Front Boring Cycle G85 , Side Boring Cycle G89

Front Boring Cycle (G85) / Side Boring Cycle (G89)

This cycle is used to bore a hole.

Format:-

G85 X(U)_ C(H)_ Z(W)_ R_ P_ F_ K_ M_ ;

or

G89 Z(W)_ C(H)_ X(U)_ R_ P_ F_ K_ M_ ;

X_ C_ or Z_ C_  :  Hole position data

Z_ or X_   :  The distance from point R to the bottom of the hole

R_  :  The distance from the initial level to point R level

P_  :  Dwell time at the bottom of a hole

F_  :  Cutting feedrate

K_  :  Number of repeats (When it is needed.)

M_  :  M code for C–axis clamp (When it is needed.)Explanations

After positioning, rapid traverse is performed to point R. Drilling is performed from point R to point Z.

After the tool reaches point Z, it returns to point R at a feedrate twice the cutting feedrate.