
18. SPINDLE FUNCTIONS
B–63443EN/02
PMC INTERFACE
204
3771 Minimum spindle speed in constant surface speed control mode (G96)
[Data type] Word
[Unit of data] min
–1
[Valid data range] 0 to 32767
Set the minimum spindle speed in the constant surface speed control
mode (G96).
The spindle speed in constant surface speed control is clamped to the
speed given by parameter 3771.
3772 Maximum spindle speed
[Data type] Word
[Unit of data] min
–1
[Valid data range] 0 to 32767
This parameter sets the maximum spindle speed.
When a command specifying a speed exceeding the maximum spindle
speed is specified, or the spindle speed exceeds the maximum speed
because of the spindle speed override function, the spindle speed is
clamped at the maximum speed set in the parameter.
Number Message Description
190 ILLEGAL AXIS SELECT In the constant surface speed control,
the axis specification is wrong. (See pa-
rameter No. 3770.) The specified axis
command (P) contains an illegal value.
Correct the program.
CAUTION
If the spindle speed corresponding to the calculated surface
speed exceeds the speed specified in the spindle speed
clamp command (G50S_) during the G96 mode, the actual
spindle speed is clamped at the value specified in the
spindle speed clamp command.
If the specified spindle speed is lower than the value
specified in parameter No. 3771, the actual spindle speed
is clamped at the specified speed.
Alarm and message
Caution