Siemens SINUMERIK 840D sl Programming Manual page 780

Work preparation
3.13 Tool offsets
Note
Explanations of parameters
"m" specifies the number of the toolholder to be programmed.
$TC_CARR47 to $TC_CARR54 and $TC_CARR61 to $TC_CARR63 are not defined and
produce an alarm if read or write access is attempted.
The start/end points of the distance vectors on the axes can be freely selected. The rotation
angles α
way, the kinematics of a toolholder can be programmed for any number of possibilities.
Toolholders with only one or no rotary axis at all can be described by setting the direction
vectors of one or both rotary axes to zero.
With a toolholder without rotary axis the distance vectors act as additional tool offsets whose
components cannot be affected by a change of machining plane (G17 to G19).
Parameter extensions
Parameters of the rotary axes
The system variables have been extended by the entries $TC_CARR24[m] to
$TC_CARR33[m] and described as follows:
Offset of rotary axes
v , v
1
The angle offset/
angle increment of
the rotary axes v
The minimum and
maximum position of
the rotary axes v
Parameters for the user
$TC_CARR34 to $TC_CARR40 contain parameters that are freely available to users and up to
SW 6.4 were as standard, not further evaluated within the NCK or had no significance.
Fine offset parameters
$TC_CARR41 to $TC_CARR65 include fine offset parameters that can be added to the values
in the basis parameters. The fine offset value assigned to a basic parameter is obtained when
the value 40 is added to the parameter number.
780
, α around the two axes are defined in the initial state of the toolholder by 0°. In this
1 2
Changing the position of the rotary axis v
ented toolholder.
2
The offset or the angle increment of the Hirth tooth system of the rotary axes v
and v . Programmed or calculated angle is rounded up to the next value that
2
, v results from phi = s + n * d when n is an integer.
1 2
The minimum and maximum position of the rotary axis limit angle (software limit)
of the rotary axes v1 and v2.
, v
1 2
or v for the initial setting of the ori‐
1 2
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
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NC programming