HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 242)

242 8 Programming: Cycles
8.3 Cy
cles f
o
r Milling P
o
c
k
ets, St
uds and Slots
8 Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
8 Depth Q201 (incremental value): Distance between
workpiece surface and bottom of slot.
8 Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling.
8 Plunging depth Q202 (incremental value): Total
extent by which the tool is fed in the tool axis during
a reciprocating movement.
8 Machining operation (0/1/2) Q215: Define the
machining operation:
0: Roughing and finishing
1: Only roughing
2: Only finishing
8 Workpiece surface coordinate Q203 (absolute
value): Coordinate of the workpiece surface.
8 2nd set-up clearance Q204 (incremental value):
Z coordinate at which no collision between tool and
workpiece (clamping devices) can occur.
8 Center in 1st axis Q216 (absolute value): Center of
the slot in the reference axis of the working plane.
8 Center in 2nd axis Q217 (absolute value): Center of
the slot in the minor axis of the working plane.
8 Pitch circle diameter Q244: Enter the diameter of
the pitch circle.
8 Second side length Q219: Enter the slot width. If you
enter a slot width that equals the tool diameter, the
TNC will carry out the roughing process only (slot
milling).
8 Starting angle Q245 (absolute value): Enter the polar
angle of the starting point.
Use the machine parameter suppressDepthErr to define
whether, if a positive depth is entered, the TNC should
output an error message (on) or not (off).
Danger of collision!
Keep in mind that the TNC reverses the calculation for pre-
positioning when a positive depth is entered. This
means that the tool moves at rapid traverse in the tool axis
at safety clearance below the workpiece surface!
X
Z
Q200
Q207
Q202
Q203
Q204
Q201
X
Y
Q217
Q216
Q248
Q245
Q219
Q244