Siemens SINUMERIK 840D sl Programming Manual page 261

• SPOS (or M70) only has to be programmed prior to tapping:
-
-
Conversely, when machining multiple threads one after the other, SPOS (or M70) does not
have to be programmed (advantage: saves time).
• The spindle speed has to be in a dedicated G331 block without axis motion before tapping
(G331 X... Y... Z... I... J... K...).
Meaning
G331:
G332:
X... Y... Z... : Drilling depth (end point of the thread in Cartesian coordinates)
I... :
J... :
K... :
Note
After G332 (retraction), the next thread can be tapped with G331.
Note
Second gear-stage data record
To achieve effective adaptation of spindle speed and motor torque and be able to accelerate
faster, a second gear-stage data record 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 record and also independent of these speed switching
thresholds. Please see the machine manufacturer's specifications for further details.
References:
Function Manual, Basic Functions; Spindles (S1), Chapter: "Configurable gear adaptations".
Fundamentals
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
For threads requiring multiple machining operations for their production
For production processes requiring a defined thread starting position
Command: Tapping
The hole is defined by the drilling depth and the thread lead.
Effective:
Command: Tapping retraction
This movement is described with the same lead as the G331
movement. The direction of rotation of the spindle is reversed
automatically.
Effective:
Thread lead in X direction
Thread lead in Y direction
Thread lead in Z direction
Value range of lead:
9.12 Tapping without compensating chuck (G331, G332)
modal
modal
±0.001 to 2000.00 mm/rev
Motion commands
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