HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 384)

384 DIN Programming
4.29 Other G codes
Deactivate zero-point shifts G920
G920 deactivates the workpiece zero point and zero-point shifts.
Traverse paths and position values are referenced to the distance
tool tip—machine zero point.
Deactivate zero-point shifts, tool lengths G921
G921 deactivates the workpiece zero point, zero-point shifts and tool
dimensions. Traverse paths and position values are referenced to the
slide reference point—machine zero point.
End position of tool G922
With G922 you can position the active tool to a defined angle.
Fluctuating spindle speed G924
To reduce resonant vibrations you can use G924 to program a
changing spindle speed. In G924 you define the time interval and the
range for the speed change. The G924 function is automatically reset
at the end of the program. You can also deactivate the function
through another call with the setting H=0 (off).
Parameters
C
Angular position for tool orientation
Parameters
Q
Spindle number (machine-dependent)
K Repetition rate: Time interval in hertz (repetitions per
second)
I Change of spindle speed
H Switch on/off the G924 function
 0: Off
 1: On