HEIDENHAIN CNC Pilot 4290 Description of the Y axis - Manual (Page 4)

Y Axis 4
2
Y
Axis
in
DIN
PLUS
2 Y Axis in DIN PLUS
Milling depth, contour position
You must 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 P” in the previously programmed G308
■ Alternatively on figures: Cycle parameter ”depth P”
The algebraic sign of ”depth P” defines the position of the milling
contour:
■ P<0: Pocket
■ P>0: Island
This table shows the relationship between the section code, the
sign of ”depth P” and the position of the milling contour. The
milling cycles machine from the ”surface” toward the ”milling
floor.”
Section P Surface Milling floor
FRONT_Y P<0 Z Z+P
FRONT_Y P>0 Z+P Z
REAR_SIDE_Y P<0 Z Z–P
REAR_SIDE_Y P>0 Z–P Z
SURFACE_Y P<0 X X+(P*2)
SURFACE_Y P>0 X+(P*2) X
X: Reference diameter from the section code
Z: Reference plane from the section code
P: ”Depth” from G308 or from the cycle parameters
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.
YZ plane (SURFACE_Y):
■ The ”depth P” refers to the ”reference diameter”.
■ If the contour is milled on a previously machined
surface, the surface is considered a ”reference
diameter”.
Y_4290BH.pm6 08.03.2005, 08:35 4