Owner's manual

Axis Motion
Chapter 14
14-6
The system installer determines which axes are assigned to each plane in
AMP. This manual assumes the axes are assigned to the planes as
indicated below:
Circular Interpolation in XY plane
G17{G02} X__ Y__ {I__ J__} F__ ;
G03 R__
Circular Interpolation in ZX plane
G18{G02} Z__ X__ {K__ I__} F__ ;
G03 R__
Circular Interpolation in YZ plane
G19{G02} Y__ Z__ {J__ K__} F__ ;
G03 R__
Where : Is :
X, Y, Z
In absolute (G90) mode,these arethe coordinatevaluesoftheend-point. In
incremental (G91) mode,these arethe positions oftheend-pointinreferenceto
the start-point
CAUTION: Ifnoaxiswordisspecified fortheend-pointofoneoftheaxesin
the currently defined plane,the control will assume avalueforthataxis equal to
the currenttoollocation. Specifying the wrong plane orwrongaxiswordfora
circularmovecan inadvertentlygenerate ahelicalmove (seesection 14.1.4).
I, J, K
These determine the position ofthe arccenterin reference to the start-point.
These values are always incremental regardlessofthe establishedpositioning
mode(absoluteor incremental). Iisparallel to Xaxis,Jisparallel to Yaxis,and
Kis parallelto Z axisin this manual. Refertothesysteminstaller’s
documentation forintegrand words.
R
Rather thandefininga centerwith I,J,K,the optionexists to define anarcradius
usingR. Thesign ofthisentry determinesthearccenter-pointlocation. IfRis
programmed asa positivevalue,the center-pointwillbe located such thatan arc
lessthanorequal to 180
• isgenerated. If R isprogrammed asa negative
value,the center-pointwillbe locatedsuchthatanarcgreaterthan180
• is
generated. RefertoFigure14.5 foranexample.
F
Anotheroptionistoenterafeedratetangentto the arc. Ifomitted,the control will
usethefeedrateactive prior to thisblock.