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
Turning
Operating Manual, 05/2017, A5E40868721
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:
This block search mode should only be used in exceptional cases if machin‐
ing was directly interrupted at the workpiece - and machining is to directly
continue at the workpiece again.
For a ShopTurn program, this block search mode can only be performed on
G code blocks.
If possible, the block search mode "with calculation - without approach"
should be used.
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.
Machining the workpiece
6.7 Starting machining at a specific point
135