Siemens SINUMERIK 840Di Function Manual page 1729

• Modal G code (G340, G341), which defines the subdivision of the movement into
Fig. 2-20
G340:
G341:
Note
Active, rotating frames are included in all cases where the position of the active plane G17 -
G19 (circle plane, helix axis, infeed movements perpendicular to the active plane) is relevant.
Tool Compensation (W1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
individual blocks from the start point to the end point
Sequence of the approach movement depending on G340/G341
The approach characteristic from P
If G247 or G347 is active (quadrant or semicircle) and start point P
plane defined by the end point P
defined or coincides with P
The circle plane or the helix axis is determined by the plane, which is active in the SAR
block (G17 - G19), i.e., the projection of the start tangent is used by the following block,
instead of the tangent itself, to define the circle.
The movement from point P
valid before the SAR block.
The approach characteristic from P
P and P are located within the machining plane, with the result that a circle is always
3 4
inserted instead of a helix with G247 or G347.
2.4 Tool: Tool radius compensation 2D (TRC)
to P is shown in the figure.
0 4
, a helix is inserted instead of a circle. Point P
4
.
3
to point P takes place along two straight lines at the velocity
0 3
to P is shown in the figure.
0 4
Detailed Description
is outside the machining
3
is not
2
2-49