6. SAFETY FUNCTIONS
The position of the
tool after reference
Fig. 6.3 (d) Setting the forbidden area
Area can be set in piles.
Fig. 6.3 (e) Setting the forbidden area over lapping
Unnecessary limits should be set beyond the machine stroke.
If the maximum rapid traverse rate is F (mm/min), the maximum overrun
amount, L (mm), of the stored stroke limit is obtained from the following
L (mm) = F/7500
The tool enters the specified inhibited area by up to L (mm). Bit 7 (BFA)
of parameter No. 1300 can be used to stop the tool when it reaches a point
L mm short of the specified area. In this case, the tool will not enter the
Each limit becomes effective after the power is turned on and manual
reference position return or automatic reference position return by G28
has been performed.
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).
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.
D Forbidden area
D Overrun amount of
stored stroke limit
D Effective time for a
D Releasing the alarms