HEIDENHAIN TNC 320 (340 55x-03) - Manual (Page 272)

272 8 Programming: Cycles
8.3 Cy
cles f
o
r Milling P
o
c
k
ets, St
uds and Slots
 Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
 Depth Q201 (incremental value): Distance between
workpiece surface and bottom of pocket.
 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.
 Plunging depth Q202 (incremental value): Infeed per
cut.
 Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling.
 Workpiece surface coordinate Q203 (absolute
value): Coordinate of the workpiece surface.
 2nd set-up clearance Q204 (incremental value):
Coordinate in the spindle axis at which no collision
between tool and workpiece (clamping devices) can
occur.
 Center in 1st axis Q216 (absolute value): Center of
the pocket in the reference axis of the working plane.
 Center in 2nd axis Q217 (absolute value): Center of
the pocket in the minor axis of the working plane.
 Workpiece blank diameter Q222: Diameter of the
premachined pocket for calculating the pre-position.
Enter the workpiece blank diameter to be less than
the diameter of the finished part.
 Finished part diameter Q223: Diameter of the
finished pocket. Enter the diameter of the finished
part to be greater than the workpiece blank diameter
and greater than the tool diameter.
Example: NC blocks
42 CYCL DEF 214 C. 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 1ST AXIS
Q217=+50 ;CENTER 2ND AXIS
Q222=79 ;WORKPIECE BLANK DIA.
Q223=80 ;FINISHED PART DIA.