HEIDENHAIN iTNC 530 (340 420) - Manual (Page 464)

436 11 Test Run and Program Run
1
1
.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.
The RESTORE POS AT N feature must be enabled and
adapted by the machine tool builder. Refer to your
machine 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.
If you are working with nested programs, you can use
MP7680 to define whether the block scan is to begin at
block 0 of the main program or at block 0 of the last
interrupted program.
If the working plane is tilted, you can use the 3-D ON/OFF
soft key to define whether the TNC is to return to the
contour in a tilted or in a non-tilted coordinate system.
The function M128 is not permitted during a mid-program
startup.
If you want to use the block scan feature in a pallet table,
select the program in which a mid-program startup is to be
performed from the pallet table by using the arrow keys.
Then press the RESTORE POS AT N soft key.
All touch probe cycles and Cycle 247 are skipped in a mid-
program startup. Result parameters that are written to
from these cycles might therefore remain empty.