Programming manual
54
CNC 8070
4.
ORIGIN SELECTION
Polar origin preset (G30)
(SOFT V02.0X)
54
4.6 Polar origin preset (G30)
Function G30 may be used to preset any point of the work plane as
the new polar origin. If not selected, it assumes as polar origin the
origin of the active reference system (part zero).
Programming
The polar origin preset must be programmed alone in the block. The
programming format is "G30 I J", where:
Therefore, function G30 may be programmed as follows:
Properties of the function
Function G30 is modal. The polar origin stays active until another
value is preset or the work plane is changed. When changing the work
plane, it assumes the part zero of that plane as the new polar origin.
On power-up, after an M02 or M30 and after an EMERGENCY or a
RESET, the CNC assumes the currently selected part zero as the new
polar origin.
I, J They define the abscissa and ordinate of the new polar origin. They
must be defined in absolute coordinates referred to part zero.
When programmed, both parameters must be programmed.
If not programmed, it will assume the current tool position as the polar
origin.
Assuming the initial point is X0 Y0:
G30 I35 J30 (Preset P3 as the polar origin)
G90 G01 R25 Q0 (Point P1)
G03 Q90 (Point P2)
G01 X0 Y0 (Point P0)
M30
G30 I J It assumes as the new polar origin the point whose abscissa is "I"
and ordinate "J" referred to part zero.
G30 The current tool position is assumed as the new polar origin.
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