Speed optimization control method of smooth motion for high-speed CNC machine tools

2009 ◽  
Vol 49 (1-4) ◽  
pp. 313-325 ◽  
Author(s):  
Lin Wang ◽  
Jianfu F. Cao ◽  
Yuqiang Q. Li
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Control Method ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Smooth Motion ◽  
Speed Optimization ◽  
Optimization Control

Study on Force Control in Abrasive Polishing of Aspheric Parts

2010 ◽  
Vol 37-38 ◽  
pp. 1287-1291 ◽  
Author(s):  
Di Zheng ◽  
Bi Da Lv ◽  
Jian Ming Zhan ◽  
Li Yong Hu
Keyword(s):  
Machine Tools ◽  
Control Method ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Polishing Force ◽  
Application Fields ◽  
Polishing Tool ◽  
The Mathematical Model ◽  
Precision Machines ◽  
Stable Control

Aspheric parts are attracting many researchers’ attention for their excellent optical properties. The commonly used manufacturing technology for aspheric parts are mainly based on dedicated high precision machines, resulting in high cost and restricted application fields. To polish this kind of parts on general CNC machine tools, however, the surface quality improvement is limited due to the problem of force-position coupling. In order to solve this issue, a force-position decoupling control method for abrasive polishing was studied, a corresponding comliant polishing tool system was developed, and the mathematical model of the tool system was established. In addition, a polishing force controller was designed, and the performance of the tool system was numerically simulated. Simulation results showed that the polishing tool system can effectively achieve the tasks of force-position decoupling and the stable control of the polishing force.

scholarly journals An approach of developing low cost ARM based CNC systems by controlling CAN drives

2018 ◽  
Vol 224 ◽  
pp. 01020 ◽  
Author(s):  
Georgi M. Martinov ◽  
Akram Al Khoury ◽  
Ahed Issa
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Low Cost ◽  
Cnc Machine Tools ◽  
Application Layer ◽  
Cnc Machine ◽  
Servo Drive ◽  
Wide Range ◽  
Quality Of Products

Nowadays, there is a big demand on using small sized CNC machine tools, which have low price tag, wide range of implementations, low manufacturing costs and can be used for educational purposes. These machines can achieve casual manufacturing routines, like milling and drilling in applications, where there is no need for high speed performances and super quality of products. In this work, we proposed a model of CNC for these machines and analysed its components and efficiency. The model consists of three main layers: CNC system (application layer), ARM based microcomputer as CAN master and controller (connecting layer) and Servo-Drive Step Motors (actuating layer).

Non-Contact Device for Measuring Frequency Response Functions of CNC Machine Tools

Manufacturing ◽  
2003 ◽  
Author(s):  
Donald Esterling ◽  
F. Donald Caulfield ◽  
Aaron Kiefer ◽  
Gregory Buckner ◽  
Pavan Jaju
Keyword(s):  
Frequency Response ◽  
Machine Tools ◽  
High Speed ◽  
Operating Conditions ◽  
Modal Testing ◽  
Cnc Machine Tools ◽  
Cnc Milling ◽  
Cnc Machine ◽  
Machining Processes ◽  
Test Procedures

The frequency response function (FRF) of a CNC machine tool is composed of tool/toolholder/spindle dynamics, and plays an important role in determining the stability of high speed machining processes. This paper details the design, development and operational verification of a non-contacting, controllable, electromechanical actuator (EMA) for measuring the FRFs of tools mounted in CNC milling machines. Although standard modal testing methods are available and provide similarly accurate results, these test procedures are difficult to perform in machine shop environments and can require expensive equipment. The EMA developed as part of this research extends the capabilities of the NIST “best speeds device” to provide controllable, non-contacting excitation for modal tests on machine tools. This EMA device offers the advantages of being accurate, easy to use, and applicable to a wide variety of tools and operating conditions.

Study on an Acc/Dec Method Based on Moving Average Technology for CNC Machine Tools

2014 ◽  
Vol 556-562 ◽  
pp. 1413-1416 ◽  
Author(s):  
Tian Xiang Hu ◽  
Li Bing Zhang ◽  
Ting Wu ◽  
Feng Li Huang
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Processing Time ◽  
Moving Average ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Cnc System ◽  
Planning Approach ◽  
Velocity Planning ◽  
S Curve

To overcome some shortcomings of the linear Acc/Dec approach and the traditional S-curve Acc/Dec method, a novel velocity planning approach is proposed for CNC machine tools in this paper. The velocity planning model based on moving average technology is structured. The presented approach is used to make velocity planning for the CNC system. Comparing with the linear Acc/Dec algorithm, the presented method greatly improves motional smoothness of the linear Acc/Dec approach and reduces the complexity of the traditional S-curve Acc/Dec algorithm, which is more suitable for high-speed and high-precision CNC machine tools. The proposed approach is tested by simulation and experimentation. Simulation and experimental results have shown that the proposed method can significantly improve the motional smoothness and consumes less resource and shortens processing time for the CNC system.

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