3 Directions of Movement, Dimensioning 05.91
3.3 Dimension systems: absolute and incremental position data G90/G91
Incremental position data input G91
In the case of incremental data input, the numerical value corresponds to the path to be
traversed. The sign indicates the direction of movement.
Example:
The tool is at position (P1) X = 20, Y = 10 and is to move to position (P2) X = 60, Y = 30.
The input is:
G91 X40 Y20
The tool moves on by the distance specified by the programmed values with reference to its
current position.
X=40
P2
W
X
604020
a
a
a
a
P1
Y
20
10
30
Y=20
Note:
After the below functions have been programmed, all axes must be once programmed with
G 90 if compensating values have previously been allowed for (zero offset, tool offset ...):
• G 74
• G 200
• @ 720
• Selection and deselection of a transformation (also coordinate rotation)
3–4
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SINUMERIK 880, (PG)