B–64113EN–1/01
9. SPINDLE SPEED FUNCTION
530
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
surface speed control mode (G96), or for an S command used
to specify maximum spindle speed clamping (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
Number of spindle revolutions
Number of position coder revolutions
Magnification PG2 PG1
1 0 0
2 0 1
Magnification=
4 1 0
8 1 1
GTT Selection of a spindle gear selection method
0 : Type M
1 : Type T