Front Tapping Cycle (G84) , Side Tapping Cycle (G88)

Front Tapping Cycle (G84) / Side Tapping Cycle (G88):-

This cycle performs tapping.

<!--[if !vml]--><!--[endif]-->In this tapping cycle, when the bottom of the hole has been reached, the spindle is rotated in the reverse direction.

Format:-

G84 X(U)_ C(H)_ Z(W)_ R_ P_ F_ K_ M_ ;

or

G88 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:-

                      Tapping is performed by rotating the spindle clockwise. When the bottom of the hole has been reached, the spindle is rotated in the reverse direction for retraction.  This operation creates threads.

Feedrate overrides are ignored during tapping. A feed hold does not stop the machine until the return operation is completed

Examples:-

M51  ;                       Setting C–axis index mode ON

M3 S2000 ;               Rotating the drill

G00 X50.0 C0.0 ;       Positioning the drill along the X– and C– axes

G83 Z–40.0 R–5.0 P500 F5.0 M31 ;   Drilling hole 1

C90.0 M31 ;              Drilling hole 2

C180.0 M31 ;            Drilling hole 3

C270.0 M31 ;            Drilling hole 4

G80 M05 ;    Canceling the drilling cycle and stopping drill rotation

M50 ;           Setting C–axis index mode off