Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 13.FUNCTIONS TO SIMPLIFY PROGRAMMING
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13.1.7 Tapping Cycle (G84)
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.
Format
G84(G98) G84(G99)
G84 X_ Y_ Z_ R_ P_ F_ L_ ;
X_ Y_ : Hole position data
Z_ : 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
F_ : Cutting feedrate
L_ : Number of repents (if required)
Initial level
Point R
P
P
Spindle CCW
Spindle CW
P
P
Point R level
Point
Z
Spindle CCW
Point Z
Point R
Spindle CW
Explanation
- Operation
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.
CAUTION
Feedrate overrides are ignored during tapping. A feed
hold does not stop the machine until the return
operation is completed.
- Dwell
By setting bit 1 (DWL) of parameter No. 6200 to 1, dwell is performed
for the duration specified with P before forward or reverse spindle
rotation. This function is useful when a special tapper is used. (While
dwell operation is being performed with no movement made along the
Z-axis, a tapper performs forward/backward movement for threading
only with a rotational force.)

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