HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 470)

470 8 Programming: Cycles
8.8 SL c
y
cles
 Milling depth Q1 (incremental value): Distance
between the cylindrical surface and the floor of the
contour.
 Finishing allowance for side Q3 (incremental
value): Finishing allowance on the ridge wall. The
finishing allowance increases the ridge width by
twice the entered value.
 Set-up clearance Q6 (incremental value): Distance
between the tool tip and the cylinder surface.
 Plunging depth Q10 (incremental value): Dimension
by which the tool plunges in each infeed.
 Feed rate for plunging Q11: Traversing speed of the
tool in the tool axis.
 Feed rate for milling Q12: Traversing speed of the
tool in the working plane.
 Cylinder radius Q16: Radius of the cylinder on which
the contour is to be machined.
 Dimension type ? ang./lin. Q17: The dimensions for
the rotary axis of the subprogram are given either in
degrees (0) or in mm/inches (1).
 Ridge width Q20: Width of the ridge to be machined.
Before programming, note the following
In the first NC block of the contour program, always
program both cylinder surface coordinates.
Ensure that the tool has enough space laterally for contour
approach and departure.
The memory capacity for programming an SL cycle is
limited. You can program up to 8192 contour elements in
one SL cycle.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH = 0, the cycle will not be executed.
The cylinder must be set up centered on the rotary table.
The tool axis must be perpendicular to the rotary table. If
this is not the case, the TNC will generate an error
message.
This cycle can also be used in a tilted working plane.
The TNC checks whether the compensated and non-
compensated tool paths lie within the display range of the
rotary axis, which is defined in MP810.x. If the error
message “Contour programming error” is output, set
MP810.x = 0.
Example: NC blocks
63 CYCL DEF 29 CYLINDER SURFACE RIDGE
Q1=-8 ;MILLING DEPTH
Q3=+0 ;ALLOWANCE FOR SIDE
Q6=+0 ;SET-UP CLEARANCE
Q10=+3 ;PLUNGING DEPTH
Q11=100 ;FEED RATE FOR PLUNGING
Q12=350 ;FEED RATE FOR MILLING
Q16=25 ;RADIUS
Q17=0 ;TYPE OF DIMENSION
Q20=12 ;RIDGE WIDTH