Since the LASER probably uses G-Code for cutter control, and you’re using a brain dead file format that does not handle NURBS curves, you either need to use a different export file format, IGES is preferred. Check with the LASER guys to see if they can handle IGES files.
If so, that’s the easy fix.
If not, if you must you DXF, then you will need to convert all your curves that are not already straight lines, circles, and arcs, to chains of arcs using the Convert command.
You’ll need to convert your Degree=3 (and higher), curves in Rhino before exporting them as DXF/DWG.
Your Mill/Router/WaterJet follows G-code instructions. G-code supports three movements:
1 - Straight lines
2 - Clockwise arcs
3 - Anticlockwise arc
It’s your job to make sure you’re only send supported curves to the machine.
Lines, arcs and circles in Rhino are good to go.
Twisty Rhino NURBS curves need to be converted to arc chains. If you don’t convert them, they will be approximated by hundreds of short straight lines.
Since you need more efficient Arc objects in your DXF/DWG file, you’ll need to convert your wiggly Rhino curves to arc segments before exporting.
Use the Rhino Convert command.
Use these command option settings:
Tolerance=0.01mm or 0.002"
The tolerance controls how far the arcs will pull away from your NURBS curves. Your machining process and project will determine how much is OK. The distance is in current model units.
Then when you Export to DXF, use the “CAM Imperial” export scheme for inches and “CAM Metric” for millimeters. Both of these export simple geometry as lines and circles.
Always check your DXF file by opening it in Rhino before you send it for cutting to make sure it looks good.