HEIDENHAIN TNC 426 B User Manual page 195

Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
Depth Q201 (incremental value): Distance between
workpiece surface and bottom of slot
Feed rate for milling Q207: Traversing speed of the
tool in mm/min while milling.
Plunging depth Q202 (incremental value): Total extent
by which the tool is fed in the tool axis during a
reciprocating movement.
Machining operation (0/1/2) Q215:
Define the extent of machining:
0: Roughing and finishing
1: Roughing only
2: Finishing only
Workpiece SURFACE COORDINATE Q203 (absolute
value): Coordinate of the workpiece surface
2nd set-up clearance Q204 (incremental value): Z
coordinate at which no collision between tool and
workpiece (clamping devices) can occur.
Center in 1st axis Q216 (absolute value): Center of the
slot in the main axis of the working plane
Center in 2nd axis Q217 (absolute value): Center of the
slot in the secondary axis of the working plane
First side length Q218 (value parallel to the main axis
of the working plane): Enter the length of the slot
Second side length Q219 (value parallel to the
secondary axis of the working plane): 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).
Angle of rotation Q224 (absolute value): Angle by
which the entire slot is rotated. The center of rotation
lies in the center of the slot.
180
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Z
Q200
Q203
Q202
Y
Q217
Q216
Example NC blocks:
51 Y L DEF 210 SLOT RE IP. PLNG
Q200=2 ;SET-UP
Q201=-20 ;DEPTH
Q207=500 ;FEED RATE FOR MILLING
Q202=5 ;PLUNGING DEPTH
Q215=0 ;MA HINING OPERATION
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=12 ;2ND SIDE LENGTH
Q224=+15 ;ANGLE OF ROTATION
Q207
Q204
Q201
X
Q224
X
LEARAN E
OORDINATE
LEARAN E
8 Programming: Cycles