2.9.11 Tapping without compensating chuck
2.9.11.1 Tapping without compensating chuck and retraction motion (G331, G332)
For tapping without compensating chuck, using the G331 and G332commands, the following
traversing motion is executed:
● G331: Tapping in the tapping direction up to the end of thread point
● G332: Retraction motion up to the tapping block G331 with automatic spindle direction of
rotation reversal
Syntax
G331 <axis> <thread pitch>
G331 <axis> <thread pitch> S...
G332 <axis> <thread pitch>
Meaning
G331: Tapping
The tapped hole is defined by the traversing motion of the axis (drilling depth)
and the thread pitch.
Effectiveness: Modal
G332: Retraction motion when tapping
Retraction motion must have the same pitch as when tapping (G331). The
direction of rotation of the spindle is reversed automatically.
Effectiveness: Modal
<axis>: Traversing distance/position of the geometry axis (X, Y or Z) at the end of the
thread, e.g. Z50
<Thread pitch>:
Thread pitch I (X), J (Y) or K (Z):
● Positive pitch: Right-handed thread, e.g. K1.25
● Negative pitch: Left-handed thread, e.g. K-1.25
Range of values: ±0.001 to ±2000.00 mm/revolution
S...: Spindle speed
The last active spindle speed is used if a spindle speed is not specified.
Note
Second gear-stage data block
To achieve effective adaptation of spindle speed and motor torque and be able to accelerate
faster, a second gear-stage data block for two further configurable switching thresholds
(maximum speed and minimum speed) can be preset in axis-specific machine data deviating
from the first gear step data block and also independent of these speed switching thresholds.
The specifications of the machine manufacturer must be observed.
For further information see the "Axes and Spindles" Function Manual.
Fundamentals
2.9 Motion commands
NC programming
240 Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
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