Siemens SINUMERIK 808D Function Manual

Function Manual
01/2017
95
Display
The checkback signal that dry run feedrate is active is displayed in the relevant "DRY" status line on the user interface.
10.4.5
Block search: Processing of certain program sections
Functionality
To set the program run to a certain block (target block) of a part program, the block search function can be used. It can be
selected whether or not the same calculations are to be performed during the block search up to the target block as would
be performed during normal program operation.
After the target block is reached, the part program can be started via IS "NC Start" (give 2x) (DB3200.DBX0007.1). If
necessary there is an automatic compensating movement of the axes to start or end positions of the target block. Execution
of the remaining program then continues.
Note
Pay attention to a collision
-free start position and appropriate active tools and other technological values! If necessary, a
collision
free start position must be approached manually with JOG. Select the target block considering the selected block
search type.
Selection/activation
The block search is selected in "AUTO" mode on the user interface.
The search run can be activated with corresponding softkey for the following functions:
● Block search with calculation to contour
Is used in any circumstances in order to approach the contour. On NC Start, the
start position of the target block
or the
end position of the block before the target block is approached. This is traversed up to the end position. Processing is
true to contour.
● Block search with calculation to block end point
Is used in any circumstances in order to approach a target position (e.g. tool change position). The
end position of the
target block
or the next programmed position is approached using the type of interpolation valid in the target block. This
is not true to contour. Only the axes programmed in the target block are moved.
● Block search without calculation.
Is used for a quick search in the main program. No calculations are performed. The internal controller values indicate the
status valid before the search. Whether the program can be executed subsequently depends on the program and must
be decided by the operator. This search run is suitable for a fast syntax check of a new program.
Interface signal
In the PLC, the following interface signals are set according to a time sequence (see figure):
● "Block search active" (DB3300.DBX0001.4)
● "Action block active" (DB3300.DBX0001.3)
● "Approach block active" (DB3300.DBX0000.4)
Note
The "Approach block active" is only enabled with "Block search with calculation on contour" because a separate
approach block is not generated w
ith "Block search with calculation at block end point" (the approach block is the same
as the target block).

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English