Block Search Mode - Siemens SINUMERIK 840D sl Operating Manual

6.7.7

Block search mode

Set the desired search variant in the "Search Mode" window.
The set mode is retained when the control is shut down. When you activate the "Search"
function after restarting the control, the current search mode is displayed in the title row.
Search variants
Block search mode
With calculation
- without approach
With calculation
- with approach
With calculation
- skip extcall
Without calculation
With program test
Milling
Operating Manual, 05/2017, A5E40868956
Meaning
In order to be able to approach a target position in any circumstance (e.g.
tool change position).
The end position of the target block or the next programmed position is ap‐
proached using the type of interpolation valid in the target block. Only the
axes programmed in the target block are moved.
Note:
If machine data 11450.1=1 is set, the rotary axes of the active swivel data
record are pre-positioned after the block search.
It is used to be able to approach the contour in any circumstance.
The end position of the block prior to the target block is found with <CYCLE
START>. The program runs in the same way as in normal program process‐
ing.
Note:
In a ShopMill program, the search is only performed on G code-blocks.
This is used to speed-up a search with calculation when using EXTCALL
programs: EXTCALL programs are not taken into account.
Notice: Important information, e.g. modal functions, which are located in the
EXTCALL program, are not taken into account. In this case, after the search
target has been found, the program is not able to be executed. Such infor‐
mation should be programmed in the main program.
For a quick search in the main program.
Calculations will not be performed during the block search, i.e. the calculation
is skipped up to the target block.
All settings required for execution have to be programmed from the target
block (e.g. feedrate, spindle speed, etc.).
Multi-channel block search with calculation (SERUPRO).
All blocks are calculated during the block search. Absolutely no axis motion
is executed, however, all auxiliary functions are output.
The NC starts the selected program in the program test mode. If the NC
reaches the specified target block in the actual channel, it stops at the begin‐
ning of the target block and deselects program test mode again. After con‐
tinuing the program with NC start (after REPOS motion) the auxiliary func‐
tions of the target block are output.
For single-channel systems, the coordination is supported with events run‐
ning in parallel, e.g. synchronized actions.
Note
The search speed depends on MD settings.
Machining the workpiece
6.7 Starting machining at a specific point
171