OPERATION6. SAFETY FUNCTIONS
Two areas which the tool cannot enter can be specified with stored stroke
limit 1 and stored stroke check 2.
(2) Forbidden area on the inside(1) Forbidden area on the outside
: Forbidden area
Fig. 6.3 (a) Stroke check
When the tool exceeds a stored stroke check, an alarm is displayed and
the tool is decelerated and stopped.
When the tool enters a forbidden area and an alarm is generated, the tool
can be moved in the reverse direction from which the tool came.
Parameters (Nos. 1320, 1321 or Nos. 1326, 1327) set boundary. Outside
the area of the set limits is a forbidden area. The machine tool builder
usually sets this area as the maximum stroke.
Parameters (Nos. 1322, 1323) or commands set these boundaries. Inside
or outside the area of the limit can be set as the forbidden area. Parameter
OUT (No. 1300#0) selects either inside or outside as the forbidden area.
In case of program command a G22 command forbids the tool to enter the
forbidden area, and a G23 command permits the tool to enter the
forbidden area. Each of G22; and G23; should be commanded
independently of another commands in a block.
The command below creates or changes the forbidden area:
X–I> 2000 (In least command increment)
Y–J> 2000 (In least command increment)
G22 X_Y_I_J_ ;
Fig. 6.3 (b) Creating or changing the forbidden area using a program
D Stored stroke check 1
D Stored stroke check 2