
B–65160E/02
2. FUNCTION EXPLANATION
FANUC AC SPINDLE MOTOR a series
91
Turning [T/TT series] and maching [M series]
with surface speed constant
Gear selection signal
Fst. sp Snd. sp
Parameter NO
GR1 GR2 GR21 T/TT M
5280 (*1)
0 0 0 5281
1 0 1 5282
0 1 –– 5283
1 1 –– 5284 5283
(*1) When this parameter is ”0”, each gear parameter becomes valid.
When this parameter is not ”0”, each gear parameter becomes
invalid, and this parameter is always used.
The position gain parameter of the spindle in the rigid tapping is
selected as follows according to hte gear selection signal
(CTH1A/B, CTH2A/B). (This is common T series and M series)
[Fst. sp]
Gear signal
CTH1A CTH2A
Parameter NO
0 0 4065 (S1)
0 1 4066 (S1)
1 0 4067 (S1)
1 1 4068 (S1)
[Snd. sp]
Gear signal
CTH1B CTH2B
Parameter NO
0 0 4065 (S2)
0 1 4066 (S2)
1 0 4067 (S2)
1 1 4068 (S2)
Take care to input the gear selection signal GR1, GR2, GR21,
GR1O, GR2O, GR3O and CTH1A/B, CTH2A/B according to
the real gear state in order to get the same position gain of the
tapping axis and that of the spindle, because GR1, GR2, GR21,
GR1O, GR2O, GR3O and CTH1A/B, CTH2A/B are inputted
independently. Set to 0 for parameter which is not used.