Siemens SINUMERIK 802D

Programming
10.2 Positional data
Cylindrical grinding
Programming and Operating Manual, 07/2009, 6FC5398-4CP10-2BA0
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● 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.
● Diameter programming, DIAMON on
● Diameter programming, DIAMOF off
Diameter programming, DIAM90 for traversing blocks with G90. Radius programming for
traversing blocks with G91.
10.2.2 Absolute / incremental dimensioning: G90, G91, AC, IC
Functionality
With the instructions G90/G91, the written positional data X, Z, ... are evaluated as a
coordinate point (G90) or as an axis position to traverse to (G91). G90/91 applies for all
axes.
Irrespective of G90/G91, certain positional data can be specified for certain blocks in
absolute/incremental dimensions using AC/IC.
These instructions do not determine the path by which the end points are reached; this is
provided by a G group (G0, G1, G2 and G3... see Chapter "Axis Movements").
Programming
G90 ; Absolute dimension data
G91 ; Incremental dimension data
Z=AC(...) ; Absolute dimensioning for a certain axis (here: Z axis), non-modal
Z=IC(...) ; Absolute dimensioning for a certain axis (here: Z axis), non-modal
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Figure 10-3 Different dimensioning types in the drawing