HEIDENHAIN TNC 426 B User Manual page 186

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 im 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; enter a value greater than 0.
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 tool 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 main axis of the working plane
Center in 2nd axis Q217 (absolute value): Center of the
pocket in the secondary axis of the working plane
First side length Q218 (incremental value): Pocket
length, parallel to the main axis of the working plane
Second side length Q219 (incremental value): Pocket
length, parallel to the secondary axis of the working
plane
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.
Allowance in 1st axis Q221 (incremental value):
Allowance in the main axis of the working plane
referenced to the length of the pocket.
HEIDENHAIN TNC 426 B, TNC 430
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Q206
Z
Q200
Q203
Q202
Y
Q218
Q217
Q216
Example NC blocks:
34 Y L DEF 212 PO KET FINISHING
Q200=2 ;SET-UP
Q201=-20 ;DEPTH
Q206=150 ;FEED RATE FOR PLUNGING
Q202=5 ;PLUNGING DEPTH
Q207=500 ;FEED RATE FOR MILLING
Q203=+0 ;SURFA E
Q204=50 ;2. SET-UP
Q216=+50 ; ENTER IN 1ST AXIS
Q217=+50 ; ENTER IN 2ND AXIS
Q218=80 ;1ST SIDE LENGTH
Q219=60 ;2ND SIDE LENGTH
Q220=5 ; ORNER RADIUS
Q221=0 ;ALLOWAN E
Q204
Q201
X
Q207
X
Q221
LEARAN E
OORDINATE
LEARAN E
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