Contour Milling; General Information - Siemens SINUMERIK 840D sl Operating Manual

Programming technology functions (cycles)

10.5 Contour milling

Parameter Description
Peripheral surface Y: The positions refer to the reference point:
C0 Positioning angle for machining surface – (only for single position)
Y0 Reference point Y
Z0 Reference point Z
X0 Reference point X
(only ShopTurn)
Z1 Engraving depth (abs) or referenced depth (inc)
W Character height
DX1 or α2 Distance between characters or angle of opening – (for curved alignment only)
DX1 or DX2 Distance between characters or total width – (for linear alignment only)
α1 Text direction (for linear alignment only)
XM or LM Center point X (abs) or center point length polar
(only G code) – (for curved alignment only)
YM or αM Center point Y (abs) or center point angle polar
(only G code) – (for curved alignment only)
YM or CM Center point Y or C (abs.) – (for curved alignment only)
(only ShopTurn)
- (only for machining surface, peripheral surface C/Y)
ZM Center point Z (abs.) – (for curved alignment only)
(only ShopTurn)
- (only for machining surface, peripheral surface C/Y)
* Unit of feedrate as programmed before the cycle call
10.5 Contour milling
10.5.1

General information

Function
You can mill simple or complex contours with the "Contour milling" cycle. You can define open
contours or closed contours (pockets, islands, spigots).
A contour comprises separate contour elements, whereby at least two and up to 250 elements
result in a defined contour. Radii, chamfers and tangential transitions are available as contour
transition elements.
The integrated contour calculator calculates the intersection points of the individual contour
elements taking into account the geometrical relationships, which allows you to enter
incompletely dimensioned elements.
With contour milling, you must always program the geometry of the contour before you program
the technology.
504
Unit
Degrees
mm
mm
mm
mm
mm
mm or
Degrees
mm
Degrees
mm
mm
mm or de‐
grees
mm
Operating Manual, 05/2017, A5E40868721
Turning