HEIDENHAIN TNC 320 (340 551-02) - Manual (Page 275)

HEIDENHAIN TNC 320 275
8.5 SL Cy
cles
8 Milling depth Q1 (incremental value): Distance
between the cylindrical surface and the floor of the
contour.
8 Finishing allowance for side Q3 (incremental
value): Finishing allowance in the plane of the unrolled
cylindrical surface. This allowance is effective in the
direction of the radius compensation.
8 Set-up clearance Q6 (incremental value): Distance
between the tool tip and the cylinder surface.
8 Plunging depth Q10 (incremental value): Dimension
by which the tool plunges in each infeed.
8 Feed rate for plunging Q11: Traversing speed of the
tool in the tool axis.
8 Feed rate for milling Q12: Traversing speed of the
tool in the working plane.
8 Cylinder radius Q16: Radius of the cylinder on which
the contour is to be machined.
8 Dimension type ? (ANG/LIN) Q17: The dimensions for
the rotary axis (X coordinates) of the subprogram are
given either in degrees (0) or in mm/inches (1).
Before programming, note the following:
In the first NC block of the contour program, always
program both coordinates.
The memory capacity for programming the cycle is limited.
You can program up to 1000 contour elements in one cycle.
The cycle can only be run with a negative depth. If a positive
depth is entered, the TNC will output an error message.
This cycle requires a center-cut end mill (ISO 1641).
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.
Example: NC blocks
63 CYCL DEF 27 CYLINDER SURFACE
Q1=-8 ;MILLING DEPTH
Q3=+0 ;ALLOWANCE FOR SIDE
Q6=+2 ;SET-UP CLEARANCE
Q10=+3 ;PLUNGING DEPTH
Q11=100 ;FEED RATE FOR PLUNGING
Q12=350 ;FEED RATE FOR MILLNG
Q16=25 ;RADIUS
Q17=0 ;TYPE OF DIMENSION