G96/G97:Constant Surface Speed Control On/Off
|
Format: |
G96 S___ |
G96: Constant surface speed control On
S: Surface speed. Unit: m/min or ft/min
|
Format: |
G97 S___ |
G97: Constant surface speed control Off
S: Spindle speed. Unit: rpm/min.
During a turning operation, when it is necessary to maintain a constant surface speed, the surface speed should be specified using G96. The spindle speed is automatically adjusted based on the X-axis absolute coordinate in such a way that the surface speed is kept constant. Therefore, for these codes to function correctly, the X-axis must be zeroed at the center of the workpiece. The relationship between the spindle speed, surface speed, and the X-axis absolute coordinate is as follows:
N: Spindle speed
V: Surface speed
D: Distance to the part center (X-axis absolute position)
To prevent the spindle speed from increasing excessively as it approaches lower diameters, the G92 S_ codes can be used. These codes allow for setting the maximum spindle speed.
When the G96 code is used together with the G95 code, the spindle speed must be specified by adding an S code next to the G95 code.