
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 034
Edit Date Design Description
/ 081
final cycle.
Servo software judges the final cycle by the Learning count (No.2242, No.2235, or etc).
Data range : 0 to 700 stepping up every 50 (When Velocity 0.5msec)
0 to 350 stepping up every 25 (When Velocity 1msec)
Standard : Refer to Appendix 3. Parameter table for Learning control.
FBND decide the band-width of Learning controller, so the higher the better as far as being stable. The
maximum value in the range where there is no vibration is set. Be careful, if the command by user
includes the high frequency spectrum exceeds FBND, the error of the frequency spectrum does not
converge.
(Note) If you set 0, no learning is performed. You can disable Learning control without power off.
Data range : 0 to 20
Standard : Refer to Appendix 3. Parameter table for Learning control.
Data range : 0 to GODMX
Standard : Refer to Appendix 3. Parameter table for Learning control.
(Note) In case of Expanded Gx being enable (No.2008#3 = 1) , set GXDMN to 0.
Data range : 0 to 128
Standard : 64 (When No.2008#3 = 0)
(Note) In case of Expanded Gx being enable (No.2008#3 = 1), Refer to
Appendix 3. Parameter table for Learning control.
Dynamic characteristic compensation Gx is composed from three parameters No.2246, No.2247, No.2248,
which symbols are GODMX, GODMN, GCOEF respectively. Furthermore six successive parameters from
No.2248 to No.2253 are named Expanded Gx. Attention to No.2248 double assigned by both Gx and
Expanded Gx. Either of Gx or Expanded Gx is to be active, not both.
In usual case you need not to change Gx or Expanded Gx from Appendix 3. Parameter table for Learning
control so long as the accuracy convergence problem doesn’t occur.
If it occurs, you need to tune three parameters of Gx after reset EXGX (No.2008#3) to zero. Due to many
parameters of Expanded Gx, it is recommended to disable it by EXGX=0.
Gx improves the characteristic of controlled object. GODMX and GODMN improve the phase characteristics
of controlled object. The greater both values are, The more advance value of phase it have. GCOEF is the
compensation parameter to improve the gain characteristics of controlled object. As the values are greater,
the value of gain gets greater. There is a predetermined parameter set fit to each properties of the motor such
as velocity gain and position gain. If there is not a parameter set you want to use, please consult to Kyushu
branch office, Servo Laboratory through the charged person of your nearest FANUC or GEFanuc office.
2244
FBND Frequency band of low pass filter [Hz]
2246
GODMX Maximum order of Gx
2247
GODMN Minimum order of Gx
2248
GCOEF / EXGXK1 Coefficient of Gx / Coefficient 1 of expanded Gx