Research on Positioning Error Analysis and Compensation Experiment of the Dual-Driving Feed Worktable

2020 ◽  
Author(s):  
Jiafu Xue ◽  
Hong Lu ◽  
Qi Liu ◽  
Qiong Liu ◽  
Haoyu Dou ◽  
...  
Keyword(s):  
Error Analysis ◽  
Error Compensation ◽  
Machine Tools ◽  
High Stability ◽  
Load Capacity ◽  
Machining Accuracy ◽  
Positioning Error ◽  
Feed System ◽  
Compensation Strategy ◽  
Optical Scale

Abstract The dual-driving feed worktable (DDFW) is widely used in feed system because of its high stability and load capacity, while its feed system is one of the important parts that affects the feed accuracy of machine tools. Due to the influence of assembly, manufacturing and other factors, the positioning error of DDFW is produced, which reduces the machining accuracy of the machine tools. Therefore, the research on the positioning error compensation of DDFW is of great significance. In this paper, the positioning error of DDFW is measured with absolute optical scale and the positioning error model of DDFW is established by modeling method of orthogonal polynomials at first. Then an electronic cam combined with virtual axis compensation strategy is designed for DDFW to reduce positioning error. Finally, the compensation experiment is carried out and the error compensation results are analyzed to verify the effectiveness of the error compensation strategy designed in this paper.

Thermal Error Analysis and Compensation Technology for High Precision Aspheric Measuring Platform

2013 ◽  
Vol 712-715 ◽  
pp. 1571-1575
Author(s):  
Feng Yang ◽  
Qia Heng Tang ◽  
Yin Biao Guo
Keyword(s):  
Error Analysis ◽  
High Precision ◽  
Heat Balance ◽  
Error Compensation ◽  
Thermal Deformation ◽  
Thermal Error ◽  
Positioning Error ◽  
Compensation Model ◽  
Balance State ◽  
Thermal Error Compensation

In this paper, a thermal error analysis and compensation method for a high precision aspheric measuring platform driven by a linear motor system is presented. After analyzing the heat source of thermal deformation, the thermal deformation of guide is selected to be object, and the thermal analysis method of guide in heat balance state is proposed. According to the motor temperature at different positions, the thermal error curve of guide is obtained through simulation. Modeling the global positioning error of measuring platform and the compensation model of thermal error using polynomial fitting, the thermal error compensation experiments is implemented by applying compensation system of measuring platform's controller. The experimental results show that the maximum positioning error in heat balance state is reduced from 1.5μm to 0.7μm, which verify the validity of thermal error compensation model.

Thermal Error Compensation on Boring & Milling Machining Center Feed System Based on PMAC

2014 ◽  
Vol 945-949 ◽  
pp. 1669-1672
Author(s):  
Jun Sun ◽  
Xing Liu ◽  
Zhi Xuan Li
Keyword(s):  
Real Time ◽  
Error Compensation ◽  
Tool Path ◽  
Thermal Error ◽  
Machining Accuracy ◽  
Feed System ◽  
Nc Machine Tool ◽  
Machining Center ◽  
Nc Machine ◽  
Processing Accuracy

Aiming to deal with thermal error of NC machine tool which can cause reduce of machining accuracy, this paper uses an external error compensation which interacts with NC controllers and PMAC multi-axis and then revises the tool path by adding the error tested in real-time by PMAC card. The processing accuracy is improved eventually. This method can compensate machine geometric errors and thermal errors in real-time. Comparing with other methods of error preventing, this method is more effective and affordable.

Research on Error Compensation Techniques for NC Machine Tools

2013 ◽  
Vol 321-324 ◽  
pp. 833-837
Author(s):  
Gao Feng Zhu ◽  
Yan Lei Zhang
Keyword(s):  
Error Compensation ◽  
Machine Tools ◽  
Error Modeling ◽  
Machining Accuracy ◽  
Characteristic Matrix ◽  
Detection Model ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Multi Body ◽  
Error Parameter

Cause of machining error for NC Machine Tools is described, and principle of NC machinings error compensation on the basis of the existing in-line detection model of NC machine tools is analyzed in this paper. Regularity of error Modeling based on multi-body system is found,accordingly, we will find the corresponding characteristic matrix and transformation matrix if location features and sport features of the adjacent body are confirmed. Then, formula of error model is found, and we can get numerical solution and compensate error according to the identified error parameter. As a result, the machining accuracy of machine tools can be greatly improved.

