I use a drag knife to cut out these strips from cardboard boxes, and then glue them together to build cat scratchers.
Materials:
Cardboard
Machine Type:
X-Carve
Notes:
Make sure you orient the box the right way, otherwise you won't see the corrugation against the edge like you expect.
I used another piece of cardboard as a "soft spoilboard" underneath the one I was cutting, and I attached it with double sided tape to the actual spoilboard (if the knife catches the MDF it will likely make the machine skip steps)