Constant Surface Speed Control; G96, G97; Constant Surface Speed Control - Mitsubishi Electric MELDAS C6 Programming Manual

10. Spindle Functions

10.5 Constant surface speed control; G96, G97

10.5.1 Constant surface speed control

Function and purpose
These commands automatically control the spindle speed in line with the changes in the radius
coordinate values as cutting proceeds in the diametrical direction, and they serve to keep the
cutting point speed constant during the cutting.
Command format
G96 Ss Pp; Constant surface speed ON
Ss
Pp
G97 ; Constant surface speed cancel
Detailed description
(1) The constant surface speed control axis is set by parameter "#1181 G96_ax".
0 : Fixed at 1st axis (P command invalid)
1 : 1st axis
2 : 2nd axis
3 : 3rd axis
(2) When the above-mentioned parameter is not zero, the constant surface speed control axis
can be assigned by address P.
(Example) With G96_ax (1)
(3) Example of selection program and operation
G90 G96 G01 X50. Z100. S200 ;
G97 G01 X50. Z100. F300 S500 ;
M02 ;
(4) Constant surface speed control can be commanded on the selected spindle (nth spindle) / the
2nd spindle.
Select which spindle (the selected spindle or 2nd one) the commands are made to by the
spindle selection G codes (G43.1 and G44.1).
Select which spindle (the selected spindle or 2nd one) is valid as the initial state with the
parameter (base specifications parameter "#1199 Sselect").
(5) Select whether calculating the surface speed at rapid traverse command is performed
constantly or only at the block end poing.
: Surface speed (1 to 99999999 m/min)
: Assignment of constant surface speed control axis
Program Constant surface speed control axis
G96 S100 ;
G96 S100 P3 ;
80
10.5 Constant surface speed control
1st axis
3rd axis
The spindle speed is controlled so that the peripheral
speed is 200m/min.
The spindle speed is controlled to 500r/min.
The modal returns to the initial setting.