The postprocessor for feed-rate optimization of six-axis CNC machine tools

2015 ◽

Cited By ~ 2

Author(s):

Sepehr Zarifmansour ◽

Rudolf Seethaler

Keyword(s):

Feed Rate ◽

Machine Tools ◽

Trajectory Optimization ◽

High Speed ◽

Optimization Method ◽

Cnc Machine Tools ◽

Cnc Machine ◽

Machining Processes ◽

Rate Optimization ◽

Feed Rate Optimization

Growing industrial demand for faster machine tools, makes feed-rate and trajectory optimization a challenging problem in machining processes. One of the most challenging machining operations for computer numerically controlled (CNC) machine tools is corner tracking. In this scenario, most of the conventional feed-rate optimization approaches sacrifice speed for accuracy. This paper, proposes a new feed-rate and trajectory optimization algorithm for CNC machines. At each corner of the trajectory, the presented algorithm regenerates the trajectory, using a circular move within a desired tolerance limit. Then, a new feed rate optimization method is employed, which enables the machine tool to travel at the maximum feasible velocity through the corners, while taking acceleration constraints into account. Experimental results for different desired tolerances indicate that the new algorithm achieves significantly shorter travel times than the theoretical minimum time trajectory with zero tolerance.

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Experimental Assessment of Effect of Backlash Control Parameters on Quadrant Protrusions of Circular Tests for CNC Machine Tools

Journal of Advanced Manufacturing Systems ◽

10.1142/s0219686720500043 ◽

2020 ◽

Vol 19 (01) ◽

pp. 65-85

Author(s):

Chuan-Hsun Hsu ◽

Chi-Hsiang Wang ◽

Syh-Shiuh Yeh

Keyword(s):

Machine Tool ◽

Feed Rate ◽

Machine Tools ◽

Search Algorithm ◽

Cnc Machine Tools ◽

Control Parameters ◽

Cnc Machine ◽

Circular Test ◽

Binary Search Algorithm ◽

The Relationship

Backlash, friction, and servo lag factors often result in protrusion or segment difference phenomenon in the moving speed reversal of a machine tool’s moving table. This phenomenon can be improved by adjusting the backlash control parameters of the machine tool controller, but the control parameters must vary with the feed rate and payload of the moving table. Therefore, this study performed the circular test process for CNC machine tools, and used different feed rate, radius, and payload motion conditions to discuss the effect of backlash control parameters on quadrant protrusions. First, this study used parameter-range reduction combined with the Taguchi method and the binary search algorithm to search for the optimal backlash control parameters in the parameter setting range, so that the machine tool could have preferable quadrant protrusion performance when executing circular tests. Afterward, the correlation of the moving table feed rate, radius, and payload to the quadrant protrusion was analyzed according to the experimental results. The results indicated that the machine tool moving table feed rate had the most apparent effect on quadrant protrusions, and the relationship between the payload and quadrant protrusion was influenced by the moving table feed rate and circular radius simultaneously.

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Non-Contact Measuring Modeling and Simulation of CNC Machine Tools under High Feed Rate Condition

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.10-12.621 ◽

2007 ◽

Vol 10-12 ◽

pp. 621-625

Author(s):

X.S. Wang ◽

Jian Guo Yang

Keyword(s):

Feed Rate ◽

Machine Tools ◽

Laser Interferometer ◽

Measurement Model ◽

Cnc Machine Tools ◽

Cnc Machine ◽

Rate Condition ◽

High Feed Rate ◽

High Feed ◽

Measurement Principle

This article sets forth a new precision measurement method of CNC machine tools. The method incorporates the laser interferometer and the measurement principle of the double ball bar (DBB), and can measure the machine tool precision under the high feed rate condition. The generalized measurement model of three-axis has been built. Data analysis software is developed to simulate the run condition of machine tools. The repeatable experiment results proves that the method is feasible and its precision is higher than DBB`s.

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