Siemens SINUMERIK 840D Programming Manual page 183

3
12.97
The cycle creates the following motion sequence
when finishing (VARI=XX2):
During finishing, milling is performed at the relevant
infeed along the base of the contour until the final
dimension is reached.
Approaching and retraction to/from the contour is
performed in a flexible way according to the
corresponding preset parameters. The corresponding
path is calculated within the control unit.
At the end of the cycle, the tool is positioned at the
contour retraction point at the retraction plane level.
Contour programming
For programming the contour, please note the
following:
• In the subroutine no programmable frame
(TRANS, ROT, SCALE, MIRROR) may be
selected before the first programmed position.
• The first block of the contour subroutine is a
straight line block containing G90, G0 and
defines the contour start.
• The cutter radius compensation is selected and
deselected from the upper level cycle; then the
contour subroutine has no G40, G41, G42
programmed.
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3.12 Path milling – CYCLE72
3
Milling Cycles
3-183