HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 195)

179 HEIDENHAIN TNC 410, TNC 426, TNC 430
Before programming, note the following:
The algebraic sign for the depth parameter determines
the working direction.
If you want to clear and finish the stud with the same
tool, use a center-cut end mill (ISO 1641) and enter a low
feed rate for plunging.
ú Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
ú Depth Q201 (incremental value): Distance between
workpiece surface and bottom of stud
ú 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 low value; if
you have already cleared the stud, enter a higher feed
rate.
ú Plunging depth Q202 (incremental value):
Infeed per cut; enter a value greater than 0.
ú Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling.
ú Workpiece surface coordinate Q203 (absolute value):
Coordinate of the workpiece surface
ú 2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
ú Center in 1st axis Q216 (absolute value): Center of the
stud in the main axis of the working plane
ú Center in 2nd axis Q217 (absolute value): Center of the
stud in the secondary axis of the working plane
ú Workpiece blank diameter Q222: Diameter of the
premachined stud. Enter the workpiece blank
diameter to be greater than the diameter of the
finished part.
ú Diameter of finished part Q223: Diameter of the
finished stud. Enter the diameter of the finished part
to be less than the workpiece blank diameter.
8.4 Cy
cles f
or Milling P
o
c
k
ets,
St
uds and Slots
X
Z
Q200
Q201
Q206
Q203
Q204
Q202
X
Y
Q223
Q217
Q216
Q207
Q222
Example NC block:
N43 G215 Q200=2 Q201=-20 Q206=150
Q202=5 Q207=500 Q203=+0 Q204=50
Q216=+50 Q217=+50 Q222=81 Q223=80*
Kkap8.pm6 29.06.2006, 08:06 179