HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 53)

HEIDENHAIN TNC 640 53
2.2 P
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n Definition P
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TERN DEF
Defining a pitch circle
U Bolt-hole circle center X (absolute): Coordinate of
the circle center in the X axis.
U Bolt-hole circle center Y (absolute): Coordinate of
the circle center in the Y axis.
U Bolt-hole circle diameter : Diameter of the bolt-hole
circle.
U Starting angle : Polar angle of the first machining
position. Reference axis: Major axis of the active
machining plane (e.g. X for tool axis Z). You can enter
a positive or negative value
U Stepping angle/end angle : Incremental polar angle
between two machining positions. You can enter a
positive or negative value As an alternative you can
enter the end angle (switch via soft key).
U Number of repetitions : Total number of machining
positions on the circle
U Workpiece surface coordinate (absolute): Enter Z
coordinate at which machining is to begin
If you have defined a workpiece surface in Z not equal to
0, then this value is effective in addition to the workpiece
surface Q203 that you defined in the machining cycle.
Example: NC blocks
10 L Z+100 R0 FMAX
11 PATTERN DEF
PITCHCIRC1 (X+25 Y+33 D80 START+45 STEP30
NUM8 Z+0)