Siemens SINUMERIK 840D SL Operating Manual page 355

Parameter Description
Machining
∇ (roughing)
•
∇∇∇ (finishing)
•
Machining direction:
Z0 → Z1
•
Machining from top to bottom
Z1 → Z0
•
Machining from bottom to top
Direction of rotation of the thread:
Right-hand thread
•
A right-hand thread is cut.
Left-hand thread
•
A left-hand thread is cut.
Position of the thread:
Internal thread
•
An internal thread is cut.
External thread
•
An external thread is cut.
NT Number of teeth per cutting edge
Single or multiple toothed milling inserts can be used. The motions required are
executed by the cycle internally, so that the tip of the bottom tooth on the milling insert
corresponds to the programmed end position when the thread end position is reached.
Depending on the cutting edge geometry of the milling insert, the retraction path must
be taken into account at the base of the workpiece.
Machining position:
Single position
•
(only for G code)
Position pattern (MCALL)
•
The positions refer to the center point:
Reference point X – (for single position only)
X0
Reference point Y – (for single position only)
Y0
Reference point Z
Z0
(only for G code)
Z1 End point of the thread (abs) or thread length (inc)
Table Thread table selection:
Without
•
ISO metric
•
Whitworth BSW
•
Whitworth BSP
•
• UNC
Milling
Operating Manual, 02/2012, 6FC5398-7CP40-3BA0
Programming technological functions (cycles)
8.2 Milling
Unit
mm
mm
mm
mm
355