Siemens SINUMERIK 840D sl Programming Manual page 157

Syntax
<Rotary axis>=DC(<Value>)
<Rotary axis>=ACP(<Value>)
<Rotary axis>=ACN(<Value>)
Meaning
<Rotary axis>:
DC:
ACP:
ACN:
<Value>:
Note
The positive direction of rotation (clockwise or counter-clockwise) is set in the machine data.
Note
The traversing range between 0° and 360° must be set in the machine data (modulo behavior)
for positioning where the direction is specified (ACP, ACN). G91 or IC must be programmed to
traverse modulo rotary axes more than 360° in a block.
Note
The commands DC, ACP and ACN can also be used for spindle positioning (SPOS, SPOSA)
from standstill.
Example: SPOS=DC(45)
Example
Milling on a rotary table
The tool is stationary, the table turns to 270° in a clockwise direction. A circular groove/slot is
machined.
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Identifier of the rotary axis that is to be traversed (e.g. A, B or C)
Command to directly approach the position
The rotary axis approaches the programmed position directly along the shortest
path. The rotary axis traverses a maximum range of 180°.
Command to approach the position in the positive direction
The rotary axis traverses to the programmed position in the positive direction of
axis rotation (counter-clockwise).
Command to approach the position in the negative direction
The rotary axis traverses to the programmed position in the negative direction of
axis rotation (clockwise).
Rotary axis position to be approached in absolute dimensions
Value range: 0 - 360 degrees
Fundamentals
2.8 Geometry settings
157