Dimensions In Metric Units And Inches: G71, G70, G710, G700 - Siemens SINUMERIK 808D ADVANCED Programming And Operating Manual

See the following illustration for different dimensioning types in the drawing:
Absolute dimensioning G90
With absolute dimensioning, the dimensioning data refers to the zero of the coordinate system currently active (workpiece
or current workpiece coordinate system or machine coordinate system). This is dependent on which offsets are currently
active: programmable, settable, or no offsets.
Upon program start, G90 is active for all axes and remains active until it is deselected in a subsequent block by G91
(incremental dimensioning data) (modally active).
Incremental dimensioning G91
With incremental dimensioning, the numerical value of the path information corresponds to the axis path to be traversed.
The leading sign indicates the traversing direction.
G91 applies to all axes and can be deselected in a subsequent block via G90 (absolute dimensioning).
Specification with =AC(...), =IC(...)
After the end point coordinate, write an equality sign. The value must be specified in round brackets.
Absolute dimensions are also possible for circle center points using =AC(...). Otherwise, the reference point for the circle
center is the circle starting point.
Programming example
N10 G90 X20 Z90
N20 X75 Z=IC(-32)
N180 G91 X40 Z20
N190 X-12 Z=AC(17)
8.2.4

Dimensions in metric units and inches: G71, G70, G710, G700

Functionality
If workpiece dimensions that deviate from the base system settings of the control system are present (inch or mm), the
dimensions can be entered directly in the program. The required conversion into the base system is performed by the control
system.
Programming
G70 ; Inch dimensions
G71 ' Metric dimensions
G700 ; Inch dimensions, also for feedrate F
G710 ; Metric dimensions, also for feedrate F
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA1, 01/2014
; Absolute dimensions
; X-dimensions remain absolute, incremental Z dimension
; Switch-over to incremental dimensioning
; X-remains incremental dimensioning, Z-absolute
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