
B--63003EN--1/02
9. SPINDLE SPEED FUNCTION
726
GST: The SOR signal is used for:
0 : Spindle orientation
1 : Gear shift
SGB: Gear switching method
0 : Method A (Parameters No. 3741 to 3743 for the maximum spindle
speed at each gear are used for gear selection.)
1 : Method B (Parameters No. 3751 and 3752 for the spindle speed at the
gear switching point are used for gear selection.)
SGT: Gear switching method during tapping cycle (G84 and G74)
0 : Method A (Same as the normal gear switching method)
1 : Method B (Gears are switched during tapping cycle according to the
spindle speed set in parameters No. 3761 and 3762).
EVS When the spindle control function (S analog output or S serial output) is
used, S codes and SF are:
0 : Not output for an S command.
1 : Output for an S command.
NOTE
The output of S codes and SF for an S command in constant
sur fac e speed control mode ( G96), or for an S comm and used
to specif y maxim um spindl e speed clampi ng (G50S------;)
depends on the setting of bit 0 (ESF) of parameter No. 3705.
NSF: When an S code command is issued in constant surface speed control,
0 : SF is output.
1 : SF is not output.
SFA: The SF signal is output:
0 : When gears are switched
1 : Irrespective of whether gears are switched
#7 #6 #5 #4 #3 #2 #1 #0
TCW3706
TCW
CWM
CWM
ORM
ORM GTT
PG2
PG2
PG1
PG1
[Data type] Bit
PG2, PG1 Gear ratio of spindle to position coder
Spindle speed
Number of position coder revolutions
Magnification PG2 PG1
×100
×201
Magnification=
×410
×811
GTT Selection of a spindle gear selection method
0 : Type M
1 : Type T