
2.PREAPARATIONS FOR OPERATION B-63783EN-1/01
- 310 -
- Forbidden area over lapping
Area can be set in piles.
Forbidden area of
stroke limit check 1
Forbidden area of
stroke limit check 2
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).
- Releasing the alarms
If the enters a forbidden area and an alarm is generated, the tool can be
moved only in the backward direction. To cancel the alarm, move the
tool backward until it is outside the forbidden area and reset the system.
When the alarm is canceled, the tool can be moved both backward and
forward.
- Change from G23 to G22 in a forbidden area
When G23 is switched to G22 in the forbidden area, the following
results.
(1) When the forbidden area is inside, an alarm is informed in the next
move.
(2) When the forbidden area is outside, an alarm is informed
immediately.
If the tool cannot be moved out of the forbidden area, press the
emergency stop button then release it, set G23 to retract the tool,
correct the setting error, if any, then perform reference position
return again.