Feedrate scheduling and jerk control algorithm for high-speed CNC machining
by Daping Wan, ShiLong Wang, CaiChao Zhu, Fanming Meng
International Journal of Manufacturing Technology and Management (IJMTM), Vol. 17, No. 3, 2009

Abstract: High-speed CNC machining usually slows down around corners and vibrates so much because of limits on processing large amount of consecutive small line blocks with high speed and inability changing directions fast enough. Aiming at adjusting the feedrate automatically and providing smoother acceleration to achieve maximum productivity, this research presents a feedrate scheduling and jerk control interpolation algorithm to seek the optimal feedrate by evaluating the tool path ahead. After generating a smooth path within error allowance by B-spline fitting algorithm, we calculate the safe, highest, continuous linear velocity while simultaneously accommodating the machine's Acceleration/Deceleration (Acc/Dec) limits. Smooth jerk motion is obtained by modulating the acceleration profiles along the tool path. A look-ahead interpolation scheme is also presented for the purpose of fast controls. Simulation results indicate that the proposed adaptive algorithm speeds feedrates, limits distortion to the programmed path, maintains high speed without sacrificing accuracy while going around corners.

Online publication date: Sat, 21-Mar-2009

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Manufacturing Technology and Management (IJMTM):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com