Can you save a screen shot of the part you want to use 2d on and put it up here? It sounds like to me that you are trying to get 2d toolpaths from a 3d model? Am I correct in this? If so, remember the 2d only works on lines and arcs so the work box created around the 3d part would give you those type entities.
Do this. Create a simple box with a circle inside it with Rhino. Open up Madcam and.............well I just tried it and it doesn't work like I thought. It gives a splash screen saying you must select solids or surfaces first. I thought the 2d had lines and curves only in it but I guess I was wrong.
I was in contact with Joakim this last Friday and he is out of the office till this coming Thursday.
So, knowing that, give me a pic of the part if it is something you can share. I can tell you now, that you will have to extract some lines and curves from the stl for it to work. I have used the 2d but it was always inside a 3d model so the solid or surface thing had already been taken care.
Mike
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