HEIDENHAIN TNC 426 (280 476) User Manual
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8 Programming: Cycles
8.5 Cy
cles f
o
r Mac
h
ining Hole P
a
tt
er
ns
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Stepping angle
Q247 (incremental value): Angle
between two machining operations on a pitch circle.
If you enter an angle step of 0, the TNC will calculate
the angle step from the starting and stopping angles
and the number of pattern repetitions. If you enter a
value other than 0, the TNC will not take the stopping
angle into account. The sign for the angle step
determines the working direction (– = clockwise).
7
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Number of repetitions
Q241: Number of machining
operations on a pitch circle
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Set-up clearance
Q200 (incremental value): Distance
between tool tip and workpiece surface. Enter a
positive value.
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Workpiece surface coordinate
Q203 (absolute
value): Coordinate of the workpiece surface
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2nd set-up clearance
Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
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Traversing to clearance height
Q301: Definition of
how the tool is to move between machining
processes:
0: Move between operations to the set-up clearance
1: Move between operations to 2nd set-up clearance.