URGENT issue with a CNC laser prototype

I can’t open the illustrator file (is .ai) …I’ve need to convert into DWG or DXF …
I’ll post the files “step-by-step” for show you the steps I did:

Step 1 - Open the DWG file exported from illustrator

STEP 2 - Explode the surface (for delete the surface)

STEP 3 - Here is After explosion and delete the surface

STEP 4 - Convert Curves in Arcs

STEP 5 - Appear the Preview of Arcs
(after that, in “info” appear: polycurve closed with 293 segments of curve")

STEP 6 - Details of the “info” on the left

STEP 7 - This is how apper after “Done button” for the conversion

after that…I save like “DWG” in “2004 Natural” …but, if I save it in “2004 Lines & Arcs” the problem is always the same: a lot of lines connected but split.

They send me a file for show me how they need the file:example.dwg (1.5 MB)