CNC 8035 - Programming manual - Fagor Automation

Programming manual
4.
REFERENCE SYSTEMS
Polar origin preset (G93)
CNC 8035
·T· MODEL
(SOFT V16.3X)
·66·
4.5 Polar origin preset (G93)
Function G93 allows you to preset any point from the work plane as a new origin of polar coordinates.
This function must be programmed alone in the block, its programming format being :
G93 I±5.5 J±5.5
Parameters I & J respectively define the abscissa and ordinate axes, of the new origin of polar
coordinates referred to part zero.
The values assigned to those parameters are programmed in either radius or diameter depending
on the setting of axis machine parameter "DFORMAT".
Example programming the X axis in diameter.
G90 X180 Z50 ; Point P0.
G01 X160 ; Point P1, in a straight line (G01).
G93 I90 J160 ; Presets P5 as Polar origin.
G03 Q270 ; Point P2, in an arc (G03).
G01 Z130 ; Point P3, in a straight line (G01).
G93 I130 J0 ; Presets P6 as Polar origin.
G02 Q0 ; Point P4, in an arc (G02).
If G93 is only programmed in a block, the point where the machine is at that moment becomes the
polar origin.
On power-up; or after executing M02, M30; or after an EMERGENCY or RESET; the CNC assumes
the currently active part zero as polar origin.
When selecting a new work plane (G16, G17, G18, G19), the CNC assumes as polar origin the part
zero of that plane.
i
The CNC does not modify the polar origin when defining a new part zero; but it
modifies the values of the variables: "PORGF" y "PORGS".
If, while selecting the general machine parameter “PORGMOVE” a circular
interpolation is programmed (G02 or G03), the CNC assumes the center of the arc
as the new polar origin.