G2 or G3

It looks like your object is 2 b-splines. Perhaps this can interest you :
g5.2 g5.3

Thank you. initially lines of this model were nurbes curves (created in Rhinoceros) , but I spent time converting them all to lines and arcs, so, gcode could be written.
G5.2/G5.3 are still experimental and I don't think I want to deal with experimental stuff. Plus, my program is already written to extract coordinates from rhino's file and write gcode for it as G1/G2/G3.

linuxcnc it's self could be called experimental. Nurbs has been in for years with no complains that I remember - but nobody really knows how much it's used (which can be said about a lot of linuxcnc)

Chris

True, Chris.
but in my particular case, I think G2/G3 is what is needed.
Perhaps I am wrong and I would love to hear other opinions, so, let me explain a bit.
The reason I decided to stick with G2/G3 is because these codes are for arcs. and according to linuxcnc manual (and how I understood it) it is better for small arcs. another words, when arc is getting closer to full circle, linuxcnc cannot guarantee the precision. In my case it is ok. the machine I have built is for flat application - it cuts out elements of mosaic out of hard/brittle materials (glass, natural stone). because of this, I realized (actually number of cuts told me this), that I have to chop lines and arc into pretty small ones, to find the balance between feed rate and ability to cut certain pretty hard materials like agate.
so, arcs in my files are very small and should be perfect for G2/G3. and those are relatively easy to program - all you need is end point and radius.

This is what I came up with.
Please, let me know if anyone sees errors in this table or anything is unclear.

What cam are you using VISUALMILL 20x there is a simple HOOK inside your gcode that outputs the Climb/conventional CRC ofset