Siemens SINUMERIK 840D sl, Function Manual

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Detailed Description
2.4 Tool radius compensation 2D (TRC)
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
71
Response with REPOS
If an SAR cycle is interrupted and repositioned, it resumes at the point of interruption on
RMI
.
With
RME
, the contact point is the end point of the last SAR block; with
RMB
, it is the start
point of the first SAR block.
If
RMI
is programmed together with
DISPR
(reapproach at distance
DISPR
in front of
interruption point), the reapproach point can appear in a subblock of the SAR cycle before
the interruption subblock.
2.4.4.6 Examples
Example 1
The following conditions must be true:
•
Smooth approach is activated in block
N20
•
X=40 (end point); Y=0; Z=0
•
Approach movement performed with quadrant (
G247
)
•
Approach direction not programmed,
G140
is valid, i.e., because TRC is active (
G42
) and
compensation value is positive (10), the contour is approached from the right
•
Approach circle generated internally (SAR contour) has radius 20, so that the radius of
the tool center path is equal to the programmed value
DISR=10
•
Because of
G341
, the approach movement takes place with a circle in the plane, resulting
in a start point at (20, -20, 0)
•
Because
DISCL=5
, point P2 is at position (20, -20, 5) and, because of Z30, point P1 is in
N10
at (20, -20, 30)
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;
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Figure 2-25 Contour example 1