CIRP Encyclopedia of Production Engineering

2019 Edition
| Editors: Sami Chatti, Luc Laperrière, Gunther Reinhart, Tullio Tolio


  • Burak SencerEmail author
Reference work entry



This essay presents feed drive control systems used in modern CNC machine tools. Considering the rigid body motion of the feed drive, widely used control algorithms such as P-PI and PID control are being introduced. At last, the sliding mode control algorithm is presented, and its performance against the conventional PID control is shown.


In general context, a control system is a device to manage, command, or regulate the behavior of another device or a system. In CNC machine tool systems, the objective of the control system is to regulate the actual position of the feed drive to follow the reference motion trajectory programmed by the user. Hence, the control law on a machine tool tries to minimize deviation of the drive position x m( t) from the commanded position x r( t).
$$ e(t)={x}_r(t)-{x}_m(t) $$
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Copyright information

© CIRP 2019

Authors and Affiliations

  1. 1.College of EngineeringOregon State UniversityCorvallisUSA

Section editors and affiliations

  • Hans-Christian Möhring
    • 1
  1. 1.Institut für WerkzeugmaschinenUniversität StuttgartStuttgartGermany