Please use this identifier to cite or link to this item:
Title: Improving contouring accuracy by tuning gains for a bi-axial CNC machine
Authors: Xi, X.-C.
Poo, A.-N. 
Hong, G.-S. 
Keywords: CNC (computer numerical control)
Contour error
Contouring accuracy
Matched dynamics
Motion control
Tracking error
Issue Date: Apr-2009
Citation: Xi, X.-C., Poo, A.-N., Hong, G.-S. (2009-04). Improving contouring accuracy by tuning gains for a bi-axial CNC machine. International Journal of Machine Tools and Manufacture 49 (5) : 395-406. ScholarBank@NUS Repository.
Abstract: Contour errors in continuous-path computer numerical control (CNC) systems usually result from unmatched axial dynamics and undesirable nonlinearities. The errors due to unmatched dynamics can be largely reduced by using a simple controller so as to keep the order of axial dynamics low and by tuning appropriately the proportional gains to match the dynamics. Experimental results show that the resulting matched axial dynamics can, on one hand, effectively eliminate the linear contour errors, and, on the other hand, largely reduce the circular contour errors due to unmatched axial dynamics. On the basis of the matched axial dynamics, circular contours will be made circular with accuracies greatly improved. However, because of limitation in the bandwidths of the axial dynamics, there will be radial contour errors. The radial contour error can be further reduced by a simple approach of feedforward compensation. Experiments conducted show the effectiveness of feedforward compensation in improving circular contouring accuracies. © 2008 Elsevier Ltd. All rights reserved.
Source Title: International Journal of Machine Tools and Manufacture
ISSN: 08906955
DOI: 10.1016/j.ijmachtools.2008.12.005
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jan 15, 2019


checked on Jan 7, 2019

Page view(s)

checked on Jan 12, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.