Siemens SINUMERIK 840DE

Positional Data
3.3 Absolute dimension for rotary axes (DC, ACP, ACN)
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
3-11
N10 SPOS=0 ;Spindle in position control
N20 G90 G0 X-20 Y0 Z2 T1 ;Absolute, infeed in rapid traverse
N30 G1 Z-5 F500 ;Lower at feedrate
N40 C=ACP(270) ;The table rotates through 270° in
;clockwise direction (positive), the tool
;mills a circular groove
N50 G0 Z2 M30 ;Lift, end of program
Absolute dimensioning with DC
The rotary axis travels to the position programmed in absolute coordinates along the shortest
direct path. The rotary axis traverses across an area of up to 180°.
Absolute dimensioning with ACP
The rotary axis travels to the positions programmed in absolute coordinates in the positive
direction of axis rotation (counterclockwise).
Absolute dimensioning with ACN
The rotary axis travels to the positions programmed in absolute coordinates in the negative
direction of axis rotation (clockwise).
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Note
The traversing range must be set to between 0° and 360° in the machine data (modulo
method) for positioning with directional data (ACP, ACN). To traverse modulo rotary axes by
more than 360° in a block, G91 or IC must be programmed.
The positive direction of rotation (clockwise or counterclockwise) is set in the machine data.