
B–65160E/02
2. FUNCTION EXPLANATION
FANUC AC SPINDLE MOTOR a series
87
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
0 0 0 5221
1 0 1 5222
0 1 –– 5223
1 1 –– 5224 5223
D Set the gear teeth number of the position coder side.
Each parameter is selected according to the gear selection signal.
Standard machining: GR3O, GR2O, GR1O
Turning and maching with surface speed constant option: GR2,
GR1
Second spindle of turning: GR21
(Multi– spindle control option is needed)
Standard machining [M series]
Gear signal
GR1O GR2O GR3O
Parameter NO
1 0 0 5231
0 1 0 5232
0 0 1 5233
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
0 0 0 5231
1 0 1 5232
0 1 –– 5233
1 1 –– 5234 5233
(7) Parameter setting ofHGear ratio between the spindle and the
motorI
The loop gain constant parameter is not used in the aseries (Serial)
spindle system.
HGear ratio between the spindle and the motorIparameter should be
set instead of it.
Each parameter is selected according to the gear selection signal
(CTH1A/ B, CTH2A/ B) .
About the setteing data, refer to the 3. parameter explanation.
[0M/T/TT Fst. sp, 15M/T, 15i, 16i/16 T/M/TT Fst. sp]