Velocity feed forward

The innovative features of Velocity Feed Forward (VFF) in addressing the demands of high-speed machining are discussed. VFF, also called zero following, feed forward or velocity feed, is intended to decrease following error and achieve higher path accuracy at high contouring feed rates. The following error is measured by the velocity and position loop gain in the computer numerical control for every axis.
The demand for high-speed machining has driven CNC machine tool builders to push their machines' drive systems to ever higher levels of performance to achieve higher contouring feedrates. Unfortunately there [...]