
B–64113EN–1/01
9. SPINDLE SPEED FUNCTION
578
Refer to 9.3 “Spindle speed Control”.
Refer to the manual of serial spindle.
These signals determine what parameter (loop gain, etc.) to be used for
each gear position.
CTH1A and CTH2A are the gear select signals for the serial spindle, but
GR1 and GR2 must also be set. Do not change these signals while in the
Cs contour control mode.
Relationship between gears selected and spindle gear select signals
CNC side
T/M series with CSSC M series without CSSC
GR2 GR1 Gear selection GR3O GR2O GR1O Gear selection CTH1A CTH2A Gear selection
0 0 1st stage 0 0 1 1st stage 0 0 1st stage
0 1 2nd stage 0 1 0 2nd stage 0 1 2nd stage
1 0 3rd stage 1 0 0 3rd stage 1 0 3rd stage
1 1 4th stage 1 1 4th stage
CSSC: Constant surface speed control
NOTE
1 When the M series does not include the constant surface
speed control, and parameter No. 3706#4 GTT=0, GR1 and
GR2 do not need to be input. Input CTH1A and CTH2A
when gears are changed using GR1O, GR2O and GR3O.
2 The above combination of clutch/gear signals CTH1A and
CTH2A is an example.
The serial spindle gear is selected by CHT1A and CHT2A
independently of gear selection on the CNC side. So, enter
necessary signals, and set the corresponding serial spindle
parameters.
Other signals
Gear select signal (Input)
GR1, GR2, <G028#1, #2>
Gear select signal
(Output)
GR3O, GR2O, GR1O
<F034#2, #1, #0>
(M series)
Clutch/Gear signal
(Serial spindle)
CTH1A, CTH2A
<G070#3, #2>