Siemens SINUMERIK 828D Programming Manual page 88

Tool offsets
5.8 Programmable tool offset (TOFFL, TOFF, TOFFR)
Further syntax rules
● The tool length can be changed simultaneously in all three components. However,
● If all three tool length components are not programmed in a block, the components not
Supplementary conditions
● Evaluation of setting data
● Tool change
Examples
Example 1: Positive tool length offset
The active tool is a drill with length L1 = 100 mm.
The active plane is
The effective drill length is to be increased by 1 mm. The following variants are available for
the programming of this tool length offset:
TOFFL=1
or
TOFFL[1]=1
or
TOFF[Z]=1
88
commands of the
TOFFL
may not be used simultaneously in one block.
and may also not be written simultaneously in one block.
TOFFL TOFFL[1]
programmed remain unchanged. In this way, it is possible to build up offsets for several
components block-by-block. However, this only applies as long as the tool components
have been modified either only with
type from to
TOFFL TOFF
offsets (see example 3).
The following setting data is evaluated when assigning the programmed offset values to
the tool length components:
SD42940 $SC_TOOL_LENGTH_CONST (change of tool length components on change
of planes).
SD42950 $SC_TOOL_LENGTH_TYPE (assignment of the tool length compensation
independent of tool type)
If this setting data has valid values not equal to 0, then these take preference over the
contents of G code group 6 (plane selection
<D no.>]) contained in the tool data, i.e. this setting data influences the evaluation of the
offsets in the same way as the tool length components L1 to L3.
All offset values are retained during a tool change (cutting edge change), e.g. they are
also effective for the new tool (new cutting edge).
, i.e. the drill points in the Z direction.
G17
/ group and commands of the
TOFFL[1..3]
or only with
TOFFL
or vice versa deletes any previously programmed tool length
G17
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
TOFF[<geometry axis>]
. Changing the programming
TOFF
- ) or the tool type ($TC_DP1[<T no.>,
G19
Fundamentals