I am a happy cambam user (CamBam.CAD : 0.9.5729.19316)
Everynow and then, the various CAD tools i use produce lines that aren't joined. That is typically the case for FreeCAD 2D projections.
In that case, i just CTRL+A everything in cambam, then CTRL+J the lines/polylines/whatever, enter 0.1 as tolerance and tadaaaaaa... i ended with a single closed polyline that i can later profile (cut basically).
Instead of 3D print a 12 tooth gear -- because basically i want it more precise and more durable -- i want to cnc mill it in delrin plastics for once.
So i did as usual, extracted my FreeCAD 2D plan as dxf, open it in cambam, select everything...
but unfortunately, this time i end with several "polyline", and -- i guess -- therefore i end up with an unusable profile output :
From freecad, I tried to output as svg, then open in Inkscape, then "Combine" (CTRL+K) all lines, then save as DXF => to no avail, same problem
any idea anyone ?