How to prepare the file for laser cutting

Main rules in preparetion of files for laser cut machines

1) Width of lines must be Hairline

2) Shapes without fills

3) Stroke colors of lines must be different for inner cut lines, outer cut lines and engaring lines

4) All cutting lines must be closed

5) Objects (circles, rectangles, stars etc) and text must be convert to curves. 
In CorelDraw Ctrl+Q
In Adove Illustrator Ctrl+O

6) Export files fo DXF format