
FANUC AC SPINDLE MOTOR a series
2. FUNCTION EXPLANATION
B–65160E/02
88
Gear signal Parameter number
CTH1A CTH2A 0M/T/TT
Fst.sp
15M/T 15i 16(18)T/M/
TT Fst. sp
0 0 6556 3056 3056 4056 (S1)
0 1 6557 3057 3057 4057 (S1)
1 0 6558 3058 3058 4058 (S1)
1 1 6559 3059 3059 4059 (S1)
[0T/TT Snd. sp, 16 (18) T/TT Snd. sp]
Gear signal Parameter number
CTH1B CTH2B 0M/T/TT
Snd. sp
16(18)T/M/TT
Snd. sp
0 0 6696 4056 (S2)
0 1 6697 4057 (S2)
1 0 6698 4058 (S2)
1 1 6699 4059 (S2)
(8) Parameter setting of ”Position gain”
(a) Intial setting of position gain
In the rigid tapping, the tapping axis and the spindle is controlled
to be synchronized.
So, the position gain of the tapping axis and the spindle must be
set to the same value.
When a built–in motor is being used, the position gain must be
initialized to 3000 (30 sec
–1
). When the spindle is driven by a
gear or belt, the position gain must be initialized to 2000 to 2500
(20 to 25 sec
–1
).
The position gain is subject to change in some circumstances.
(b) In case of Series 0
The position gain parameter of the tapping axis in the rigid tapping
is selected as follows 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
615 (*1)
1 0 0 669
0 1 0 670
0 0 1 671
Turning [T/TT series] and maching [M series]
with surface speed constant