Preset and Dwell Group

Preset, G92

This code is used to specify the component datum of the part that will be fixed by the part programmer. This may sometimes be also called as 'Program Zero Point'. The tool will be set at this point and the X,Y and Z coordinate registers of the controller will be initialized to this value. Depending upon the point being touched, the co- ordinate can be specified.

N015 G92 X100.0 Y150.0 Z50.0;

The other codes used for datum setting are G53 to G56. These codes are useful for setting a number of datum positions on the machine table that could be used for machining multiple work pieces.

Dwell, G04

G04 is used to specify a programmed delay in the program. At the point in the program where a G04 code is encountered, the controller stops for the specified time programmed in the block. After the specified delay, the controller automatically continues to execute the next block in the program.

N045 G04 X3.0 - This calls for a stoppage of the control for a period of 3 seconds.

N045 G04 P3000 - This calls for a stoppage of the control for a period of 3 seconds. No decimal point programming with P word address in Fanuc controls.