Brief Description - Siemens sinumerik 840D sl Function Manual

Brief description

Function
The "Continue machining - Retrace support" technological function ("RESU" in the remainder
of this document) 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.
The machine operator initiates the retrace at the program continuation point. 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 1-1
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: Retrace Support (TE7)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
Programmed contour with program continuation and interruption points
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