Siemens SINUMERIK 840D

4
08.97 Protection Zones
4.1 Definin
g
the
p
rotection zones CPROTDEF
,
NPROTDEF
4
840D
NCU 571
840D
NCU 572
NCU 573
FM-NC 810D 840Di

Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
4-143
If a full circle describes the protection zone, it must
be divided into two half circles. The order G2, G3 or
G3, G2 is not permitted. A short G1 block must be
inserted, if necessary.
The last point in the contour description must
coincide with the first.
External protection zones
(only possible for
workpiece-oriented protection zones) should be
defined in the
clockwise direction
.
For
dynamically balanced
protection zones
(e.g. spindle chucks) you must describe the
complete contour
(and not only up to the center of
rotation!).
Tool-oriented
protection zones must always be
convex.
If a concave protected zone is desired, this
should be subdivided into several convex protection
zones.
The following must not be active while the protection
zones are defined:
•
Cutter radius or tool nose radius compensation,
•
Transformation,
•
Frame.
Nor must reference point approach (G74), fixed
point approach (G75), block search stop or program
end be programmed.
F
Convex protection zones
Concave protection zones (not permitted)