Programming Motion Commands
4.15 Thread cutting with constant lead (G33)
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
4-51
N10 G1 X50 Z0 S500 F100 M3 ;Approach starting point, activate
spindle
N20 G33 X110 Z-60 K4 ;Taper thread: End point on Z and X,
;lead K in Z direction, since angle < 45°
N30 G0 Z0 M30 ;Retraction, end of program
Requirements
Equipment required: speed-controlled spindle with position measurement system.
Operating principle
The control calculates the required feedrate from the programmed spindle speed and the
thread lead. The turning tool traverses across the length of the thread in the longitudinal
and/or facing direction at this feedrate. The feedrate F is not considered for G33, the
limitation to maximum axis speed (rapid traverse) is monitored by the control.
)HHG
/HDG
6SLQGOHVSHHG
Cylinder thread
A cylinder thread is described by the thread length and thread lead.
The thread length is entered in absolute or incremental dimensions with one of the Cartesian
coordinates X, Y, or Z. The Z direction is preferred on turning machines. Allowance must
also be made for the run-in and run-out paths, across which the feed is accelerated or
decelerated.
The thread lead is entered at addresses I, J, K, on turning machines preferentially with K.
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