Hi!

I am having trouble with G02/G03 with IJK method.

This is the arc i am trying to define:



This is my attempt at the gcode

Code:
M3 S4000 ;
G90 G21 ;
G0 Z0.500 ;
G0 X5.900 Y0.000 ;
G1 Z-0.700 F50 ;
G18 G03 X4.100 Y0.000 Z-0.700 I-0.900 J+1.2 F50 ;
G0 Z0.500 M2 ;
It results in a tangetal arc like this:



My mill does not accept M90.1 so I have to work with I and K as relative coordinates.
I don't think i can use the R method since i sometimes need to move in Y as well.

How can i alter my program to move in the arc shown in my first image?