Special Cases Of The Tool Radius Compensation - Siemens SINUMERIK 802D sl Programming And Operating Manual

10.6.7

Special cases of the tool radius compensation

Change of the compensation direction
The G41 ⇄ G42 compensation direction can be changed without writing G40 in between.
The last block that uses the old compensation direction will end at the normal end position of
the compensation vector in the end point. The new compensation direction is executed as a
compensation start (default setting at starting point).
Repetition of G41, G41 or G42, G42
The same compensation can again be programmed without writing G40 in between.
The last block before the new compensation call will end at the normal positon of the
compensation vector in the end point. The new compensation is carried out as a
compensation start (behavior as described for change in compensation direction).
Changing the offset number D
The offset number D can be changed in the compensation mode. A modified tool radius is
active with effect from the block in which the new D number is programmed. Its complete
modification is only achieved at the end of the block. In other words: The modification is
traversed continuously over the entire block, also for circular interpolation.
Cancellation of compensation by M2
If the offset mode is canceled with M2 (program end) without writing the command G40, the
last block with coordinates ends in the normal offset vector setting. No compensating
movement is executed. The program ends with this tool position.
Critical machining cases
When programming, pay special attention to cases where the contour path for inner corners
is smaller than the tool radius; and smaller than the diameter for two successive inner
corners.
Such cases should be avoided.
Also check over multiple blocks that the contour contains no "bottlenecks".
When carrying out a test/dry run, use the largest tool radius you are offered.
Surface grinding
Programming and Operating Manual, 11/2012, 6FC5398-5CP10-3BA0
Programming
10.6 Tool and tool offset
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