Siemens Sinumerik 840D sl Programming Manual page 234

Protection zones
3.2 Activating/deactivating protection zones (CPROT, NPROT)
Example
Possible collision of a milling cutter with the measuring probe is to be monitored on a milling
machine. The position of the measuring probe is to be defined by an offset when the function
is activated. The following protection zones are defined for this:
• A machine-specific and a workpiece-related protection zone for both the measuring probe
holder (n-SB1) and the measuring probe itself (n-SB2).
• A channel-specific and a tool-oriented protection zone for the milling cutter holder (c-SB1),
the cutter shank (c-SB2) and the milling cutter itself (c-SB3).
The orientation of all protection zones is in the Z direction.
The position of the reference point of the measuring probe on activation of the function must
be X = -120, Y = 60 and Z = 80.
Program code
DEF INT PROTECTB
Definition of protection zone G17
NPROTDEF(1,FALSE,3,10,–10)G01 X0 Y–10
X40
Y10
X0
Y–10
EXECUTE(PROTECTB)
NPROTDEF(2,FALSE,3,5,–5)
G01 X40 Y–5
X70
Y5
X40
Y–5
EXECUTE(PROTECTB)
234
Comment
; Definition of a Help variable
; Set orientation
; Protection zone n–SB1
; Protection zone n–SB2
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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