Incremental Dimension - Siemens SINUMERIK 840D sl Programming Manual

Fundamentals
2.1 Fundamental Geometrical Principles
In absolute dimensions, the following position specifications result for points P1 to P3:
Position
P1
P2
P3
2.1.1.5

Incremental dimension

Position specifications in incremental dimensions
In production drawings, the dimensions often do not refer to a zero point, but rather to another
workpiece point. So that these dimensions do not have to be converted, they can be specified
in incremental dimensions. In this method of dimensional notation, a position specification
refers to the previous point.
Applied to tool movement this means:
The incremental dimensions describe the distance the tool is to travel.
Example: Turning
In incremental dimensions, the following position specifications are obtained for points P2 to P4:
Position
P2
P3
P4
Note
With DIAMOF or DIAM90 (Page 162) active, the set distance in incremental dimensions (G91)
is programmed as a radius dimension.
32
Position specification in absolute dimensions
X20 Y35
X50 Y60
X70 Y20
Position specification in incremental dimensions The specification refers to:
X15 Z-7.5
Z-10
X20 Z-10
P1
P2
P3
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming