
2.PREAPARATIONS FOR OPERATION B-63323EN-1/03
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tool, setting the forbidden area for the longest tool requires no re-
setting and results in safe operation.
Fig. 2.3.3 (d) Setting the forbidden area
- Forbidden area over lapping
Area can be set in piles.
Fig. 2.3.3 (e) Setting the forbidden area over lapping
Unnecessary limits should be set beyond the machine stroke.
- Stop position with stored stroke limit
With stored stroke check 1, the tool stops a maximum of L mm before a
set forbidden area. (Lmm = F/7500, where F denotes the rapid traverse
rate (mm/min).) Therefore, the tool does not enter the forbidden area.
With stored stroke check 2, the tool overruns a maximum of L mm.
The tool enters a set forbidden area by a maximum of L mm.
- Effective time for a forbidden area
Each limit becomes valid when reference position return has been
performed manually or by G28 after power-up. If an absolute-position
detector is used, and a reference position has already been established
when the power is turned on, however, a stored stroke check is
performed immediately after the power is turned on.
After the power is turned on, if the reference position is in the
forbidden
area of each limit, an alarm is generated immediately. (Only in G22
mode for stored stroke limit 2).
B
a
b
The position of the
tool after reference
position return
Area boundary
A
Forbidden area of
stroke limit check 1
Forbidden area of
stroke limit check 2