HEIDENHAIN TNC 426 B User Manual page 216

Milling depth Q1 (incremental value): Distance
between workpiece surface and contour floor
Finishing allowance for side Q3 (incremental value):
Finishing allowance in the working plane
Workpiece surface coordinate Q5 (absolute value):
Absolute coordinate of the workpiece surface
referenced to the workpiece datum
Clearance height Q7 (absolute value): Absolute height
at which the tool cannot collide with the workpiece.
Position for tool retraction at the end of the cycle.
Plunging depth Q10 (incremental value):
Dimension by which the tool plunges in each infeed
Feed rate for plunging Q11: Traversing speed of the
tool in the tool axis
Feed rate for milling Q12: Traversing speed of the tool
in the working plane
Climb or up-cut ? Up-cut = -1 Q15:
Climb milling:
Conventional up-cut milling
To enable climb milling and up-cut milling alternately
in several infeeds
Example NC blocks:
62 Y L DEF 25.0 ONTOUR TRAIN
Q1=-20 ;MILLING DEPTH
Q3=+0 ;ALLOWAN E FOR SIDE
Q5=+0 ;SURFA E
Q7=+50 ; LEARAN E HEIGHT
Q10=+5 ;PLUNGING DEPTH
Q11=100 ;FEED RATE FOR PLUNGING
Q12=350 ;FEED RATE FOR MILLING
Q15=+1 ; LIMB OR UP- UT
HEIDENHAIN TNC 426 B, TNC 430
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Input value = +1
Input value = –1
Input value = 0
OORDINATE
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