HEIDENHAIN iTNC 530 (606 42x-02) ISO programming - Manual (Page 551)

HEIDENHAIN iTNC 530 551
16.4 Pr
ogr
am Run
Mid-program startup (block scan)
With the RESTORE POS AT N feature (block scan) you can start a part
program at any block you desire. The TNC scans the program blocks
up to that point. Machining can be graphically simulated.
If you have interrupted a part program with an INTERNAL STOP, the
TNC automatically offers the interrupted block N for mid-program
startup.
If the program was interrupted by one of the conditions listed below,
the TNC saves the point of interruption.
„ EMERGENCY STOP
„ Power interruption
„ Control software crash
After you have called the mid-program startup function, you can press
the soft key SELECT LAST N to reactivate the point of interruption and
approach it with an NC start. After switch-on the TNC shows the
message NC program cancelled.
The RESTORE POS AT N feature must be enabled and
adapted by the machine tool builder. Refer to your
machine tool manual.
Mid-program startup must not begin in a subprogram.
All necessary programs, tables and pallet files must be
selected in a program run mode of operation (status M).
If the program contains a programmed interruption before
the startup block, the block scan is interrupted. Press the
machine START button to continue the block scan.
After a block scan, return the tool to the calculated position
with RESTORE POSITION.
Tool length compensation does not take effect until after
the tool call and a following positioning block. This applies
if you have only changed the tool length.
The additional functions M142 (delete modal program
information) and M143 (delete basic rotation) are not
permitted during a mid-program startup.