Tool Carriers With Orientation Capability; General Information - Siemens SINUMERIK 840D sl Function Manual

● The response after reprogramming G41 or G42 when tool radius compensation is already
active is similar to compensation suppression.
The following deviations apply:
– Only linear blocks are permissible
– A single traversing block that contains G41 or G42 is modified so that it ends at the offset
– The contour is always reapproached with NORM, independent of the G command of the
● If G41 / G42 is programmed several times in consecutive traversing blocks, all blocks are
machined as for CUTCONON, except for the last one.
● The type of contour suppression is evaluated only in the first traversing block of a sequence
of blocks.
If both CUTCONON and G41 or G42 are programmed in the first block, the response to
deactivating contour suppression is determined by CUTCONON.
Changing from G41 to G42 or vice versa makes sense in this case as a means of changing
the compensation side (left or right of the contour) when restarting.
A change of the compensation side (G41/G42) can also be programmed in a later block,
even if contour suppression is active.
● Collision monitoring and bottleneck detection is deactivated for all blocks with active contour
suppression.
2.8

Tool carriers with orientation capability

2.8.1

General information

Introduction
The orientation of the tool can vary (e.g. due to retooling) for one single class of machine tools.
When the machine is operating, the orientation that has been set is permanent, however, and
cannot be changed during traversing. For this reason, kinematic orientation transformation (3-,
4- or 5axis transformations, TRAORI) is neither necessary nor does it make sense for such
machines. However, it is necessary to take account of the changes in the tool length
components caused by changing the orientation, without having to trouble the user with
mathematics involved. The control performs these calculations.
Required data
The following requirements must be met if the control is to take tool offsets into account for tool
carriers with orientation capability:
● Tool data (geometry, wear, etc.)
● Toolholder data (data for the geometry of the toolholder with orientation capability)
Tools
Function Manual, 06/2019, A5E47435126B AA
point of the start point in the following block. Thus it is not necessary to insert an
intermediate block. The same applies to the last block in a sequence of traversing blocks
where each contains G41 or G42.
17th group (approach and retraction behavior with tool offset; NORM / KONT).
2.8 Tool carriers with orientation capability
W1: Tool offset
95