
Title
90A3 / 90A7 / 90B3 / 90B7
Learning Control Operator’s Manual
03 ’05.01.13 K.Maeda 3
rd
. updated Draw No.
02 '03.01.06 K.Maeda 2
nd
. updated
A - 63639E - 070
01 ’00.09.20 K.Maeda Newly designed Sheet 010
Edit Date Design Description / 081
4. Explanation of Learning Control
4.1 Summary of Learning Control
What is “Learning Function” ?
It is a function for realizing high-speed and high-precision cutting by using Learning Control (Repetitive
Control) or Preview Repetitive Control. Preview Repetitive control is the superset for Learning control.
So one of each is necessary not both to set ordering.
Configuration of Learning function
Learning Control (Repetitive Control) is realized by Learning controller. And Preview Repetitive Control is
realized by combination with Learning controller and Adaptive Preview controller.
Feature of Control
Learning controller minimizes the error by learning the repetitive command of specific period or the
disturbance synchronized with command period. And Adaptive Preview controller follows rapidly the
command by means of doing the best suited feed-forward control decided by Adaptive control.
When is “Preview Repetitive control” applied ?
The convergence of error (Learning speed) by Preview Repetitive control is faster than that by only
Learning controller. Learning control can be applied even for the case which the periodic command
change gradually the shape. If the change of the shape is comparatively rapid and large, you should adopt
Preview Repetitive control.
FANUC Learning function
Learning control
Preview Repetitive
control
Learning
controller
Adaptive Preview
controller
Learning
controller