Siemens SINUMERIK 840D sl Operation/Programming Manual page 97

08/2005
3
3.5 Starting the machining at a specific point in the program
Specifying a target
directly
♥ Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
3. Without calculation
During the block search, ShopTurn does not perform any
calculations, i.e. calculation is skipped until the target block. The
parameters within the control contain the values valid before the
block search.
This option is only available for programs that exclusively comprise
G code blocks.
4. External - without calculation
This method is performed in the same way as calculation to end
point, except that subroutines called via EXTCALL are skipped in
the calculation. In the same way, with G code programs that are
executed entirely by external drives (disk drive/network drive),
calculation is skipped until the target block is reached.
This helps to speed up the calculation process.
Notice
Modal functions included in the part of the program that is not
calculated are not taken into account for the part of the program to be
executed. In other words, with the "Without calculation" and "External
– without calculation" methods, you should choose a target block after
which all the information needed for machining is included.
In the "Search pointer" screen form, directly specify the target for the
target type "miscellaneous ShopTurn block or G-code block".
Each line of the screen form represents one program level. The actual
number of levels in the program depends on the nesting depth of the
program. Level 1 always corresponds to the main program and all
other levels correspond to subroutines.
You must enter the target in the line of the screen form corresponding
to the program level in which the target is located. For example, if the
target is located in the subroutine called directly from the main
program, you must enter the target in program level 2.
The specified target must always be unambiguous. This means for
example that if the subroutine is called in the main program in two
different places, you must also specify a target in program level 1
(main program).
The parameters in the "Search pointer" screen form have the following
meaning:
Number of program level
Program: Program name (the name of the main program is
automatically entered.)
Ext: File extension
P: Continuous counter (if part of a program is repeated
several times, you can specify the repetition number
at which you wish machining to be
resumed.)
Machining the Workpiece
3
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