Te7: Continue Machining - Retrace Support; Brief Description - Siemens SINUMERIK 840D sl Function Manual

TE7: Continue machining - retrace support

15.1

Brief description

Function
The "Continue machining - Retrace support (RESU)" technological function supports the
retracing of uncompleted 2-dimensional machining processes such as laser cutting, water jet
cutting, etc.
In the event of a fault during the machining process, e.g. loss of the laser, RESU can be used
even by machine operators who do not have specific knowledge of the active part program to
interrupt machining and travel back along the contour from the interruption point to a program
continuation point necessary for machining purposes.
After reaching the "continue machining" point, the machine operator triggers the re-
machining. As part of the retrace process, an implicit block search takes place along the
contour with calculation followed by repositioning on the contour and automatic retracing of
the part program machining process.
The retrace option is selected and deselected in advance using part program commands
within the machining program. The program continuation point can be selected at any position
within the contour ranges specified in this way.
Figure 15-1
Precise retracing of contours is possible on all programmed contours comprising straight and
circular elements. During retracing, other programmed contour elements such as splines or
automatically inserted non-linear contour elements (circle, parable, etc. e.g. through tool
radius compensation) are mapped as straight lines through the start and end points of the
corresponding contour element, thereby preventing precise retracing of contours.
Special Functions
Function Manual 09/2011, 6FC5397-2BP40-2BA0
Programmed contour with program continuation and interruption points
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