Siemens SINUMERIK 840DE Programming Manual page 78

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Positional Data

3.2 Absolute/relative dimensions

Example of turning

The traverse paths are entered in absolute coordinates with reference to the workpiece zero.

For entering the circle center point coordinates I and J see circle interpolation G2/G3.

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)

Absolute dimensions, G90

The dimensions refer to the origin of the active coordinate system. You program the point to

which the tool is to travel, e.g. in the workpiece coordinate system.

Non-modal absolute dimensioning AC

When G91 is active, AC can be used to allow entry of incremental dimensions for individual

axes in a specific block.

;Tool, spindle on clockwise

;Absolute dimensioning, rapid traverse

;to position XYZ

;Tool infeed at feedrate

;Circle center point in absolute

Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1

Fundamentals

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