Radius G02/G03 with facing head

[Squizz]

Hi im having a problem programming to cut a radius. I am not getting any alarms its just cutting a chamfer.

This is on a Horizontal borer using a facing head and fancu 16i control

prog is as follows:

g90
g54
g0 z10
g0 x0 y0 bo
s120 m3
z1
zo.o5
u 4.188
g01 z-0.42 f0.5
z-1.002 u3.6939
g02 z-1.062 u3.5739 r0.12

no alarm just cuts a chamfer basically have tried using g91 also but does the same.

Many thanks

z-1.002 u

[fordav11]

That's a very strange program. I hope all those mistakes and no tool offset are typos or laziness!

If the radius is 0.12 and is 90 degrees it looks like you are not moving enough in X (U) based on your R value. I assume the facing slide axis is U? normally U is an incremental movement but it's still on diameter. Looks like your U is diameter but just the other facing axis? What machine do you have? I'm interested to see the axis configuration.

In any case from your start point to your end point you are moving 0.12 in U and your Z movement is 0.060.
That would work if the R was 0.060 but it's not. If you need a radius of 0.12 the U movement distance needs to be doubled.

If you change your R to 0.06 it'll work as-is but your radius will be 0.060 instead.
Z-1.002 U3.6939
G02 Z-1.062 U3.5739 R0.06

Or if you want a radius of 0.12 .....
Z-1.002 U3.6939
G02 Z-1.122 U3.4539 R0.12