
8. SAFETY ZONE CHECK
B–63683EN/01
140
Automatic safety zone setting is enabled when reference position return
along the X–axis is completed immediately after CNC power–on. After
selecting manual reference position return mode, set automatic safety
zone setting request signal SAFRQ to 1. At this time, the workpiece
holder position detector must be ready for operation.
When reference position return has not yet been completed, perform
manual reference position return. For automatic safety zone setting, set
the SAFRQ signal to 1 after reference position return along the X–axis.
Next, enter feed axis direction select signal +X or –X. Then, the tool
moves along the X–axis to position A, set in parameter No. 16535, either
at the manual rapid traverse rate or at the feedrate set in parameter No.
16536.
Parameter set position A
#1 #2 #3 #4
F
#1 #2 #3 #4
⇐
ff
X–axis zero position
Fig. 8.5.2
Once movement along the X–axis has been completed, the CNC clears
the currently set safety zones, then sets safety zone setting ready signal
SAFEXE to 1. Automatic safety zone setting is enabled when the
SAFEXE signal is output.
If feed axis direction select signal +X or –X is entered again after the
SAFEXE signal has been set to 1, the tool performs high–speed reference
position return along the X–axis. During high–speed reference position
return, the CNC sets each safety zone at the rising or falling edge of the
workpiece holder position detector signal.
Safety zones are set in order from #1 to #2 to #3 to #4 if movement is made
for detection in the positive direction along the X axis. Safety zones are
set in order from #4 to #3 to #2 to #1 if movement is made for detection
in the negative direction along the X axis.
Upon the completion of high–speed reference position return, the
SAFEXE signal is set to 0 to end automatic safety zone setting. After the
SAFEXE signal has been confirmed as having been set to 0, the SAFRQ
signal is set to 0.
8.5.2
Detecting Workpiece
Holder Position Using
an External Signal
Detection method 1