Siemens SINUMERIK 840DE

Positional Data
3.2 Absolute/relative dimensions
Fundamentals
3-2 Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
• Absolute dimension, X=ACN(value) approaching the position in negative direction, only
this value is set for the rotary axis, the range of which is set in the machine datum to 0...<
360°.
• Incremental dimension, G91 modally effective applies for all axes in the block, until it is
revoked by G90 in a following block.
• Incremental dimension, X=IC(value) only this value applies exclusively for the stated axis
and is not influenced by G90/G91. This is possible for all axes and also for SPOS,
SPOSA spindle positionings, and interpolation parameters I, J, K.
• Inch dimension, G70 applies for all linear axes in the block, until revoked by G71 in a
following block.
• Metric dimension, G71 applies for all linear axes in the block, until revoked by G70 in a
following block.
• Inch dimension as for G70, but applies also for feedrate and length-related setting data.
• Metric dimension as for G71, but applies also for feedrate and length-related setting data.
• Diametral programming, DIAMON on
• Diametral programming, DIAMOF off
Diametral programming, DIAM90 for traversing blocks with G90. Radius programming for
traversing blocks with G91.
3.2 Absolute/relative dimensions
3.2.1 Absolute dimension (G90, X=AC)
Function
With the G90 command or the non-modal statement AC you determine the descriptive
system for approaching individual axes from setpoints in absolute dimensions.
You program where the tool should travel.
Programming
G90
Or
X=AC(...) Y=AC(...) Z=AC(...)