
B-64663EN/01 LASER FUNCTION 7.THREE-DIMENSIONAL MACHINING SYSTEM
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Timing chart
The timing chart for a proximity point search is shown below.
When the automatic operation started signal (STL) becomes "0", the
proximity point search signal (NRSRH) should be turned from "1" to
"0".
Proximity point search
signal
NRSRH
Proximity point search
in progress signal
LNSR
utomatic operation
start signal
ST
utomatic operation
started signal
STL
Cautions
1 The program on which to execute the proximity point search
function must be the one that was executed in memory operation
immediately before a proximity point search is executed.
Otherwise, the proximity point search cannot determine the
correct position. The reason for this is that the machine position
at the start of normal operation is stored as the reference position
when a proximity point search is executed. The buffer used to
store this machine position is not provided for each program;
only the position for the program that last performed automatic
operation (MEM, MDI, or DNC) is stored. Thus, a proximity
point search cannot be performed after MDI or DNC operation.
2 A proximity point search cannot be performed on the program
that was active immediately before the power is turned on, after
the power is turned on.
3 While a proximity point search is being executed, a re-search
cannot be performed. Once a proximity point search is executed
and a block is found (G226#0 (NRSCH) = 1, F225#1 (LNSR) =
1, F000#5 (STL) = 0), alarm PS4000 is raised if an attempt is
made to start a cycle again. To perform a re-search, perform a
reset first.
4 If a proximity point search does not find a block in which
distance Ls between the current nozzle position and the start
point of the block is smaller than the value specified in parameter
No. 15635, alarm PS4000 is raised.
5 If, during the execution of a proximity point search, the current
nozzle position is near the stored reference position for the
proximity point search, the nozzle moves to the stored reference
position for the proximity point search.
6 A dwell command is not executed during a proximity point
search.