Siemens SINUMERIK 840D Programming Manual page 328

4
Turning Cycles
4.10 Extended stock removal cycle – CYCLE950 (SW 5.3 and higher)
New functions compared to CYCLE95:
• You can define a blank either by programming a
contour, specifying an allowance on the finished-
part contour or entering a blank cylinder (or
hollow cylinder in the case of internal machining)
from which stock must be removed.
• It is possible to detect residual material that
cannot be machined with the current tool. The
cycle can generate an updated blank, which is
stored as a program in the parts program
memory.
• You can specify the contours for stock removal:
- in a separate program,
- in the calling main program or
- as section of any given program.
• During roughing, it is possible to choose between
paraxial and contour-parallel machining.
• During roughing, you have the option of
machining along the contour so that no corners
are left over, or removing stock immediately at
the roughing intersection.
• The angle for stock removal at the contour during
roughing is programmable.
• Optionally, relief cuts can be machined or
skipped during roughing.
Sequence of operations
Position reached prior to cycle start:
The initial position can be any position from which the
blank contour can be approached collision-free. The
cycle calculates collision-free approach movements to
the starting point for machining but does not consider
the tool holder data.
Movement for paraxial roughing:
• The starting point for roughing is calculated
internally in the cycle and approached with G0.
4-328
without blank definition
X
finished part contour
blank definition as contour
X
finished part contour
blank definition via offset value
X
finished part contour
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
4
03.96
04.00
Z
blank definition as contour
Z
Z
© Siemens AG, 2002. All rights reserved