Programming manual.
CNC 8070
COORDINATE SYSTEM
3.
Absolute and incremental coordinates in the same block (I).
·65·
(REF: 1709)
3.3 Absolute and incremental coordinates in the same block (I).
The "I" command may be added to the programmed coordinate and it may be used to make
it incremental. This command is non-modal and indicates that the coordinate is programmed
incrementally, regardless of the rest of the block and of the G90/G91 function that is currently
active. This way, it is possible to program absolute and incremental movements in the same
block without having to use the G90/G91 functions. This kind of incremental programming
is the same as G91 regardless of the scope of the application and of the result.
Programming.
This kind of incremental programming is only allowed when programming Cartesian or Polar
coordinates. Add the "I" command after the numeric value of the coordinate to be
programmed incrementally.
Axis programming.
Regarding the axes, the CNC admits incremental programming when they represent
coordinates (position values), blocks like G00, G01, G02, etc and G198, G199 (software
limits). The incremental format is not allowed when the axes have a different meaning (G112,
G74, G14, etc).
Axis programming using wild cards.
The CNC allows incremental programming in the wild-cards for the axes; for @1, @2, @3
and for all the ?n.
Parametric programming.
The CNC allows incremental programming the parameters are used as coordinates (position
values).
Canned cycles.
In the canned cycles, incremental programming is only allowed in the prior movement; it is
not allowed in their entry parameters.
G01 X12.4 Y-0.2 Z10I
X and Y axis movement in absolute coordinates.
Incremental Z axis movement.
G02 X100 Y10I I20 J0
The X coordinate of the end point is programmed in absolute (X100) and the Y
coordinate in incremental (Y10I).
G01 R100I Q45
Polar coordinates. Incremental radius programming.
G01 R150 Q15I
Polar coordinates. Incremental angle programming.
G09 X35 Y20 I-15I J25
The first point (X35 Y20) is in absolute coordinates. The X coordinate of the second
point is programmed in incremental (I-15I) and the Y coordinate is absolute (J25).
@1=12I @2=-34I @3=12.6I
?1=24I ?5=-23I
XP1I
X-P10I
Z [P10+P20]I
Z2=P14I
X100I G81 I-25
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