[GTFreeFlyer]

I'm having trouble moving in an arc while I've rotated my coord. system.
For example, try to follow along here:
(Start at 0,0,0)
(Move to x1) G90 G0 X1
(Activate XZ plane) G18
(Cut arc inwards and down) G91 G3 X-.25 Z-.25 R.25
(Rewind one step) G2 X.25 Z.25 R.25
(Activate XY plane) G17
(Rotate coord system 90 deg) G90 G68 A0 B0 R90
(Move to x1) G90 G0 X1 Y0 Z0 (Here the tool moves to what would have been (0,1,0) before the rotation)
(Activate XZ plane) G18
(Repeat arc move above) G91 G3 X-.25 Z-.25 R.25
This is where the path gets messed up. Instead of sweeping in towards the center (0,0), the tool sweeps to the left.
Moving around with g0 and g1 after an axis rotation works well, but moving in an arc seems to ignore the axis rotation.

What I'm trying to do is exactly as above, but I'll move around the circle in 1 degree increments to round the edge of a hole. I can repeat those lines above 360 times with a subroutine and keep the program very short, but it isn't working.

Help?

[samco]

Is this what you are trying to do? (I know this is linuxcnc but thought it might jog some brain cells...)

#1 = 0 (start of arc)
(Start at 0,0,0)
(Move to x1) G90 G0 X1
(Activate XZ plane) G18
o101 while [#1 LT 360]
g10l2p1r[#1]
g90 g0 x1 y0
(Cut arc inwards and down) g91 G3 X-.25 Z-.25 R.25f10
(Rewind one step) G2 X.25 Z.25 R.25
#1=[#1+1]
o101 end while
m30