Incremental Dimensions (G91, Ic) - Siemens Sinumerik 840D sl Programming Manual

Program code
N5 T1 D1 S2000 M3
N10 G0 G90 X11 Z1
N20 G1 Z-15 F0.2
N30 G3 X11 Z-27 I=AC(-5) K=AC(-21)
N40 G1 Z-40
N50 M30
Note
For information on the input of the circle center point coordinates I and J, see Section "Circular
interpolation".
See also
Absolute and incremental dimensions for turning and milling (G90/G91) (Page 149)
9.3.2

Incremental dimensions (G91, IC)

With incremental dimensions, the position specification refers to the last point approached, i.e.
the programming in incremental dimensions describes by how much the tool is to be traversed.
Modal incremental dimensions
Modal incremental dimensions are activated with the G91 command. Generally it applies to all
axes programmed in subsequent NC blocks.
Non-modal incremental dimensions
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Comment
; Loading of tool T1, spindle on with
clockwise direction of rotation.
; Absolute dimension input, in rapid tra-
verse to position XZ.
; Linear interpolation, feed of the tool.
; Counter-clockwise circular interpola-
tion, circle end point and circle center
point in absolute dimensions.
; Traverse
; End of block
Geometry settings
9.3 Dimensions
145