10. Spindle Functions
10.4 Spindle Clamp Speed Setting; G92
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10.4 Spindle Clamp Speed Setting; G92
Function and purpose
The maximum clamp speed of the spindle can be assigned by address S following G92 and the
minimum clamp speed by address Q.
Command format
G92 S__ Q__;
S
: Maximum clamp speed
Q
: Minimum clamp speed
Detailed description
(1) Besides this command, parameters can be used to set the rotational speed range up to 4
stages in 1 r/min units to accommodate gear selection between the spindle and spindle motor.
The lowest upper limit and highest lower limit are valid among the rotational speed ranges
based on the parameters and based on G92 Ss Qq ;
(2) Set in the parameter "#1146 Sclamp" or "#1227 aux11/bit5" whether to carry out rotation speed
clamp only in the constant surface speed mode or even when the constant surface speed is
canceled.
(Note1) G92S command and speed clamp operation
Sclamp = 0
Sclamp = 1
aux11/bit5 = 0
aux11/bit5 = 1
aux11/bit5 = 0
aux11/bit5 = 1
In G96
SPEED CLAMP COMMAND
SPEED CLAMP COMMAND
Command
In G97
SPINDLE SPEED COMMAND
SPEED CLAMP COMMAND
In G96
SPEED CLAMP EXECUTION
SPEED CLAMP EXECUTION
Operation
In G97
NO SPEED CLAMP
SPEED CLAMP
EXECUTION
NO SPEED
CLAMP
(Note2) The address Q following the G92 command is handled as the spindle speed clamp
speed regardless of the constant surface mode.
(3) The command value of spindle clamp speed will be cleared by modal reset (reset2 or reset &
rewind).
Note that the modal is retained if the parameter “#1210 RstGmd / bit19” is ON.
Precautions
(1)
Once the maximum clamp speed and the minimum clamp speed are set, the maximum clamp speed will
not be canceled even if the command such as “G92 S0” is issued.
Even when “G92 S0” is commanded, the value of Qq is kept valid and S value (S0) falls below Q value
(Qq). Thus, Qq will be handled as the maximum clamp speed and S0 as the minimum clamp speed.