Preconditions - Siemens SINUMERIK 840D Programming Manual

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3.2

Preconditions

Programs required in the control
The milling cycles call the programs
• MESSAGE.SPF and
• PITCH.SPF
internally as subroutines. Moreover, you need the
data block GUD7.DEF and the macro definition file
SMAC.DEF.
Load them in the parts program memory of the
control unit before executing the milling cycles.
Call and return conditions
Milling cycles are programmed independently of the
actual axis names. You must activate a tool offset
before you call the milling cycles.
The required values for the feedrate, spindle speed and
spindle direction of rotation must be programmed in the
parts program if no parameters are available for these
in the milling cycle.
The center point coordinates of the milling pattern or the
pocket to be machined are programmed in the right-
handed coordinate system.
The G functions and current programmable frame
active before the cycle was called remain active beyond
the cycle.
Plane definition
In milling cycles, it is generally assumed that the
current workpiece coordinate system is defined by
selecting plane G17, G18 or G19 and activating a
programmable frame (if necessary). The infeed axis
is always the 3rd axis of the coordinate system
(see also Programming Guide).
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
Milling Cycles

3.2 Preconditions

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