tool radius compensation

hello everyone, I'm trying to machine a hole with a diameter of 20mm, but linuxcnc is not compensating for the tool's radius, it's machining a hole with a diameter of 26mmI set the tool radius in the Tool table 6mm.tool 12mm.
how to solve it?
thanks 
G17 G21 G40 G90 G94
T1 M6
G54 S5000 M3 F800
G0 Z30
X0 Y0
Z10
G1 Z0
G1 G41 D1 X10
G2 X10 Y0 I-10 J0 Z-5 P5
G1 G40 X0 Y0
G1 G41 X10 
G3 X10 Y0 I-10 J0
G1 G40 X0 Y0
G0Z30
M30
 

linuxcnc uses tool radius, I put the tool diameter in the tool table linuxcnc gives the following message "arc movement in a concave corner cannot be achieved by the tool without damaging the material"

From my doku, about cuttercompensation. The machining diameter must be >= 2.25 x tooldiameter. It seems this didn't change in the meantime.
G41G42 LEAD IN '2.25 x ToolDia' minLIMIT
 

I inserted the tool diameter into the tool table and the following message appeared ... "Arch movement in a concave corner cannot be achieved by the tool without damaging the material"

Before i tried to explain, linuxcnc needs (too)much space for lead-in when use G41 g42. I tried your code, and any cutter larger than 10mm will generate this error. Easy to test yourself. Try entry in tooltable Dia 10.001 vs. 10.00


 

 

I changed the diameter of the tool to 10 but it continues to make the hole larger than the measurement of 20mm " 21.68mm... I increased the diameter of the tool to 11mm it did not accept it linuxcnc gave an error

If your tool has exactly 12mm diameter, you can try toolpath toolcenterpoint and it must result a 20mm diameter

I made the holes that way... but with the wear of the tool I'll always have to correct it in the program so I wanted to try using tool radius compensation... I'm going to abandon G41, it doesn't work using it here