Siemens SINUMERIK 828D Programming Manual page 272

Motion commands
9.12 Tapping without compensating chuck (G331, G332)
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".
Examples
Example 1: G331 and G332
Program code
N10 SPOS[n]=0
N20 G0 X0 Y0 Z2
N30 G331 Z-50 K-4 S200
N40 G332 Z3 K-4
N50 G1 F1000 X100 Y100 Z100 S300 M3
N60 M30
Example 2: Output the programmed drilling speed in the current gear stage
Program code
N05 M40 S500
...
N55 SPOS=0
N60 G331 Z-10 K5 S800
272
Comment
; Prepare tapping.
; Approach starting point.
; Tapping, drilling depth 50, lead K
negative = counterclockwise spindle
rotation.
; Retraction, automatic reversal of
direction.
; Spindle operates in spindle mode
again.
; End of program.
Comment
; Gear stage 1 is engaged since the programmed
spindle speed of 500 rpm is in the range between 20
and 1,028 rpm.
; Align spindle.
; Machine thread, spindle speed is 800 rpm in gear
stage 1.
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals