽  
Tool Paths ◽  
Data Files

A real-time CNC tool path generation algorithm has been developed for machining IGES surfaces. IGES-based CAD data files can be directly inputted to the CNC system and the tool paths generated in real time can be passed to a motion controller during cutting via a Multibuss II backplane structure. The development of such a real-time tool path generation method has eliminated the need for a tradeoff between the desired surface accuracy and the required memory size for storing off-line generated NC codes. The real-time NC path generation algorithm can properly deal with issues such as trimming lines, gouging detection, and adaptive tool step adjustment. The developed algorithm has been implemented on a multi-processor CNC system and verified through actual cutting tests. The test results show that no violating conditions occurred on machined part surfaces, and the surface contour error of the cut part is less than the given tolerance, which was 0.02 mm in this particular test.

Tool Path Optimization of 2D Contour Considering Stock Boundary

2012 ◽  
Vol 251 ◽  
pp. 169-172
Author(s):  
Fu Zhong Wu
Keyword(s):  
Present Method ◽  
Tool Path ◽  
Three Dimensional ◽  
Boundary Curve ◽  
Tool Path Generation ◽  
Path Optimization ◽  
Path Generation ◽  
Offset Curves ◽  
Measuring Machine ◽  
Tool Diameter

Based on analyzing the existing algorithms, a novel tool path generation of 2D contour considering stock boundary is presented. Firstly the boundary points of stock are obtained by three-dimensional measuring machine. And the boundary curve is constructed by method of features identifying. The stock boundary is offset toward outside with tool diameter. An enclosed region is formed between the contour curves and the offset curves of stock boundary. The tool path is generated by form of parallel spiral by offsetting the stock boundary in the enclosed region. Finally the validity of present method is demonstrated by an example.

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