9. SAFETY ZONE AREA EXTENSION
(1)Extending safety zone check areas
The following can be specified for up to eight safety zones. For details
of the following, see Chapter 8, ”SAFETY ZONE CHECK.”
(a) Safety zone type A
If punching is specified in the punch forbidden area of a safety
zone, the previous check function gives an alarm. If a move
command brings the tool into the approach forbidden area of the
safety zone, the axial movement stops, and an alarm is given.
(b)Safety zone type B
All the safety zones are handled as punch forbidden areas. If the
tool enters the safety zone, the punch–forbidden area–entered
signal WDDO is output after positioning.
In a punch/laser combination machine, all safety zones are handled
as punch forbidden areas in the punch mode. In the laser mode,
however, all safety zones are handled as approach forbidden areas.
If a move command moves the laser torch into a safety zone and if
the Z–axis height is within the approach forbidden area, the axial
movement stops, and an alarm is given. While the laser torch is in
a safety zone, when the Z–axis positioning command is going to
cause the Z–axis to enter the height limited area, the previous check
function gives an alarm.
(c) Automatic safety–zone setting
Position detection by the G32 command or an external signal is
(d)Safety zone setting screen
The safety zone setting screen shows safety zones #1 to #8. Up to
eight zones can be input.
(e) Workpiece holder interference avoidance function type A
If the tool area interferes with the workpiece holder area, the tool
escape signal WHAL is output, and positioning is carried out at the
same time. The PMC carries out the escape sequence with the
interlock signal, tool escape signal WHAL, and tool escape
completion signal WHALC.
(f) Workpiece holder interference avoidance function type B
If the tool area interferes with the workpiece holder area, the CNC
automatically performs the avoidance operation.
(g)Program check (machine lock operation)
The safety zone check function is enabled during a program check.
The safety zone check function is enabled during graphic
simulation. However, safety zones #5 to #8 cannot be displayed.
(i) Window function
To read and write extended safety zones and tool areas with a
software application program, use the parameter read/write
function provided in the application.
(2)Extending safety zone tool areas
Up to 16 tool areas can be selected.