Haas Mill G77 Back Bore Canned Cycle

Haas G Codes Mill Reference

G77 Back Bore Canned Cycle (Group 09)

F Feedrate in inches (or mm) per minute
I Shift value along the X-axis before retracting, if Q is not specified
J Shift value along the Y-axis before retracting, if Q is not specified
L Number of holes to bore if G91 (Incremental Mode) is used
Q The shift value, always incremental
R Position of the R plane (position above the part)
X X-axis location of hole
Y Y-axis location of hole
Z Position of the Z-axis at the bottom of hole

In addition to boring the hole, this cycle shifts the X and/or Y axis prior to and after cutting in order to clear the tool while entering and exiting the part (see G76 for an example of a shift move). Setting 27 determines the shift direction. If Q is not specified, optional I and J values are used to determine shift direction and distance.

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G77 Back Bore Canned Cycle