Siemens SINUMERIK 840D Programming Manual page 114

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Drilling Cycles and Drilling Patterns 03.96
2.3 Drill pattern cycles
Sequence of operations
In the cycle, the drilling positions are approached
one after the other on the plane with G0.
Description of parameters
CPA, CPO and RAD (center point and radius
Y
CPA
abscissa, ordinate)
The position of the circle of holes in the machining
INDA
plane is defined by the center point (parameters
CPA and CPO) and the radius (parameter RAD).
STA1
Only positive values are permissible for the radius.
STA1 and INDA (start angle and indexing angle)
The arrangement of the holes in the circle is defined
by these parameters.
X
Parameter STA1 defines the angle of rotation
between the positive direction of the abscissa in the
coordinate system active before the cycle was called
and the first hole. Parameter INDA contains the
angle of rotation from one hole to the next.
If parameter INDA is assigned the value zero, the
indexing angle is calculated internally from the
number of holes which are positioned equally in a
circle.
NUM (number)
You determine the number of holes with the parameter
NUM.
© Siemens AG, 2002. All rights reserved
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SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition