How to pocket a path with "holes" in it?

[faern]

Hi! I'm trying to pocket some letters with the CNC mill. However, letters with holes in them, such as o and lower case e are cut weirdly and I can't seem to make viaconstructor not cut in the holes/islands of the letter.

Here is an example file file I'm trying to operate on, that shows the issue. I have tried to save it from inkscape as inkscape svg, plain svg, and DXF. All with the same results:

Here is how viaconstructor wants to cut it:

It treats it as two separate objects, in this case rings. And it cuts everything inside each ring. Instead of cutting inside the outer ring, except the stuff inside the inner ring. So the area in the middle of the o is cut twice. I can under objects see two objects, each ring.

Is this possible to achieve what I want with viaconstructor, have I just configured it wrong? I have enabled pocketing. I have tried disabling "islands".

Thank you for a really nice simple software :)

[multigcs]

can you please give me your configuration “viaconstructor.json” and the circle again as DXF

[multigcs]

[faern]

I'll see if I can supply that. I want the inverse of that your screenshots show they cut out. I want to cut (pocket) on the letters. Where the o is black in the svg I uploaded. The letters are supposed to be pockets into wood.

[faern]

This is what I want the end result to look like (temporarily did the pocketing in FreeCAD instead to show it):

Here is the dxf as well as the saved viaconstructor project:
o-with-weird-results.zip

[multigcs]

Ahh, ok, sorry.

i see the problem, the program can't handle it properly, you can put a frame around it and set offset back to auto.
you can deactivate the frame in 'Objects:

...
in the Font-Tool, you can use the Border-Option, this generates the frame around the text

[faern]

I'll try it out! So basically I just invert my vector image. I briefly thought about that, but never tried it as it did not feel like the correct solution. But thank you for telling me this is the way to do it currently ✨

[faern]

This works! It's a bit tricky, but doable. Thank you.
You can decide if you want to keep the issue open or not. There is a workaround, but as you said yourself, this is a limitation in the software currently

[hansu]

i see the problem, the program can't handle it properly, you can put a frame around it and set offset back to auto.
you can deactivate the frame in 'Objects:

Is there a posssibility to create that fram with viaconstructor? If not it would be a nice option to do so.

[hansu]

Ahh, ok, sorry.

i see the problem, the program can't handle it properly

Hmm it can, but not really applicable on multiple objects (and the solids don't match :/):

1. For the inner circle object, activate mill, but not pockets
2. For the outer circle object, activate mill and change the offset to Inside, activate pockets and islands: