Siemens SINUMERIK 840DE Programming Manual page 85

N10 SPOS=0
N20 G90 G0 X-20 Y0 Z2 T1
N30 G1 Z-5 F500
N40 C=ACP(270)
N50 G0 Z2 M30
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).
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.
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
3.3 Absolute dimension for rotary axes (DC, ACP, ACN)
;Spindle in position control
;Absolute, infeed in rapid traverse
;Lower at feedrate
;The table rotates through 270° in
;clockwise direction (positive), the tool
;mills a circular groove
;Lift, end of program
Positional Data
3-11