Siemens SINUMERIK 840D sl Programming Manual page 817

Program code
N140 R4=_LEN[3]
N150 R5=_LEN[4]
N160 M30
Length components of the kinematic transformation and toolholder with orientation capability
If a toolholder with orientation capability is taken account of during the tool length calculation,
the following vectors are included in that calculation:
Type
M
T
P
In generic 5-axis transformation, the following machine data are included in the tool length
calculation for transformer types 24 and 56:
Transforma‐
tion type
24
56
Transformation type 56 (moving tool and moving workpiece) corresponds to type M for
toolholders with orientation capability.
For this 5-axis transformation, in the previous software releases, vector MD24560/24660
$MC_TRAFO5_JOINT_OFFSET_1/2 (vector of kinematic offset of the 1st/2nd 5-axis
transformation in the channel) corresponds to the sum of the two vectors l
tool carrier with orientation capability.
Only the sum is relevant for the transformation in both cases. The way, in which the two
individual components are composed, is insignificant. However, when calculating the tool
length, it is relevant which component is assigned to the tool and which is assigned to the tool
table. This is the reason that machine data MD24558/24658
$MC_TRAFO5_JOINT_OFFSET_PART_1/2 (vector kinematic offset in table) was introduced.
It corresponds to vector l3. Machine data:MD24560/24660
$MC_TRAFO5_JOINT_OFFSET_1/2 no longer corresponds to the sum of l1 and l3, but only to
vector l1. If machine data MD24558/24658 $MC_TRAFO5_JOINT_OFFSET_PART_1/2 is
equal to zero, the behavior is the same as before.
Compatibility
The GETTCOR function is used in conjunction with the TOOLENV and SETTCOR functions to
replace parts of the functionality, which were previously implemented externally in the
measuring cycles.
Only some of the parameters, which actually determine the effective tool length, were
implemented in the measuring cycles. The functions mentioned above can be configured to
reproduce the behavior of the measuring cycles in relation to the tool length calculation.
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Vectors
l1 and l2
l1, l2 and l3
The tool length is not influenced by the toolholder with orientation capability.
Machine data
MD24550/24650 $MC_TRAFO5_BASE_TOOL_1/2
MD24560/24660 $MC_TRAFO5_JOINT_OFFSET_1/2
MD24558/24658 $MC_TRAFO5_PART_OFFSET_1/2
MD24550/24650 $MC_TRAFO5_BASE_TOOL_1/2
MD24560/24660 $MC_TRAFO5_JOINT_OFFSET_1/2
Comment
; 7.5 (= 0.5 * 3.0 + 0.5 * 12.0)
; 19.0 (= 5.0 + 14.0)
Work preparation
3.13 Tool offsets
and l for a type M
1 3
817