G41 G42 Problem

Hi, normaly i only read in this forum, but now i have to ask about the G41/G42 funktion.
There are many discussions about whether G41/G42 calculates the approach route correctly or not.
I don't want to pursue these discussions any further, but am more interested in a solution.

It is possible that LinuxCNC can approach correctly with a sufficiently large radius. Unfortunately, I have not yet figured out how to work around the problem if I do not have enough space. I would like to mill a Ø5 hole with an Ø4 end mill.
How is it possible to mill the hole with linuxcnc and G41/G42 without already activating the G41/G42 above the part?

All CAM systems known to me only support the normal G41/G42 but not the Linuxcnc version. I have already tried to convert the coordinates in PP, but so far without success. Does anyone know a solution for this?

As I am not the only one with this problem, it would be advantageous if linuxcnc supported both versions. Maybe a G41.2/G42.2 could be the solution.

Best Chris
 

its in imperial though
5mm hole, 4mm endmill .001" or something in tooltable diameter

Hmmm, you meen i can change the diameter in the tool table from 4mm to 1mm.
If i also reduce the diameter in the program by 3mm, it is possible to use G41.

Yes, this is a possibility, but not a nice one, where mistakes can easily happen.

I understand that many people want to keep the current function of G41, but what's wrong with a 2nd function that works like all other controllers and doesn't require any tricks?

Best Chris

I understand that many people want to keep the current function of G41, but what's wrong with a 2nd function that works like all other controllers and doesn't require any tricks?

If you can provide the code changes needed for this in a pull request on github then I'm sure there would be a fair bit of interest. If you are hoping for others to implement it then that is likely a different story.