Research on Volumetric Error Measurement, Modeling and Compensation for NC Machine Tools

2014 ◽  
Vol 513-517 ◽  
pp. 4202-4205
Author(s):  
Hong Xin Zhang ◽  
Qian Jian Guo
Keyword(s):  
Machine Tool ◽  
Error Compensation ◽  
Machine Tools ◽  
Thermal Error ◽  
Error Modeling ◽  
Cnc Machine Tools ◽  
Machining Accuracy ◽  
Volumetric Error ◽  
The Impact ◽  
Thermal Error Compensation

With the increasing requirements of the machining accuracy of CNC machine tools, the impact of thermal deformation is growing. Thermal error compensation technology can predict and compensate the thermal errors in real-time, and improve the machining accuracy of the machine tool. In this paper, the research objects of thermal error compensation is expanded to the volumetric error of the machine tool, the volumetric error modeling of a three-axis machine tool is fulfilled and a compensator is developed for the compensation experiment, which provides scientific basis for the improvement of the machining accuracy.

Real-time Thermal Error Compensation Strategy for Precision Machine tools

2020 ◽  
Vol 22 ◽  
pp. 2386-2396
Author(s):  
T. Narendra Reddy ◽  
V. Shanmugaraj ◽  
Prakash Vinod ◽  
S. Gopi Krishna
Keyword(s):  
Real Time ◽  
Error Compensation ◽  
Machine Tools ◽  
Thermal Error ◽  
Compensation Strategy ◽  
Precision Machine ◽  
Precision Machine Tools ◽  
Thermal Error Compensation

Real-Time Error Compensation Technique and Its Application on NC Machine Tools

2004 ◽  
Vol 471-472 ◽  
pp. 587-591
Author(s):  
Guo Liang Liu ◽  
H.T. Zhao ◽  
G. Turyagye ◽  
Y.Q. Ren ◽  
Jian Guo Yang ◽  
...  
Keyword(s):  
Real Time ◽  
Error Compensation ◽  
Machine Tools ◽  
Thermal Error ◽  
The Body ◽  
Machining Accuracy ◽  
Time Error ◽  
Error Components ◽  
Nc Machine ◽  
Nc Machine Tools

This paper presents the method and process of the real-time error compensation (RTEC) on NC machine tools, which includes: identification and measurement of error components, separating and modeling of geometric-thermal error components, geometric-thermal volumetric error synthesis model, compensation control system, performance evaluation of error compensation by the body diagonal displacement measurement, and the industry application of real-time error compensation. The technique has been successfully applied to many different NC machine tools in the plants for practical production, and the machining accuracy of the NC machine tools is improved by an order of magnitude with low cost.

A Low Cost and Efficient Volumetric-Error Measurement Method for Five-Axis Machine Tools

2013 ◽  
Vol 284-287 ◽  
pp. 1723-1728
Author(s):  
Shih Ming Wang ◽  
Han Jen Yu ◽  
Hung Wei Liao
Keyword(s):  
Machine Tool ◽  
Error Compensation ◽  
Machine Tools ◽  
Measurement Method ◽  
Low Cost ◽  
Machining Accuracy ◽  
Error Measurement ◽  
Volumetric Error ◽  
Volumetric Errors ◽  
Five Axis

Error compensation is an effective and inexpensive way that can further enhance the machining accuracy of a multi-axis machine tool. The volumetric error measurement method is an essential of the error compensation method. The measurement of volumetric errors of a 5-axis machine tool is very difficult to be conducted due to its complexity. In this study, a volumetric-error measurement method using telescoping ball-bar was developed for the three major types of 5-axis machines. With the use of the three derived error models and the two-step measurement procedures, the method can quickly determine the volumetric errors of the three types of 5-axis machine tools. Comparing to the measurement methods currently used in industry, the proposed method provides the advantages of low cost, easy setup, and high efficiency.

Improvement Technology and Research Contents of Machining Accuracy for CNC Machine Tools

2013 ◽  
Vol 394 ◽  
pp. 195-200
Author(s):  
Xiao Peng Li ◽  
Hao Tian Yang ◽  
Ya Min Liang ◽  
Guang Hui Zhao ◽  
Xing Ju
Keyword(s):  
Error Compensation ◽  
Machine Tools ◽  
Rapid Development ◽  
Cnc Machine Tools ◽  
Precision Machining ◽  
Machining Accuracy ◽  
Cnc Machine ◽  
Error Prevention ◽  
New Era ◽  
Ultra Precision

To bring a new technological revolution, CNC technology and machines give the birth of a new era of control and production. The rapid development of CNC has considerably advanced the precision and ultra-precision machining technology to improve a new level and great attention. From error prevention and compensation, researches of the CNC machines precision at home and abroad were introduced. Key reasons for error compensation hardly use in the domestic widely were pointed out. Finally, the necessity and main contents of error compensation technology were presented according to the actual situation of enterprises.

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