First of all you must make a plan on your preferred CAD / CAO software. Only the shape of the piece must remain on the plan: no cartridge, no construction lines and no "copyright toto". The laser beam will follow the line you draw.
You must pay attention to two / three things:
- You have to work on a 1:1 mm scale where 1 mm on your plan corresponds to 1 mm in reality
- the cutting lines should not intersect,
- the cutting line should not do a U-turn
- be sure to close your perimeters
- it is necessary that the diameter and / or the piercing details (the space between two cuts) are greater than 0.8 times the thickness of the metal sheet. Thus a piece 5mm thick can’t have holes smaller than a 4mm diameter or a detail implying that one cutting line approaches another by less than 4mm.
- Remember that the centre of an opening falls (and therefore is not included).
- Especially if you cut out letters, the loops of the D, P, R, A or O, fall. To avoid this, use the font STENCIL. There's a whole collection at Dafont.com
Once you've finished drawing your part, save or export the file in AutoCAD Interchange DXF R2014 format