C-Axis Contours - Fundamentals; Position Of Milling Contours - HEIDENHAIN CNC PILOT 640 User Manual

DIN/ISO programming | C-axis contours – fundamentals
4.6 C-axis contours – fundamentals

Position of milling contours

Define the reference plane or the Reference diameter in the
section code.
Specify the Depth and Position of a milling contour (pocket, island)
in the contour definition:
With Depth/Height P programmed in the previous G308 cycle
Alternatively on figures: Cycle parameter Depth P
The algebraic sign of P defines the Position of the milling contour:
P < 0: Pocket
P > 0: Island
Position of milling contour
P
Section
FRONT P < 0
P > 0
REAR SIDE P < 0
P > 0
LATERAL P < 0
P > 0
X: Reference diameter from the section code
Z: Reference plane from the section code
P: Depth/Height from G308 or from cycle parameter
The area milling cycles mill the surface specified in the
contour definition.
taken into consideration.
Contours in more than one plane (hierarchically nested contours):
A plane begins with G308 and ends with G309
G308 defines a new reference plane/Reference diameter.
The first G308 uses the reference plane defined in the section
code. Each following G308 defines a new plane. Calculation:
New reference plane = Reference plane + P (from previous
G308)
G309 switches back to the previous reference plane.
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
Surface Milling floor
Z Z + P
Z + P Z
Z Z – P
Z – P Z
X X + (P * 2)
X + (P * 2) X
Islands within this surface are not
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