WIT Press


Measuring And Modelling Heat Transfer And Thermal Errors On A Ballscrew Feed Drive System

Price

Free (open access)

Paper DOI

10.2495/LAMDAMAP030301

Volume

44

Pages

12

Published

2003

Size

382 kb

Author(s)

S. Fletcher & D.G. Ford

Abstract

Machine tool axes continue to employ rotary encoders mounted on the drive motors for position feedback. With this method the accuracy of the ballscrew determines the positional accuracy. Errors associated with expansion of the ballscrew caused by internally generated heat are well documented and have been found to be significant. The accuracy demands on even low cost machine tools continues to increase, requiring the manufacturing industry to invest more effort in understanding the capabilities of their machines. Many companies regularly calibrate machne tools using quick check Ballbar techques or, perhaps less frequently, laser interferometry to quantify the errors. However, thermal errors associated with operation of the machme are not normally indicated using these techniques. The IS0230 part3 standa

Keywords