Siemens SINUMERIK 840DE

Programming Motion Commands
4.15 Thread cutting with constant lead (G33)
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
4-49
Programming
Cylinder thread
G33 Z… K … SF=…
Face thread
G33 X… I… SF=…
Taper thread
G33 X… Z… K… SF=…
Or
G33 X… Z… I… SF=…
Parameters
G33 Thread cutting with constant speed
X Y Z End point in Cartesian coordinates
I Thread lead in X direction
J Thread lead in Y direction
K Thread lead in Z direction
Z Longitudinal axis
X Transverse axis
Z... K... The thread length and thread lead for cylinder threads
X... I... Thread diameter and thread lead for face threads
I... K... The dominant direction share for tape thread in X or Z
K (taper thread) Lead angle <45°, thread lead in longitudinal direction
I (taper thread) Lead angle >45°, thread lead in transverse direction
I... or K... I or K can be stated at thread lead = 45°
SF= Starting point offset, only needed for multiple threads
Example of double cylinder thread with start point offset
Machining a double cylindrical thread in offset steps with starting point offset 180°.