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Fanuc grooving cycle G75

Fundamentals

This cycle does a peck drilling operation for grooving or drilling perpendicular to the axis.

The cycle can actually be used to cut multiple grooves, or (on a machine with a
C-axis and live tools) drill multiple radial holes at various positions along the length,
The explanation here is restricted to cutting a single groove.



Structure

______
G75  R

G75  X  P  F
_______


R= Retreat amount after each peck, radial distance.

X= X coordinate of groove bottom (Diameter to cut). 

P= Peck depth, radial distance in micron.

F= Feed rate.

We can remove material performing single groove same as insert thickness as well as more than that.

Example of single groove as insert thickness



________
G00 X54.0 Z-20.0;

G75 R0.5;

G75 X30.0 P1000 F0.1;

G00 X100.0 Z50.0;
_____

Example of Groove more than insert thickness

Let the groove width is 5mm of the above drowning

________

G00 X54.0 Z-20.0;   (using 3mm insert thickness)

G75 R0.5;

G75 X30.0 Z-25.0 P1000 Q2500 F0.1; 

G00 X100.0 Z50.0;
_____
 
Note:- As mention on above example we have added two additional properties like

Z- As Z coordinate of groove width.

Q- As shifting value of insert incrementally after a single cut.


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