Retraceable Contour Area - Siemens sinumerik 840D sl Function Manual

Detailed description
2.1 Functional description
2.1.3

Retraceable contour area

In the event of multiple retrace support operations within a single contour range, reverse
travel along the contour is only ever possible up to the last program continuation point. On
the first reverse travel following RESU start, travel as far back as the start of the contour
range is possible. (See the figure "Maximum retraceable contour area".For the purpose of
simplicity, the interruption point (U) is identical in both cases.)
1. Reverse travel
2. Reverse travel
Figure 2-3
12
Before the first reverse travel, travel as far back as the start of the first contour element
(N20) is possible following RESU start (N15) (W1
as far back as program continuation point W1, W1 will define the maximum RESU range
for any further reverse travel following retrace support and forward travel.
The 2nd reverse travel can now only travel as far back as the last program continuation
point W2 W1. If for example reverse travel goes as far back as program continuation
max =
point W2, the maximum RESU range is restricted further.
Maximum retraceable contour area
). If for example reverse travel goes
max
Special functions: Retrace Support (TE7)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0