HEIDENHAIN CNC Pilot 4290 Pilot - Manual (Page 26)

26
Ov
er
lapped cont
ours
Start of pocket/island G308-Geo
G308 defines a new reference level/reference diameter for
hierarchically nested front face or lateral surface contours.
Parameters
P:
Depth for pocket, height for islands
The algebraic sign of ”Depth P” defines the position of the milling
contour:
■ P<0: Pocket
■ P>0: Island
Section P Surface Milling floor
FRONT END P<0 Z Z+P
FRONT END P>0 Z+P Z
REAR END P<0 Z Z–P
REAR END P>0 Z–P Z
CYLINDER SURFACE P<0 X X+(P*2)
CYLINDER SURFACE P>0 X+(P*2) X
The milling cycles machine from the ”surface” toward the ”milling
floor.”
X: Reference diameter from the section code
Z: Reference plane from the section code
P: ”Depth” from G308 or from the cycle parameters
End pocket/island G309-Geo
G309 ends a reference level. Every reference plane defined with G308
must be ended with G309!
• Note with ”P”: the addition of a negative
number reduces the result, and the
subtraction of a negative number increases
the result.
• Island: The area-milling cycles machine
the complete area specified in the contour
definition. Islands that are defined within
this area are not considered.