Scaling (G50, G51) - Siemens Sinumerik 840D sl Programming Manual
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Motion commands
3.2 Defining the input modes of the coordinate values
3.2.3
Scaling (G50, G51)
Properties of G50, G51
The form defined by a part program can be enlarged or reduced according to the required
scale. The desired scaling can be selected and deselected via the following functions.
Table 3- 5
G command
G50
G51
The selection for scaling and mirroring takes place with G51. A distinction is made between
two options in scaling:
● Axial scaling with the parameters I, J, K
● Scaling in all axes with the scaling factor P
Format
There are two different types of scaling.
Scaling along all axes with the same scaling factor
G51 X... Y... Z... P... ; Start scaling
G50; Deselection of scaling
X, Y, Z: Center coordinate value for the scaling (absolute command)
P: Scaling factor
48
G functions for selecting the scale
Function
Scaling OFF
Scaling ON
If I, J, K is not programmed in the G51 block, the relevant default value from the setting
data 43120 $A_DEFAULT_SCALE_FACTOR_AXIS is effective.
Negative axial scaling factors lead additionally to mirroring.
If P is not written in the block G51, the default value from the setting data is effective.
Negative P values are not possible.
G group
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Programming Manual, 06/09, 6FC5398-7BP10-1BA0
ISO Milling
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