HEIDENHAIN TNC 426, TNC 430 261
8.4 Cycles for milling pockets, studs and slots
U Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
U Depth Q201 (incremental value): Distance between
workpiece surface and bottom of pocket
U Feed rate for plunging Q206: Traversing speed of
the tool in mm/min when moving to depth. If you are
plunge-cutting into the material, enter a value lower
than that defined in Q207
U Plunging depth Q202 (incremental value): Infeed per
cut. Enter a value greater than 0.
U Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling.
U Workpiece surface coordinate Q203 (absolute
value): Coordinate of the workpiece surface
U 2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
U Center in 1st axis Q216 (absolute value): Center of
the pocket in the reference axis of the working plane
U Center in 2nd axis Q217 (absolute value): Center of
the pocket in the minor axis of the working plane
U First side length Q218 (incremental value): Pocket
length, parallel to the reference axis of the working
plane.
U Second side length Q219 (incremental value): Pocket
length, parallel to the minor axis of the working plane
U Corner radius Q220: Radius of the pocket corner If
you make no entry here, the TNC assumes that the
corner radius is equal to the tool radius.
U Allowance in 1st axis Q221 (incremental value):
Allowance for pre-positioning in the reference axis of
the working plane referenced to the length of the
pocket.
Example: NC blocks
34 CYCL DEF 212 POCKET FINISHING
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q206=150 ;FEED RATE FOR PLUNGING
Q202=5 ;PLUNGING DEPTH
Q207=500 ;FEED RATE FOR MILLING
Q203=+30 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP CLEARANCE
Q216=+50 ;CENTER IN 1ST AXIS
Q217=+50 ;CENTER IN 2ND AXIS
Q218=80 ;FIRST SIDE LENGTH
Q219=60 ;SECOND SIDE LENGTH
Q220=5 ;CORNER RADIUS
Q221=0 ;ALLOWANCE
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