
Manual Guide M Cycle Programming
GE Fanuc Automation S.A. - 55 -
GFKE-0046-EN/01
3. 3. 2 Left-handed Tapping Cycle
G74
This cycle performs 'Left-handed' tapping. In this
tapping cycle, spindle rotation starts counter
clockwise, CCW. When the bottom of the hole has
been reached, the spindle rotates in the normal
direction.
By pushing [REVTAP], the following items are
displayed.
Z POINT DISTANCE
In the case G90 (Absolute = Default)
- the Z axis position of the bottom of the hole
In the case G91 (Incremental)
- the distance from point R to the bottom of the hole
R POINT DISTANCE
In the case G90 (Absolute = Default)
- the Z axis position of point R level
In the case G91 (Incremetal)
- the distance from the initial level to point R level
FEED RATE
Cutting feed rate for drilling
Return to Initial level Return to R-level
G74 (G98)
Initial level
Point Z
Point R
Spindle CW
P
P
Spindle CCW
G74 (G99)
Point R
Point Z
Point R level
Spindle CCW
P
P
Spindle CW