FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
B–62754EN/01
14. FUNCTIONS TO SIMPLIFY
PROGRAMMING
179
This cycle performs tapping.
In this tapping cycle, when the bottom of the hole has been reached, the
spindle is rotated in the reverse direction.
G84 or G88 (G98 mode) G84 or G88 (G99 mode)
G84 X(U)_ C(H)_ Z(W)_ R_ P_ F_ M_ K_ ;
or
G88 Z(W)_ C(H)_ X(U)_ R_ P_ F_ M_ K_ ;
Point R
Spindle CW
Initial level
Point R levelPoint R
Spindle CCW
Spindle CCW
Spindle CW
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.)
Mα
P1
Mα
Mβ,P2
Mβ,P2
P1
Point Z
Point Z
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.
14.3.2
Front Tapping Cycle
(G84) / Side Tapping
Cycle (G88)
Format
Explanations

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