Incremental Dimension - Siemens SINUMERIK 840D sl Programming Manual

Fundamental Geometrical Principles
1.1 Workpiece positions
1.1.5

Incremental dimension

Position specifications in incremental dimensions
In production drawings, the dimensions often do not refer to a zero point, but 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 result for points P2 to P4:
Position
P2
P3
P4
Note
With DIAMOF or DIAM90 active, the set distance in incremental dimensions (G91) is
programmed as a radius dimension.
20
Position specification in incremental dimensions The specification refers to:
X15 Z-7.5
Z-10
X20 Z-10
P1
P2
P3
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals