Siemens sinumerik 840d Programming Manual page 252

Transformations
7
7.5 Supplementary conditions when selecting a transformation
840 D
NCU 572
NCU 573
Frame change
Any instructions that only refer to the basic
coordinate system are allowed (FRAME, tool radius
compensation). A frame change with G91
(incremental dimension) is not dealt with separately
as is the case with inactive transformation. The
increment to be traversed is calculated in the
workpiece coordinate system of the new frame –
irrespective of the frame active in the previous
block.
Exceptions
Axes involved in transformation cannot be used
• as a preset axis (alarm)
• for approaching the fixed point (alarm)
• for referencing (alarm)
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810D 840Di
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
08.97
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