Is there a mr1 sheetcam post processor?
Welcome to the forum. Not to my knowledge. Fusion, Solidworks, etc.
I use Fusion.
Sheetcam is a 2D package. Most folks are using the MR1 to machine 3D parts. If I’m wrong maybe see if you can get a few more folks to ask Support and they might get one put together for you all.
You should be able to import your DXF or whatever source drawing into Fusion, or Solidworks to create the appropriate 2D tool path.
Here’s some guides on doing just that.
Import DXF into Fusion 360
Import DXF into SolidWorks
Hopefully that helps