Follow these steps precisely to avoid conflicts.
If by "good paper" you meant "goodware" (safe, clean files):
If you are trying to connect via an older program (like SignCut or ArtCut), use these standard settings for the ROHS 721:
Programs that promise to automatically find your ROHS plotter driver are almost always bundled with adware or worse. Stick to manual methods.
Connect and observe:
Obtain drivers:
Install driver:
Configure COM port (for serial/USB-serial):
Test:
Even after installation, you may encounter issues. Here’s how to solve them.