Programming Cycles; Call And Return Conditions - Siemens SINUMERIK 840D Programming Manual

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1.3

Programming cycles

A standard cycle is defined as a subroutine with a
name and a parameter list. The conditions described
in "SINUMERIK Programming Guide Part 1:
Fundamentals" apply when calling a cycle.
The cycles are supplied on diskette or, for the MMC
102, with the corresponding software release. They
are loaded into the parts program memory of the
control via the RS-232 interface (see Operator's
Guide).

1.3.1 Call and return conditions

The G functions active before the cycle is called and
the programmable frame remain active beyond the
cycle.
Define the machining plane (G17, G18, G19) before
calling the cycle. A cycle operates in the current
plane with
• Abscissa (1st geometry axis)
• Ordinate (2nd geometry axis)
• Applicate (3rd geometry axis of the plane in
space).
In drilling cycles, the hole is machined in the axis
that corresponds to the applicate of the current
plane. The depth infeed is performed in this axis with
milling applications.
Plane and axis assignments
Command Plane
X/Y
G17
Z/X
G18
Y/Z
G19
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition

1.3 Programming cycles

Z
Perpendicular infeed axis
Z
Y
X
1
General
Y
X
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