Siemens sinumerik 840d Programming Manual page 336

Path Traversing Behavior
9
9.7 Repositioning on contour, REPOSA, REPOSL, REPOSQ, REPOSH
840D 840D
NCU 571 NCU 572
NCU 573
Approach along semi-circle, REPOSH, REPOSHA
The tool approaches the repositioning point along a
semi-circle with a diameter of DISR=.... The control
system automatically calculates the intermediate
point between the start and repositioning points.
Example:
REPOSH RMI DISR=20 F400
The following applies to circular motions
REPOSH and REPOSQ:
The circle is traversed in the specified working
planes G17 to G19.
If you specify the third geometry axis (infeed
direction) in the approach block, the repositioning
point is approached along a helix in case the tool
position and programmed position in the infeed
direction do not coincide.
In the following cases, the control automatically
switches over to linear approach REPOSL:
• You have not specified a value for DISR.
• No defined approach direction is available
(program interruption in a block without travel
information).
• With an approach direction that is perpendicular
to the current working plane.
9-336
FM-NC 810D 840Di
Y
Repositioning
point
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
08.97
9
Intermediate
point
Start point
X
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